Oct 27, 2023

The Best Solar Inverter for Efficient Energy Conversion


If you're looking for an eco-friendly alternative to traditional electricity sources, solar energy is an excellent option to consider. However, choosing the best solar inverter plays a major role in maximizing the efficiency of your solar power system. This essential device is responsible for converting the direct current (DC) generated by PV solar panels into an alternating current (AC) that can power your home's appliances. In this article, we'll dive into solar inverters for a better knowledge, review some of the top options available, and provide beneficial tips for you to select the ideal solar inverter for your energy needs.

The Best Solar Inverter for Efficient Energy Conversion

Get to Know the Solar Inverter

A solar inverter is a critical component of a solar power system that converts direct current (DC) electricity generated by solar panels into alternating current (AC) electricity, which can be used by household appliances. Without a solar inverter, the energy harnessed by solar panels would be unusable in most residential and commercial applications. Selecting the best solar PV inverter for your home is vital in maximizing the performance and efficiency of your solar installation.

Different Types of Solar Inverters

1. String Inverters

String inverters connect a set of solar panels (referred to as a string) to a single inverter that converts the DC electricity from these panels within the string into AC power we use. When a certain panel in the string experiences partial shading, blockage, or maintenance issues, the performance and efficiency of the entire string could be compromised. To mitigate this issue, many homeowners prefer installing DC power optimizers with their string inverters.

DC power optimizers are installed on each panel individually to manage and maximize the performance of each panel in the string separately. This ensures that if one panel encounters issues, other panels within the system continue to perform normally. It is highly recommended to have optimizers laid when your rooftop is partially shaded or not optimally angled to capture sunlight.

2. Microinverters

Unlike the string inverter setup, microinverters are installed on each individual solar panel within the array. This allows them to operate at the module level and makes them suitable for complex solar installations, partially shaded roofs, or those with suboptimal angles. Moreover, microinverters facilitate easier system expansion.

Because they are mounted on the roof along with the solar panels, microinverters are typically covered under longer warranties compared to string inverters – usually lasting 25 years. However, since they are located on the roof, microinverters can be harder to repair or replace.

3. Hybrid Inverters

Hybrid inverters are a versatile option that can handle inputs from both solar panels and energy storage systems. This enables them to not only convert the DC electricity from PV solar panels into AC electricity for home use, but also manage energy flow between the PV solar panels, energy storage, and the grid.

As the demand for energy storage increases, hybrid inverters are gaining popularity for their capacity to incorporate solar energy production and storage within a single inverter. This consolidated solution can save space and reduce installation complexity compared to separate inverters for solar production and battery storage.

Best Solar Inverters

1. SUN2000-M5

At FusionSolar, our SUN2000-20KTL-M5 solar inverter is a testament to advanced energy transformation technology. Engineered for excellence, it boasts a max efficiency of 98.4%. With a three-phase grid connection and a rated output power that peaks at an impressive 25,000 W, it stands at the forefront of solar innovation.

Among its standout features is our proprietary Digital Turbo Technology, ensuring unmatched performance and longevity. The Smart IV Curve Diagnosis not only simplifies maintenance but is complemented by the AFCI Active Arcing Protection, further enhancing active safety measures. For those keen on maximizing returns, our inverter promises higher yields, delivering up to 30% more energy with the inclusion of an optimizer.

Communication also matters, and our SUN2000-20KTL-M5 does not disappoint. It supports a wide range of communication protocols, including WLAN, Fast Ethernet, and 4G, ensuring you're always connected. And, to wrap it all up, its compact, user-friendly design not only ensures seamless integration but also significantly reduces installation costs, providing our users with the best of both worlds.

The Best Solar Inverter for Efficient Energy Conversion

2. SUN2000-L1

What is the best solar inverter to buy? We're proud to present the SUN2000-L1, our cutting-edge single-phase residential solar inverter. With a remarkable max efficiency of 98.6%, this intelligent energy controller seamlessly integrates with our Smart PV Optimizer. This compatibility allows homeowners to utilize more rooftop modules, resulting in up to 30% higher energy yields.

Safety and efficiency keep abreast with each other when our SUN2000-L1 is featured with AFCI protection to eliminate potential fire hazards for personal and asset safety. Furthermore, its battery-ready, plug-and-play design ensures a hassle-free experience for users. When it comes to communication, it effortlessly interfaces through RS485 and WLAN. For those seeking more versatile connectivity options, it supports optional Ethernet as well as 4G/3G/2G.

Impressive specifications continue with a 6 kW output power and a max output current of 27.3 A. Yet, what truly sets our inverter apart is its design. With a compact IP65-rated enclosure, it's built to withstand various environmental conditions, all while weighing a mere 12 kg. At FusionSolar, we remain committed to innovating for a brighter, greener future.

The Best Solar Inverter for Efficient Energy Conversion

3. SUN2000-M2 (High Current Version)

The SUN2000-M2 (High Current Version) inverter is meticulously designed to provide optimal energy efficiency for PV systems, whether they're rooftop installations or ground arrays. Achieving a striking maximum efficiency of 98.65%, our inverter is engineered to accommodate high input currents on the DC side, ensuring seamless adaptability with energy storage systems.

