When you start shopping for residential solar equipment, the inverter often becomes the make-or-break decision. It’s the heart of any PV system, translating sunlight into usable power and deciding how much energy you actually get to use or store. This review unpacks the strengths and trade-offs of Solis inverters, explains how to pick the right model, and offers practical advice installers and homeowners can use.

Who makes Solis and why the brand matters

Who makes Solis and why the brand matters

Solis is the commercial name you’ll see on a wide range of string and hybrid inverters, and the company behind the brand has grown into a global manufacturer over the last decade. The firm supplies equipment for residential, commercial, and utility-scale systems, and its products are common in markets where cost-effectiveness matters as much as performance.

Why this matters is simple: you’re not just buying a box with electronics, you’re buying into a supply chain and support network. A manufacturer’s scale affects warranty handling, replacement parts availability, and whether local installers are familiar with the product.

What Solis offers: product categories and use cases

What Solis offers: product categories and use cases

Solis makes several categories of inverters suited to different household needs: basic single-phase string inverters for straightforward rooftop arrays, three-phase models for larger homes or commercial setups, and hybrid inverters designed to work with batteries. The hybrid models enable energy storage and can support backup loads when paired with a battery bank.

From a practical standpoint, homeowners usually choose a standard string inverter when they want simplicity and low cost. Hybrid inverters attract buyers who want future-proofing: adding batteries later, enabling time-of-use arbitrage, or keeping lights on during outages.

Single-phase string inverters

Single-phase string inverters

Single-phase models are the bread-and-butter residential option. They’re compact, generally less expensive, and integrate easily into typical home electrical systems. For most suburban rooftops with one household meter, a single-phase Solis inverter is a straightforward, economical choice.

These units typically offer multiple MPPT inputs to handle arrays split across different roof orientations. That flexibility matters if you have panels facing both east and west or a mix of shading conditions.

Three-phase inverters

If you have a larger property, three-phase power, or plan a high-output system, three-phase inverters distribute load and can improve balance across circuits. Commercial or multi-unit properties often use three-phase Solis inverters for those reasons. They also suit homes with heavy electrical usage or ambient conditions that favor larger systems.

Three-phase inverters tend to be more expensive and require installers who understand three-phase wiring and protection. But for the right application, they reduce the risk of overloads and can improve inverter longevity by spreading the electrical duty cycle.

Hybrid inverters and energy storage

Hybrid inverters combine solar conversion with battery management features, enabling charging and discharging of batteries either DC-coupled or AC-coupled depending on the design. For homeowners aiming to add resilience or shift consumption to cheaper tariff periods, hybrids simplify the overall system architecture. Solis hybrid models typically support on-grid operation, backup modes, and integration with common battery chemistries.

Battery compatibility and how backup is implemented (whole-home vs. critical loads) differ by model and installer setup. If backup during an outage is crucial, ask for a detailed schematic showing what circuits will be supported and whether automatic transfer is included.

Key technical features to evaluate

When comparing inverters, some numbers tell you more than marketing claims. Look at rated efficiency, number of MPPTs and their voltage ranges, AC and DC disconnect capabilities, and overload handling. These specifications determine both the short-term energy harvest and the long-term performance of your system.

Monitoring and communications are also fundamental. A good monitoring platform makes it easy to identify underperforming strings or inverter faults without a rooftop climb. Solis provides cloud-based monitoring tools in many markets, and compatibility with third-party monitoring systems can be a plus.

Efficiency and performance

Peak conversion efficiency gives you an idea of how much DC power the inverter can convert under ideal conditions. Real-world efficiency over time is influenced by thermal management, MPPT tracking, and how often the inverter operates near its rated capacity. Cooling strategies—passive versus active—can influence degradation and noise levels at the roofline.

Manufacturers often quote weighted efficiencies and top-line percentages. Use those figures as a comparison baseline rather than an absolute promise; expected annual energy yield depends on many factors beyond the inverter alone.

MPPTs and input flexibility

Maximum power point trackers (MPPTs) are where the inverter extracts the most energy from your panel strings. Multiple MPPTs allow independent optimization of arrays on different roof aspects or with mixed tilt angles. That means fewer losses when parts of the array see different irradiance or shading.

Check the MPPT voltage windows and MPPT count relative to your planned string layout. If you have mismatched string lengths or future expansion plans, a model with flexible MPPT inputs will save headaches later.

Grid features and safety

Modern inverters must meet grid interconnection requirements like anti-islanding protection, reactive power control, and low-voltage ride-through behavior for some jurisdictions. Solis equipment typically includes standard anti-islanding and grid-safety features, but the specifics depend on regional firmware and certifications. Always verify that the model you choose is certified for your local grid code.

Safety features such as built-in DC isolation, ground fault protection, and rapid shutdown compatibility are worth checking. Installers will know which devices are legally required in your area, and a properly equipped inverter can simplify the compliance paperwork.

Sizing a Solis inverter for your home

Sizing means balancing the inverter’s AC rating with the expected solar array DC power and the household’s consumption patterns. Oversizing the DC array relative to the inverter (known as DC/AC ratio) is common and can increase energy harvest during low-light conditions, but it raises the risk of clipping on very sunny days.

As a practical rule, many installers use a DC/AC ratio between 1.1 and 1.4 for residential systems, though local climate and panel performance affect the optimal ratio. Talk with your installer about whether a slightly undersized or oversized inverter suits your production goals.

Matching inverter capacity to load and future plans

Think about whether you will add batteries, expand the system, or change electric loads. If you plan to add storage or EV charging later, choosing an inverter with spare capability or hybrid options may be smarter than minimizing upfront cost. Some owners regret buying the smallest affordable inverter because upgrades later can mean replacing the unit entirely.

If your household has high peak loads—like air conditioners, heat pumps, or electric vehicle chargers—coordinate inverter selection with breaker sizing and possible demand-management features. The right inverter can help avoid repetitive nuisance tripping and can smooth peaks when combined with storage or load control.

Installation and commissioning realities

An inverter is only as good as its installation. Proper placement—ventilation, shade avoidance, and service access—will affect cooling and lifespan. Mounting on load-bearing walls with good airflow is better than squeezing the box into a tight, hot utility closet.