Leveraging Intelligent power management, the SUN2000-M2 guarantees impeccable safety by robustly safeguarding against electric arcs while offering pinpoint detection accuracy. It's built to deliver with an input voltage range that spans from 160-950V, ensuring flexibility across diverse operational scenarios. Furthermore, features like leakage current protection and compatibility with a three-phase grid, exemplify our commitment to uncompromised performance and reliability.

But our focus isn't just on efficiency and performance. Ease of installation and user-centric design remains at the core of our ethos. Our SUN2000-M2 comes equipped with built-in protections and offers touch-free operation, and to further instill confidence in our users, we back it with a 10-year warranty. At FusionSolar, we continuously strive for innovation, always pushing the boundaries of what's possible in solar energy solutions.

The Best Solar Inverter for Efficient Energy Conversion

4. SUN2000-M1 (High Current Version)

The award-winning SUN2000-M1 (High Current Version) solar inverter, weighing in at just 17kg, this compact, three-phase marvel is impeccably designed for rooftop installations. Always at the forefront of innovation, our SUN2000-M1 is embedded with groundbreaking features, including Intelligent AFCI, integrated PID recovery, and comprehensive AC/DC overvoltage protection.

We believe in the durability and longevity of our products, and as a testament to that confidence, we provide a 10-year warranty on our inverter, which can be extended up to 20 years. Designed with flexibility in mind, our battery-ready solution ensures effortless commissioning through a dedicated app. Performance is further exemplified with an AC output and battery charging capacity that stands at 5kW each, ensuring optimized energy management. Moreover, our direct meter connection facilitates 24-hour energy management, giving users an unprecedented insight into their energy usage.

But it's not just about power and performance. With the SUN2000-M1, we ensure your environment remains peaceful. Thanks to its passive cooling technology, it operates silently at less than 29dB. Trust in our SUN2000-M1 and embrace the epitome of solar inverter technology. With us, you're not just choosing an inverter; you're opting for a future of sustainable, efficient, and quiet energy solutions.

The Best Solar Inverter for Efficient Energy Conversion

Tips to Choose the Best Solar Inverter

Choosing the best solar inverter is crucial for maximizing the efficiency of your solar power system. Here are some tips to help you make an informed choice:

1. Understand Your Needs: Begin by calculating the energy needs of your home or business. For instance, a typical household might need a 5kW system, but commercial setups could require 20kW or more.

2. Efficiency Matters: Always check the efficiency of the inverter. Ideally, aim for inverters that have an efficiency of 98% or higher.

3. Check Compatibility: Ensure the inverter supports input voltages in the range of your solar panels, often between 160-950V.

4. Look for Multiple MPPTs: Inverters with multiple Maximum Power Point Trackers (MPPTs) can optimize outputs better. Consider inverters with at least 2 or more MPPTs for enhanced performance.

5. Safety Features: Choose inverters with safety protections like anti-islanding and arc fault protection. A good threshold for leakage current protection might be below 300mA.

6. Expandability: Consider inverters that can handle an additional 25% capacity, giving you room to expand your solar system in the future.

7. Warranty Duration: Ideally, opt for inverters that offer a 10-year warranty, with options to extend up to 20 years.

8. Communication Features: Modern inverters should offer communication via RS485, WLAN, and optionally, 4G/3G/2G for versatile management.

9. Weatherproofing: Aim for inverters with an IP65 rating or higher, ensuring durability in various weather conditions.

10. Noise Level: In residential areas, opt for inverters with a noise level below 30dB to ensure a quiet environment.


Selecting the best solar inverter comes down to assessing your specific needs and the product's reliability. With the proper solar inverter, you can harness the sun's power effectively, ensuring sustainable energy and reduced carbon emissions. By considering factors such as warranty, efficiency, and technology, you'll be well on your way to a greener, more energy-efficient house. Remember, your choice defines the efficacy of your solar solution, so choose wisely.


Here are some commonly asked queries about the best solar inverter.

What Can a 5000W Inverter Run?

A 5000W inverter can run many household appliances simultaneously. Depending on the power consumption of each device, these can include lights, fans, televisions, washers, and smaller air conditioning units. It can also power larger appliances like a refrigerator, microwave ovens, and small heaters, but these are likely to require the sole use of the inverter's capacity.

What Inverter Size Is Required to Power a House in South Africa?

Determining the appropriate inverter size depends on the total wattage of appliances and devices you aim to power rather than a specific geographic location. However, for an average-sized house in South Africa with standard appliances such as a fridge, lights, TV, and computer, an inverter around 5000W to 7000W should generally be sufficient. It's recommended to calculate the total power requirement of the appliances to get the most accurate size.

Can a Fridge Be Operated by a 1000W Inverter?

Yes, a fridge can be operated by a 1000W inverter. Most household refrigerators require between 300-800 watts of power to operate. However, starting a refrigerator can require 2-3 times the operating wattage. Thus, while a 1000W inverter may run a fridge, it's better to have a larger buffer to account for starting power and the power demands of other appliances.