Commissioning involves firmware configuration, grid parameters setup, and monitoring registration. A competent installer will perform string checks, verify conductor sizing, and test islanding protection. Ask for a commissioning report and monitoring login so you can watch production from day one.

Common installer preferences

Installers often prefer inverters that are straightforward to wire and commission, with clear labeling and good documentation. Solis models tend to be straightforward in this regard, but the value of experience cannot be overstated: an installer familiar with the brand will wire faster and avoid pitfalls. If possible, select an installer who has previously commissioned multiple Solis systems.

Availability of spare parts and replacement units is another installer concern. A manufacturer with a broad distribution footprint reduces downtime in the event of a warranty repair. Ask your installer about local stock and lead times before signing a contract.

Performance and reliability in the real world

On paper, many inverters look similar. The differentiator is how consistent they remain after years of thermal cycling and weather exposure. Homeowner reports and installer feedback generally place Solis within the mid-to-upper range for reliability among mainstream brands. Systems with proper ventilation and correct sizing tend to age well.

Failures do happen with any manufacturer, and response times for warranty support vary by region. Evaluating service networks—how quickly a company can dispatch a replacement or authorize a repair—matters more than a marginal gain in nameplate efficiency.

Monitoring and identifying underperformance

Cloud monitoring makes it easier to spot string-level drop-offs before they become full inverter faults. Solis’ monitoring solutions, where available, provide production dashboards and error logging. Regularly checking the portal or app helps you spot panel issues, shading changes, or wiring faults early.

When performance is low, a systematic approach helps: compare the inverter’s reported DC input and AC output over several days, review the historical generation curve, and check for firmware updates. Installers appreciate a homeowner who brings their monitoring data to service calls rather than guessing at the problem.

Warranty, support, and software

Warranty length and what it covers are essential buying factors. In many markets, Solis offers a standard manufacturer warranty, and extended warranty options may be available through distributors or installers. Read the fine print: warranties vary in whether they cover replacement units, labor, or shipping costs.

Software updates can improve stability and add features over time. Check whether the inverter’s firmware can be updated remotely and whether the manufacturer actively releases updates to address bugs or grid-code changes. An actively maintained product is less likely to be obsoleted by new regulatory requirements.

Monitoring platforms and user experience

Usability of the manufacturer’s monitoring portal is often underestimated. A well-designed dashboard gives clear daily yield, lifetime energy, and alarm notifications. If you plan to manage the system yourself, test the monitoring app during installation and make sure you have convenient access via phone and web.

Integration with third-party home energy management systems can broaden functionality. For example, linking inverter output to a smart thermostat, EV charger, or home battery management system enables automated energy shifting. Ask your installer about API availability and supported integrations.

Costs and value: what you actually pay for

Inverter cost is a significant portion of a solar system’s hardware budget, but it’s not the only cost. Installation labor, permitting, racking, and wiring add up. Comparing quotes on a per-watt basis can be helpful, but factor in warranty terms and anticipated lifetime performance.

Less expensive inverters can yield attractive short-term savings but may cost more in downtime or early replacement. Conversely, paying a premium for a top-tier brand sometimes buys only marginal gains in efficiency. For many homeowners, Solis strikes a balance between cost and features.

Return on investment considerations

To evaluate ROI, estimate annual generation, factor in utility rates and time-of-use differentials, and include potential battery savings. If you plan to finance the system, include financing costs when measuring payback. An inverter that supports battery integration can increase long-term value if you later adopt storage.

Rebates or incentives sometimes require certain certifications or inverter features. Confirm eligibility before purchase so you don’t lose access to rebates due to a mismatched component choice.

Pros and cons at a glance

Summarizing trade-offs helps frame the choice. On the plus side, solis-brand inverters are known for competitive pricing, a broad product lineup, and adequate feature sets for most residential systems. The downsides are that some high-end features found on premium brands may be absent or that regional support can be variable.

  • Pros: cost-effective, broad product range, suitable for many residential applications.
  • Cons: regional support varies, advanced features may lag premium competitors.

How Solis stacks up against competitors

Comparisons depend on what you value: raw efficiency, advanced power electronics, or ecosystem features. Premium brands sometimes offer slightly higher efficiencies, more refined monitoring, or unique warranties. Solis tends to position itself on the value side—offering solid performance for a lower price point.

Microinverter solutions and power optimizer systems approach the same problem differently, giving better per-panel optimization at higher cost. If your roof has heavy shading or many orientations, microinverters or optimizers might beat any string inverter. For relatively uniform roofs, solis string inverters usually deliver the best dollar-per-watt outcome.

Practical tips from installers and homeowners

Installers consistently recommend getting the inverter installed in a shaded, ventilated location where service calls are easy. That reduces heat stress and makes future troubleshooting simpler. Placing the inverter where it can be seen from a window or easily accessed also encourages homeowners to keep an eye on production.

When securing quotes, ask for a line-item breakdown of each component and labor. Look for anything marked as optional to avoid surprise add-ons on the invoice. Also ask about commissioning documentation, monitoring login, and local warranty handling so you’re not surprised months later.

Troubleshooting common issues and simple fixes

Some common problems owners encounter include communication errors with the monitoring portal, inverter alarms, and unexpected drops in daily generation. Many issues have straightforward checks: verify the AC connection and breakers, confirm the DC fuses and string voltages, and check that the inverter’s firmware is current.

If the inverter displays a persistent error code, record it and consult the installer or the manufacturer’s support documentation. Avoid opening the inverter yourself: internal components carry hazardous voltages even when off. A reputable installer should include fault diagnosis in their service offering.

Steps to take after a production drop

Start with the simple things: check the monitoring app for string voltages, compare production to the same day of the previous week, and inspect visible components for damage or shading. If panels appear clean and the inverter logs look normal, ask the installer to perform an on-site inspection and IV curve testing if necessary.

Documenting dates, weather, and any changes to nearby structures or foliage helps narrow causes. Many production drops are due to new shading from trees or seasonal changes in sun angle rather than equipment failure.

Buying advice and how to vet installers

Pick installers who can show a portfolio of completed, commissioned systems—preferably with systems similar to what you want. Request references and ask whether they do their own warranty work or rely on the manufacturer’s service network. A local installer who handles warranty repairs in-house can speed up fixes.

Get multiple quotes and compare like-for-like: identical panel counts, same inverter model, and equivalent racking and electrical components. Beware of quotes that omit critical items like surge protection, AC/DC disconnects, or monitoring setup—those often turn into costly add-ons later.

FAQs homeowners ask most often

Homeowners frequently ask whether Solis inverters support two independent roof orientations, whether they can be used with batteries, and how long they typically last. In general, look for models with multiple MPPTs for mixed orientations, hybrid models for storage compatibility, and ensure the inverter’s warranty matches your expectations for service life.

Another common question is about noise. Inverters with active cooling fans produce audible sound—important if the unit is near living spaces. If noise is a concern, ask for a model with passive cooling or install the unit where noise won’t be intrusive.

Sample specification checklist before purchase

Use a short checklist to ensure you compare apples to apples. Confirm AC output rating, MPPT count and voltage range, grid compliance certifications for your region, warranty length and scope, monitoring capabilities, and battery compatibility if you plan to store energy. This prevents surprises during installation and early operation.

Item What to verify
AC rating Matches household load profile and breaker limits
MPPTs/inputs Enough MPPTs for your roof orientations and string layout
Monitoring Accessible app/web portal and alarm notifications
Certifications Local grid code approval and safety listings
Warranty Duration, coverage, and extension options

A word on longevity and future-proofing

Technology and grid rules evolve, and the inverter you buy today should not lock you into an inflexible system. Choosing a model that supports firmware updates, offers battery integration options, and provides open monitoring can protect your investment. Solis models often support these practical needs, but confirm each detail for the specific model you’re considering.

Finally, treating the installation with care—appropriate ventilation, correct stringing, and conservative thermal margins—keeps the inverter operating reliably longer than chasing the last decimal of efficiency on a brochure.

Wrapping up your decision

Buying an inverter is an exercise in balance: cost, features, service, and long-term support all matter. Solis offers options that appeal to value-conscious homeowners who want a reliable product without the premium price of some competitors. If you prioritize easy upgrades, good monitoring, and a familiar installer, a solis inverter can be a sensible central piece of a residential solar system.

Ask for detailed specs, compare installation practices and warranty handling, and choose an installer who will stand by the work. That combination—sound hardware plus competent installation—determines whether your system will meet expectations for decades of clean energy production.

Is one type of inverter clearly superior? Both transformer-based and transformerless inverters have their own sets of advantages. Transformer-based inverters are generally seen as more reliable, especially for off-grid solar systems.

Introduction

In the rapidly advancing field of solar energy systems, inverters stand as a cornerstone. Facilitating the conversion of direct current (DC) electricity from solar panels into the alternating current (AC) used by our appliances. The pivotal question for many is choosing between transformer-based and transformerless inverters. This detailed guide delves into the intricacies of Transformer Based vs Transformerless Inverters.

Transformer-Based Inverters: The Trusted Choice

Overview

Transformer-based inverters come equipped with an internal transformer that harmonizes the voltage between the DC source and the AC output. A feature that has been a reliable choice in solar energy systems for many years.

Pros

  • Electrical Isolation: This feature safeguards the system from electrical disturbances, promising a stable and reliable power supply. This is a vital aspect for off-grid solar systems.
  • Robustness: These inverters are renowned for their ruggedness. Making them a fitting choice for demanding environments requiring high durability and galvanic isolation.
  • Better Performance in Unstable Grid Conditions: Transformer-based inverters can maintain a consistent performance even in areas with fluctuating grid conditions, making them a more reliable choice for off-grid solar systems in remote locations.
  • High Surge Capacity: These inverters can handle high surge capacities effectively, which is essential in environments with unstable power supplies or where grid disturbances are common. This is because they are a low frequency inverter
  • Less Sensitive to Electromagnetic Interference: Ensuring a stable power output even in areas with high levels of electrical noise.

Cons

  • Size and Weight: Although they are bulkier, their robust nature and reliability often outweigh this downside, particularly in off-grid setups where durability is a priority.
  • Cost: While they carry a higher price tag, the investment is often justified by the reliability and longevity they offer.
  • Lower Efficiency: The presence of a transformer can introduce energy losses, which, while mitigated at higher power levels, can be a concern at lower power outputs.

Transformerless Inverters: The Contemporary Alternative

Overview

Transformerless inverters, offering a modern approach with a multi-step computerized process for voltage synchronization, might sometimes fall short in meeting the demands of off-grid systems.

Pros

  • Compactness: Their smaller size can be a benefit in settings with limited space.
  • Energy Efficiency: These inverters are known for higher energy efficiency, reducing operational costs over time.
  • Reactive Power Support: They can actively control reactive power, ensuring a stable voltage output and better system performance, which is particularly beneficial in areas with weak grids or high power factor issues

Cons

  • Surge and Shock Risks: The simpler design increases susceptibility to surges and shocks, a considerable downside for off-grid systems.
  • Grounding Concerns: The absence of electrical isolation necessitates additional safety measures, increasing the setup complexity and concerns regarding grounding and lightning protection.
  • Limited Surge Capacity: They may not be suitable for applications requiring high surge capacities and can be more sensitive to electromagnetic interference, affecting performance in areas with high electrical noise levels.

Making the Right Choice

When it comes to making a choice, considering your specific needs is essential. Transformer-based inverters often emerge as the preferred choice for off-grid solar systems, offering reliability and peace of mind.

Opting for a professional consultation can help you understand the nuances and make an informed decision.

Conclusion

In conclusion, a deep understanding of the differences between transformer-based and transformerless inverters is crucial when setting up an off-grid solar system. While transformer-based inverters stand tall in terms of reliability and electrical isolation, it is essential to acknowledge the benefits of transformerless inverters. Making the best choice ensures a sustainable future, taking into account factors such as power output requirements, voltage stability considerations, design and installation requirements, cost, long-term savings potential, and environmental impact.

U.S. energy officials are reassessing the risk posed by Chinese-made devices that play a critical role in renewable energy infrastructure after unexplained communication equipment was found inside some of them, two people familiar with the matter said. Power inverters, which are predominantly produced in China, are used throughout the world to connect solar panels and wind turbines to electricity grids. They are also found in batteries, heat pumps and electric vehicle chargers.

While inverters are built to allow remote access for updates and maintenance, the utility companies that use them typically install firewalls to prevent direct communication back to China.

However, rogue communication devices not listed in product documents have been found in some Chinese solar power inverters by U.S experts who strip down equipment hooked up to grids to check for security issues, the two people said.

Over the past nine months, undocumented communication devices, including cellular radios, have also been found in some batteries from multiple Chinese suppliers, one of them said.

Reuters was unable to determine how many solar power inverters and batteries they have looked at.

The rogue components provide additional, undocumented communication channels that could allow firewalls to be circumvented remotely, with potentially catastrophic consequences, the two people said.

Both declined to be named because they did not have permission to speak to the media.

“We know that China believes there is value in placing at least some elements of our core infrastructure at risk of destruction or disruption,” said Mike Rogers, a former director of the U.S. National Security Agency. “I think that the Chinese are, in part, hoping that the widespread use of inverters limits the options that the West has to deal with the security issue.”

A spokesperson for the Chinese embassy in Washington said: “We oppose the generalization of the concept of national security, distorting and smearing China’s infrastructure achievements.”

Using the rogue communication devices to skirt firewalls and switch off inverters remotely, or change their settings, could destabilise power grids, damage energy infrastructure, and trigger widespread blackouts, experts said.

“That effectively means there is a built-in way to physically destroy the grid,” one of the people said,

The two people declined to name the Chinese manufacturers of the inverters and batteries with extra communication devices, nor say how many they had found in total.

The existence of the rogue devices has not previously been reported. The U.S. government has not publicly acknowledged the discoveries.

Asked for comment, the U.S. Department of Energy (DOE) said it continually assesses risk associated with emerging technologies and that there were significant challenges with manufacturers disclosing and documenting functionalities.

“While this functionality may not have malicious intent, it is critical for those procuring to have a full understanding of the capabilities of the products received,” a spokesperson said.

Work is ongoing to address any gaps in disclosures through “Software Bill of Materials” – or inventories of all the components that make up a software application – and other contractual requirements, the spokesperson said.

TRUSTED EQUIPMENT

As U.S.-China tensions escalate, the U.S. and others are reassessing China’s role in strategic infrastructure because of concerns about potential security vulnerabilities, two former government officials said.

“The threat we face from the Chinese Communist Party (CCP) is real and growing. Whether it’s telecom hacks or remotely accessing solar and battery inverters, the CCP stops at nothing to target our sensitive infrastructure and components,” said U.S. Representative August Pfluger, a Republican member of the Committee on Homeland Security.

“It is about time we ramp up our efforts to show China that compromising us will no longer be acceptable,” he told Reuters.

In February, two U.S. Senators introduced the Decoupling from Foreign Adversarial Battery Dependence Act, banning the Department of Homeland Security from purchasing batteries from some Chinese entities, starting October 2027, due to national security concerns.

The bill was referred to the Senate Committee on Homeland Security and Governmental Affairs on March 11 and has yet to be enacted.

It aims to prevent Homeland Security from procuring batteries from six Chinese companies Washington says are closely linked to the Chinese Communist Party: Contemporary Amperex Technology Company (CATL) (300750.SZ), BYD Company (002594.SZ), Envision Energy, EVE Energy Company (300014.SZ), Hithium Energy Storage Technology Company, and Gotion High-tech Company (002074.SZ).

None of the companies responded to requests for comment.

Utilities are now preparing for similar bans on Chinese inverter manufacturers, three people with knowledge of the matter said.

Some utilities, including Florida’s largest power supplier Florida Power & Light Company, are attempting to minimise the use of Chinese inverters by sourcing equipment from elsewhere, according to two people familiar with the matter. FPL did not respond to requests for comment.

The DOE spokesperson said: “As more domestic manufacturing takes hold, DOE is working across the federal government to strengthen U.S. supply chains, providing additional opportunities to integrate trusted equipment into the power grid.”

‘CATASTROPHIC IMPLICATIONS’

Huawei is the world’s largest supplier of inverters, accounting for 29% of shipments globally in 2022, followed by Chinese peers Sungrow and Ginlong Solis, according to consultancy Wood Mackenzie.

German solar developer 1Komma5 said, however, that it avoids Huawei inverters, because of the brand’s associations with security risks.

“Ten years ago, if you switched off the Chinese inverters, it would not have caused a dramatic thing to happen to European grids, but now the critical mass is much larger,” 1Komma5 Chief Executive Philipp Schroeder said.

“China’s dominance is becoming a bigger issue because of the growing renewables capacity on Western grids and the increased likelihood of a prolonged and serious confrontation between China and the West,” he said.

Since 2019, the U.S. has restricted Huawei’s access to U.S. technology, accusing the company of activities contrary to national security, which Huawei denies.

Chinese companies are required by law to cooperate with China’s intelligence agencies, giving the government potential control over Chinese-made inverters connected to foreign grids, experts said.

While Huawei decided to leave the U.S. inverter market in 2019 – the year its 5G telecoms equipment was banned – it remains a dominant supplier elsewhere.

Huawei declined to comment.

In Europe, exercising control over just 3 to 4 gigawatts of energy could cause widespread disruption to electricity supplies, experts said.

The European Solar Manufacturing Council estimates over 200 GW of European solar power capacity is linked to inverters made in China – equivalent to more than 200 nuclear power plants.

At the end of last year, there was 338 GW of installed solar power in Europe, according to industry association SolarPower Europe.

“If you remotely control a large enough number of home solar inverters, and do something nefarious at once, that could have catastrophic implications to the grid for a prolonged period of time,” said Uri Sadot, cyber security program director at Israeli inverter manufacturer SolarEdge.

STRATEGIC DEPENDENCIES

Other countries such as Lithuania and Estonia acknowledge the threats to energy security. In November, the Lithuanian government passed a law blocking remote Chinese access to solar, wind and battery installations above 100 kilowatts – by default restricting the use of Chinese inverters.

Energy minister Zygimantas Vaiciunas said this could be extended to smaller rooftop solar installations.

Estonia’s Director General of the Foreign Intelligence Service, Kaupo Rosin, said the country could be at risk of blackmail from China if it did not ban Chinese technology in crucial parts of the economy, such as solar inverters.

Estonia’s Ministries of Defence and Climate declined to comment when asked if they had taken any action.

In Britain, the government’s review of Chinese renewable energy technology in the energy system – due to be concluded in the coming months – includes looking at inverters, a person familiar with the matter said.

In November, solar power inverters in the U.S. and elsewhere were disabled from China, highlighting the risk of foreign influence over local electricity supplies and causing concern among government officials, three people familiar with the matter said.

Reuters was unable to determine how many inverters were switched off, or the extent of disruption to grids. The DOE declined to comment on the incident.

The incident led to a commercial dispute between inverter suppliers Sol-Ark and Deye, the people said.

“Sol-Ark does not comment on vendor relationships, including any relationship with Deye, nor does it have any control over inverters that are not branded Sol-Ark, as was the case in the November 2024 situation you referenced,” a Sol-Ark spokesperson said.

Deye (605117.SS) did not respond to requests for comment.

The energy sector is trailing other industries such as telecoms and semiconductors, where regulations have been introduced in Europe and the U.S. to mitigate China’s dominance.

Security analysts say this is partly because decisions about whether to secure energy infrastructure are mostly dictated by the size of any installation.

Household solar or battery storage systems fall below thresholds where security requirements typically kick-in, they said, despite now contributing a significant share of power on many Western grids.

NATO, the 32-country Western security alliance, said China’s efforts to control member states’ critical infrastructure – including inverters – were intensifying.

“We must identify strategic dependencies and take steps to reduce them,” said a NATO official.

** Article originally published on www.reuters.com**

The South African Police Service’s (SAPS) latest crime statistics show that household robberies are still a prominent challenge in the country, and rooftop solar panels are one of the main targets for criminals.

King Price told MyBroadband that homeowners should take certain precautions to protect their solar panels from theft, including upgrading perimeter security and using reputable security companies.

The SAPS’s crime statistics show that 34,075 home burglaries were reported between April and June 2024, nearly 380 per day.

The rising theft of solar panels and their components follows South Africa’s load-shedding crisis, with 2023 being the worst year of load-shedding in history.

Due to the frequent and intense load-shedding last year, many homeowners installed rooftop solar systems to reduce their reliance on Eskom.

The ongoing energy crisis and South Africa’s economic challenges have led to criminals targeting valuable equipment.

According to King Price client experience partner Wynand van Vuuren, homeowners should prioritise upgrading their perimeter security, securing their tools, and using tamper-resistant hardware.

“One of the most effective deterrents against solar panel theft is proper security. Installing sturdy fencing or walls, electric fencing, beams, and motion-sensor lighting can make it much harder for thieves to access anything on your property,” he said.

“Motion-sensitive cameras are also a great option, as they can alert you in real-time if there’s suspicious activity near your home.”

He explained that opportunistic criminals will use a homeowner’s tools to access their solar panels if they aren’t well secured.

“Don’t give criminals easy access to the tools they need to steal your solar panels. Lock away ladders, garden equipment, and any other items that could help them reach your rooftop installation,” said Van Vuuren.

He added that homeowners can also ask installers to use bolts and fasteners that are difficult to remove when installing their solar system.

Van Vuuren said integrating solar systems with a broader home security plan by working with a reputable security company to combine alarms, camera systems, and physical barriers was a good move.

Customers are also advised to keep their batteries and inverters securely locked away in hard-to-unlock enclosures.

“Even with the best security measures in place, it’s essential to ensure your solar installation is covered by insurance,” said Van Vuuren.

“The good news is that your losses are likely covered if your solar system is installed by a certified electrician who issues a certificate of compliance (COC), and you’ve insured it properly.”

He added that it’s critical that homeowners inform their insurers of their solar installation and provide the required documents.

“You’ll also need to make sure that the insured value for your buildings is updated to include the system,” he said.

Booming black market

The rapid uptake of solar power solutions in South Africa last year, combined with the theft of components, has facilitated a booming black market trade for entire solar panels and the scrap value of their parts.

This is according to Solarise Africa co-founder and COO Sakkie van Wijk, who warned in July 2023 that South Africa’s booming solar power market has started to attract crooks.

He explained that Solarise Africa had observed dodgy transactions involving several supply chain layers that added markups and kickbacks. This resulted in inflated project costs and problematic installations.

“We’ve even found large deals that were concluded with mere handshakes and absolutely no paperwork — no scope, so service level agreements, no system specifications — this is typically at least double the actual cost,” said Van Wijk.

“We urge everyone in the process of adopting solar to scrutinise every aspect of the deal.”

In February 2023, South African security giant Fidelity ADT warned of rising solar panel theft rise in the country.

Fidelity ADT head of marketing and communications, Charnel Hattingh, said the company had observed growing appeal among criminals towards backup energy products.

She added that the company had received several reports of solar panels being stolen in the space of a few weeks while homeowners were at work.

In addition to Van Vuuren’s recommendations, Hattingh said homeowners should aim to keep their properties well-lit at all times.

Source : https://mybroadband.co.za/news/

Zimbabwe hopes to achieve the high economic growth rates needed to move toward upper middle-income status by 2030, but to achieve this it will be critical to realize stable and reliable electricity access, according to the latest Zimbabwe Economic Update (ZEU). Zimbabwe’s power shortages are estimated to cost the country a total of 6.1% of GDP per year, comprising 2.3% of GDP in generation inefficiencies and excessive network losses and 3.8% of GDP on the downstream costs of unreliable energy.

Despite some recent achievements, Zimbabwe’s electricity sector still faces major challenges. The country still suffers from significant power deficits. In 2020, the available generation capacity was 1,585 MW compared with a peak demand of 1,900 MW, forcing power outages of 12–14 hours a day. While the government commissioned an additional 600 MW at the Hwange power station in 2023, installed capacity is still insufficient to meet demand, and rolling blackouts significantly burden Zimbabwe’s economic growth and competitiveness. The pace of rural electrification has slowed down. Between 2014 and 2020, overall energy access expanded from 32 to 53%, driven by a rapid rise in access in rural areas (from 8 up to 37%).

“The electricity deficits have been weighing on the economy, particularly in mining, by reducing the margins of existing operations and on the feasibility evaluations for expansions and new projects. The shortages also affect the agriculture and agro-processing sectors by undermining irrigation, cold chain, and storage facilities. Tourism is also affected by the disruption of essential services. These effects translate into lower economic growth and household incomes,” says Victor Steenbergen, Senior Country Economist for the World Bank in Zimbabwe,.

Peak electricity demand is projected to grow substantially, and achieving universal electricity access will require large investments, especially in solar power and grid expansion. Medium-term World Bank projections suggest that electricity demand will grow from 1,950 MW in 2022 to 5,177 MW by 2030, driven primarily by increasing demand from the mining and agriculture sectors. Achieving universal access by 2030 will require annual connections to increase from 25,000 in 2020 to about 537,000 annually.

“Estimates for least-cost generation expansion indicate that, in the short-to-medium term (2024–26), utility-scale home solar systems would be the fastest units to provide additional capacity, adding more than 1,500 MW that would ensure the system can meet growing demand,” says Joel Maweni, Energy Consultant and co-author of the Zimbabwe Economic Update.

Subsequently, generation expansion efforts would comprise gas power plants, hydropower, and more solar. The associated grid network expansion to 2030 is estimated to cost $4.4 billion. While the government is planning to expand electricity access through various sources, it remains unclear how the investment needed will be financed. The biggest planned increase in electricity supply comes from the Batoka Gorge Project along the border with Zambia (1,200 MW for Zimbabwe) projected for completion after 2034, and the Devil’s Gorge (1,200 MW) to be completed by 2040.

“Financing electricity expansion from domestic resources alone will be challenging, so there is an urgent need to involve more private investors and the international development community,” says Christopher Saunders, World Bank Senior Energy Specialist.

The ZEU provides some recommendations to help attain the government’s ambitious targets to achieve reliable and universal energy access by 2030:

  1. Develop an energy roadmap covering structural, policy, and utility reforms to achieve sustainable financial viability and affordable and reliable universal access to electricity for economic and social development.
  2. Strengthen the financial performance of the power sector through a policy of cost-reflective tariffs, cross-subsidized tariffs for vulnerable consumers, a plan to improve the efficiency of power companies and loss reduction, and a mechanism to restructure power companies’ legacy debt.
  3. Strengthen the technical planning and institutional coordination for power system expansion planning, implementation, and monitoring at the Ministry of Energy and Power Development level.
  4. Promote private energy sector investments by streamlining regulations for small-scale energy investments, and improved coordination across regulatory agencies to ensure consistent, light-handed regulatory approaches and enforcement across all energy investment projects.

The ZEU finds that Zimbabwe’s interconnected problems of electricity supply and access are ultimately driven by three underlying issues: weak financial performance of energy companies, insufficient central planning and coordination, and limited private sector participation. The weak financial state of Zimbabwe’s electricity companies is the most significant issue driving the country’s power supply deficits and slowing the expansion of universal access to electricity services. Energy tariffs do not reflect the financial costs of energy generation and distribution, leading to significant losses for power companies. The inefficiencies of the utility companies complicate this.

High debt servicing costs also burden energy companies. Insufficient revenues and high debt lead to cashflow shortages, which in turn constrain the companies from investing in new generation, transmission, and distribution assets, including in access expansion; attracting private sector investment and commercial financing for the sector’s investment plan; adequately maintaining existing assets; and forcing them to import power from neighboring countries to satisfy electricity demand consistently

A new Dutch home battery has a new twist on old technology: gel lead-acid batteries, for safe operation.

SS4U, a new company from parent TSS4U, a Dutch off-grid solar specialist and engineering firm, has launched a new battery designed for residential use. It is based on what’s old-is-new-again technology: lead-acid, with a twist.

The battery is a gel lead-acid implementation, developed in collaboration with VDL Groep, a diversified Dutch manufacturer in energy, mobility, tech, and more. It features an integrated charging system designed by ESS4U, which optimizes battery life and performance.

A Qurmit system can store 17.6 kWh of energy, discharging at 2.4 kW and charging at 2 kW. The downside is the weight: the system weighs 550kg, versus a more common home battery, such as the Tesla Powerwall 3, for example, which stores 13.5 kWh and weighs 130kg, using lithium iron phosphate (LFP) chemistry.

Still, the advantages of the Qurmit are that the batteries operate between -40 C to 55 C, beating LFP batteries at the low and high end, have no such thermal runaway or fire risk, and components are sourced entirely from Europe, claims the company, and made in Eindhoven.

In addition, recycling is far simpler, and the system can be used indoors and outdoors with an IP44 rating. The company claims a lifespan of 20 years.

Dop Brzesowsky, Managing Director at ESS4U, said: “We have many years of experience in using gel technology for large industrial off-grid solar energy projects. After thorough research and an extensive test period, we are now at the point where we can offer this fire-safe technology in the form of a home battery. The battery cells of the Qurmit consist of 50% recycled material and the entire home battery is recyclable for 95% at the end of its life.”

Brzesowsky continued: “Because our Qurmit home battery is fireproof, we also solve the insurance problem for small businesses that want to purchase a (home) battery. Their insurance often does not cover damage caused by home batteries based on lithium-ion technology, unless specific additional measures are taken, such as fire- and explosion-proof spaces.”

The company told Netherlands-based media that it aims to offer a 90 kVA system storing 740 kWh of energy for the commercial and industrial segment.

So far, installers offering the home battery are located in the Netherlands only.

Stricter regulations and better consumer awareness could be the answer, but slow legislation remains a stumbling block

Pardon Mahuntse has a deep understanding of climate change. He is well aware of the harsh reality facing the arid part of Zimbabwe he calls home, which has been getting even drier. So every time the 66 year old sees the huge solar photovoltaic panel sitting idle in his home, he chokes with anger.

The retired school teacher from Chikombedzi in the rural south-east of the country bought the panel for USD 350 in 2016 from an informal trader. He thought it would be perfect for powering a pump to irrigate the vegetables he has been growing: a project he anticipated would generate income to support a blissful retirement. Mahuntse scraped together hard-earned savings to invest in the solar panel, along with a battery, water pump and other accessories.    

However, his dream project floundered when he discovered that only a small section of the panel was genuine. The rest was just paint and glass.

Like Mahuntse, individuals and communities across the African continent are adapting to climate change by adopting practices that mitigate its effects. These include irrigation, renewable-power generation, and conservation farming. Such practices rely on equipment like solar panels, batteries, inverters, water pumps, and lighting systems.

These green-energy products can spearhead the energy transition, but progress is being hampered by unscrupulous suppliers selling low-quality imitations and outright fakes. In Zimbabwe, both low-quality and defective products are entering the country legally and illegally.

Rectifying the issue is a pressing concern given the southern African country’s unreliable national grid and low rate of electricity access. However, new laws and standards to tighten up the quality of imports have been stuck at the draft stage for years. Though efforts are being made to train solar installers in distinguishing between quality and inferior products, experts tell Dialogue Earth that stricter customs enforcement, as well as public-awareness campaigns, are sorely needed.

A huge market

On Harare’s bustling streets, where Mahuntse acquired his equipment, informal traders hawk their wares. Here, prices are undeniably lower and bargaining is practically an art form. But with warranties being an alien concept, these bargains carry big risks.

The sales pitch presented to Mahuntse was appealing: a hefty 450-watt capacity. But in reality, the solar panel had less than 100 watts, he tells Dialogue Earth.

The battery also fell far short of its promised capacity. “The 200 [amp hour] gel battery could be charged to full, only for the charge to drop within a few hours, even without being used,” he says. With the pump, “not once did it reach its rated output of 1,400 litres per hour”, he notes. “In less than a month, it had broken down.”

The influx of poor-quality products into Zimbabwe can be traced to when the country adopted a Look East policy in 2003, says Rosemary Mpofu, executive director of the Consumer Council of Zimbabwe (CCZ). The policy was introduced to mitigate economic impacts from Western sanctions imposed on Zimbabwe.

“Ordinary consumers have a tendency of considering pricing over quality… Some of the products are imitations, counterfeits and of questionable quality,” Mpofu tells Dialogue Earth. This includes solar-photovoltaic products.     

Phillip December, an electronics technician in Harare with over two decades of experience, has witnessed the full spectrum of green technology in the capital.

“Most of these green energy products are either of very poor quality or are plain fakes,” he notes.

Deceptive labelling, he says, is just the tip of the iceberg. “Some products don’t just come with misleading labels, but also their sizes are usually falsified,” he explains.

“From phone batteries to power banks, all the way up to domestic and industrial solar units, it’s commonplace to find these things stuffed with sand, glass, or some other cheap, weighty filler,” he explains.

Tom Herud, a hardware and electrical goods dealer based in downtown Harare, oversees 12 shops, and imports at least four shipping containers of products from China monthly. He says that about a third of his products are solar equipment. “China has all standards of products for all markets, so I import what I know can sell in the market that I serve,” he tells Dialogue Earth.

“We get these products very cheap there and we also sell them very cheap here because there is a huge market for them,” says Herud. Fakes find a place in the market, he adds.

At his workshop, Herud has a team of three technicians who specialise in repairing malfunctioning goods. He says that, of the solar equipment he sells, about 20% is returned. While he only imports from China, similar products come from India, Dubai, Pakistan and Indonesia, he adds.

To reduce the number of poor-quality products distributed, Mpofu says there is a need to curb smuggling at ports of entry and to conduct consumer-awareness campaigns about adopting smart shopping trends. “It should be a holistic approach by all sectors involved,” she notes.

Protecting consumers

Back in 2015, Zimbabwe’s Energy Regulatory Authority (ZERA) announced plans to set up a laboratory to test solar equipment entering the domestic market. The lab was supposed to be a collaboration with the Standards Association of Zimbabwe.   

Nearly a decade on, the lab is “yet to be procured by the authority,” says ZERA’s chief executive officer Edington Mazambani.       

Also in 2015, ZERA announced it would draft minimum-quality standards for importers and retailers of solar equipment. So far, these regulations have not passed the draft stage. In the same year, the government appointed certification company Bureau Veritas to carry out pre-shipment inspections of certain products, including electrical goods, to ensure they are up to scratch. However, a 2019 report on this programme by Zimbabwe’s auditor-general Mildred Chiri revealed “shortcomings” that resulted in the bulk of imports escaping scrutiny.

“The programme did not have critical provisions that could help in combating [the] influx of substandard goods,” the report stated.

“The fact that most of the goods were not being checked for quality … increased the risk of substandard goods finding their way into the country,” it added.

Sub-standard products continue to proliferate in the market due to unscrupulous traders capitalising on the heightened demand for solar equipment and exploiting buyers’ inadequate understanding. This is despite Zimbabwe having passed a Consumer Protection Act in 2019 to defend consumers from such suppliers.

To try and close existing knowledge gaps in the meantime, ZERA has started nationwide campaigns to train technicians in solar-system design and installation, in partnership with the Scientific and Industrial Research and Development Centre and the Harare Institute of Technology (HIT).

HIT engineer Emmanuel Ndala says the short course helps trainees identify counterfeits and poor-quality products.

Mahuntse’s veg-growing project was finally able to take off when he sold two of his six cattle to purchase better quality products from neighbouring South Africa.

As Zimbabwe and the broader southern African region face a continued power crisis and rationing due to droughts and ageing infrastructure, Mahuntse hopes regulation, inspection, awareness and import controls all work together to keep shoddy solar products out of the market.

“Experience like mine slows down the uptake of solar … perpetuating the current energy poverty,” he said.

Zimbabwe has approved a $45 million fund to support renewable energy solutions.

Local media outlets have reported that the investment includes $10 million from the United Nations Sustainable Development Goals (SDG) Fund, alongside an additional $35 million from the government of Zimbabwe and local partners such as the Infrastructure Development Bank of Zimbabwe and Old Mutual Investment Group.

The fund – which has been developed by Unesco, UNWOMEN and the United Nations Development Programme, alongside the government of Zimbabwe – is expected to largely focus on leveraging private investments.

UN Resident and Humanitarian Coordinator Edward Kallon said at Zimbabwe’s recent 5th International Renewable Energy Conference and Expo 2024 that the $45 million investment “signifies a concrete commitment to driving sustainable development and progress in our nation … By promoting the adoption of renewable energy sources, the United Nations supports the Government of Zimbabwe in mitigating climate change, improving energy access, and driving socio-economic progress.”

The government has also given the green light to 10 independent power producer (IPP) projects to start generating electricity within the next two years. The projects have a combined capacity of 271 MW and include six solar installations: the 10 MW Mutorashanga Indo Africa Solar plant, the 5.5 MW Guruve Solar array, the 50 MW De Green Rhino Solar plant, the 10 MW Equinox Solar project, the 10.5 MW Murombedzi Solar array, and the 30 MW Energywise Vungu Solar project.

Zimbabwe’s focus on renewables comes as it attempts to lessen its reliance on energy imports and improve access to electricity, as World Bank data shows that just 49% of the country had access in 2021. The country still faces significant power deficits, which contribute to regular power outages. A Zimbabwe Economic Update published by the World Bank in December said that the weak financial performance of energy companies, insufficient central planning, and limited private sector participation have been exacerbating problems with electricity supply and access.

Zimbabwe President Emmerson Mnangagwa also said last week that the country is “ready to welcome more investors and partners to take up opportunities to promote new energy technologies and smart off-grid systems across the country … Our statistics reflect that Zimbabwe is making steady progress in stabilising and increasing total energy output. However, more work must be done to ensure consistent access to clean energy across our provinces, including in rural communities.”

At the end of 2022, the government said it would expedite the commissioning of 27 solar IPP installations at a total cost of around $1 billion. Plans for Zimbabwe’s first utility-scale green hydrogen power plant, with 178 GWh of expected annual electricity production, were finalized in March 2023.

According to the International Renewable Energy Agency, Zimbabwe had deployed 41 MW of solar by the end of 2022.

By: PATRICK JOWETThttps://www.pv-magazine.com/

With a rising focus on solar energy as a sustainable alternative, Zimbabwe’s energy environment has undergone a considerable transition. This transformation has not, however, been without difficulties. A closer examination of the causes of the challenges the solar industry is facing as the nation works to harness the power of the sun finds a complex interplay of economic, infrastructural, and policy-related problems.

Like many other countries, Zimbabwe is aware of the potential of solar energy as a sustainable and clean source of energy. Solar energy seems like a perfect choice for a nation struggling with energy shortages and environmental issues because it receives enough of sunlight throughout the year. There is a lot of interest in solar projects due to the promise of decreasing greenhouse gas emissions and decreased reliance on fossil fuels.

Despite the promise, it has not been an easy transition from darkness to light. The high upfront cost involved with installing solar infrastructure is one of the main obstacles. Although the cost of solar panels and related technology has decreased over time, the initial outlay is still a substantial barrier for both homes and businesses. Securing funding for solar installations can be difficult in a nation where economic hardship is common.

Additionally, the development of the solar business has been hampered by the absence of a thorough and reliable regulatory structure. Investors and developers may be put off by inconsistent policies and frequently changing regulations, which can obstruct long-term commitment and planning. For the industry to prosper and inspire confidence in both domestic and foreign investors, a transparent and well-defined regulatory environment is essential.

The condition of the electrical grid is another essential element. Although solar energy offers a decentralized solution, integrating renewable energy sources into the current grid infrastructure is crucial. Due to underinvestment and maintenance concerns, Zimbabwe’s electricity grid has experienced frequent blackouts and unreliable power delivery. The integration of solar electricity into such an unstable grid presents technical difficulties that must be resolved for the sector to grow.

In addition, problems with knowledge and skill gaps have emerged. A trained workforce is required for designing, installing, and maintaining solar systems if the solar business is to thrive. To give people the skills they need to advance the industry, training programmes and educational activities are necessary.

The solar business in Zimbabwe faces some challenges, but they are not insurmountable. Through a number of programmes and regulations as of 2021, the government has demonstrated a growing commitment to renewable energy. These include the Rural Electrification Master Plan and the National Renewable Energy Policy, both of which highlight the importance of solar energy in the nation’s energy mix. Such policy frameworks set the groundwork for a climate that is more favorable for the growth of the solar industry.

The involvement of the corporate sector is also proving to be a glimmer of optimism. International and domestic businesses are starting to look into joint ventures and investment opportunities in the solar industry. Increased competition and cooperation will probably spur innovation, cut costs, and boost the industry’s overall growth.

By 2024, a more lively environment may be in store for Zimbabwe’s solar industry, according to future projections. Significant progress might be made as a result of the interaction of encouraging regulations, more private sector involvement, and rising public understanding of solar energy’s advantages. Solar panels may become even more cost-effective and efficient as technology advances, increasing the investment’s appeal to a wider spectrum of customers.

In conclusion, Zimbabwe’s transition from solar energy’s darkness to light is characterized by both opportunities and obstacles. Given the nation’s solar resources and the global shift towards cleaner energy sources, the industry’s development potential is apparent. Zimbabwe can create the conditions for a robust solar business by tackling major challenges such legislative inconsistency, grid reliability, and financial constraints. The country can fully use solar energy and shine brilliantly on the road to a sustainable energy future with the correct legislation, investments, and community involvement.

By Mohan Guptahttps://solarquarter.com/