Best Solar Inverters 2021 | All the Top Solar Inverter Brands Ranked

Solar Inverters Buyers Guide

Best Solar Inverters 2021 | All the Top Solar Inverter Brands Ranked

Understanding the role of inverters in your home solar PV system is essential to calculating the performance, output, durability and cost of your solar panels. The vital role played by inverters is the conversion of DC electricity into usable AC electricity. An inverter can improve the overall efficiency and output of your solar panels, however they are also the system component most likely to fail in the first few years. Due to their capacity to improve your system and propensity to fail, it is important to examine the options, costs, warranties and performance of the different inverters available on the market today.

Solar Inverter Comparison

This solar inverter guide will help you to determine the best inverter efficiency for your home solar installations and battery systems. We will cover inverter warranties, inverter manufacturers and cost comparisons for each of the major brands. All inverters mentioned meet the Australian standard for renewable energy products and are compatible to be connected to the electricity grid.

Top 5 solar inverters in Australia | Compare all the major solar inverter brands


GoodWe has constructed both single and three-phased inverters throughout the years, and has installed over 16 GW worth of inverters in more than 80 countries worldwide. Although we are talking about how great their inverters are, they have meticulously worked throughout all phases of solar; such as commercial, residential, and even utility-scale systems.

They have offices in the UK, Germany, and even Australia – and their reputation of ranking within the Top 10 Best Solar Inverter manufacturers isn’t just for show. They have also been awarded the Top Brand PV Seal in Australia.

Their DNS Series inverters are amongst the most popular in Australia – it is a single-phase inverter that is compact, filled with great hardware and software. It was built primarily for Australians – as it was manufactured for durability and longevity. It has an IP65 rating for protection against water and dust.

If you’re looking for an inverter that can do it all – the GoodWe DNS Series inverters will check off all of those boxes. It’s also Wifi connectable and allows you to control the amount of energy that goes through your home as well. Another great benefit of having a GoodWe is that they can install both string and hybrid inverters – which means you can pair one up with an external energy storage system if you want to.

Additionally, they have 10, 15, and 20 year extended warranties. Take a deeper dive to Goodwe Product Review to know more about Goodwe inverters.


Solar Edge inverters are always ready to shine, and their prestige proceeds them. Established in 2006, their company has now expanded all across the globe, with offices in Germany, Italy, Japan, China, and even Israel. They’re located within the United States – but their name has reached worldwide acclaim.

Furthermore, Solar Edge has partnered with Tesla Motors to develop a PV storage system and backup power solution for the residential solar market. Their lovechild was the Tesla PowerWall – a mainstay for energy storage systems within the United States. Their awards include the 2016 Intersolar Award and the renowned 2018 Edison Award, both of which were awarded to their high-grade solar inverters.

What makes their solar inverters so special is the fact that they have a technology called the Maximum Power Point Tracker, which independently manages each solar module. This allows for the inverter to stay cool – and to only call upon the power needed amongst the panels, rather than straining the single-phase inversion unit. By also using a fixed-string chassis – they can ensure that their single-phase inverter will promote the highest efficiency at all times – regardless of the temperature or string length.

The main body itself uses HD-Wave Technology. The single-phase inverter serves as a filter for electricity and synthesizes clean sine waves. This allows for a tremendous reduction in the magnetics and heavy cooling elements. The HD-Wave technology gives you a whopping 99% efficiency, which will be a bigger ROI for you and your family.

The Solar Edge inverters come with a standard 12-year warranty but can be extended to 20-25 years.


If you’re looking to grow your home’s worth and the amount you can save on energy, SunGrow’s inverters are right for you.

Founded in 1997 by Professor Cao Renxian of Hefei University of Technology – SunGrow was originally invented to improve the energy supply in rural western China through the use of renewable energy resources.

From there, Renxian developed solar energy systems within western rural China that are still being used to this day. SunGrow is the world’s second-largest inverter manufacturer behind Huawei. They have a net worth of over 1.5 billion USD – and specialize in the manufacturing of power supply systems for wind, solar, and energy storage. If you’re looking for a trusted name in the game of solar inverters – you would be wise to choose SunGrow, a company that has been manufacturing solar inverters from the get-go.

The residential SG series of SunGrow’s solar inverters are amongst the most popular solar inverters in all of Australia. They are currently the second largest solar inverter sold by volume, with a great reputation for their quality and support.

The SG series is amongst the most lightweight of all the aforementioned solar inverters, second only to Solar Edge’s inverters. This lightweight body allows for it to maintain a great core temperature – which in turn gives a more efficient inversion of DC to AC energy.

They are also transformerless and even have WiFi communication integrated within their software.

Additionally, they have 10, 15, and 20 year extended warranties.


Known as one of the biggest solar icons in the world – SMA was established in 1981. Their inverters at the time were branded as Sunny Boy and Sunny Tripower and were above all else in terms of the solar inverter market.

In 2008, most Australian solar installers would say that SMA was the best choice for your solar inverter – and their string inverters were the best in the market. They are still a leader in the solar inverter industry and are continuing their innovative ways with some new technology. SMA is known for their reliability, and are known to last extremely long – especially during the initial years of the Australian solar boom.

All of SMA’s inverters are German-made and stems from the roots of German authenticity and engineering.

The Sunny Boy – AV series inverters are amongst the classics in terms of reliability and lightweight construction. The updated model of the Sunny Boy offers an efficient absorption of power and has been rated as one of the best quality solar string inverters in the world. They are compact, quiet, and durable. The WiFi communication it has is commonplace for all of its models, and you can control the inverter via Bluetooth or WiFi. It also comes with a great app, which allows for ease of use.

The Sunny Boy has a standard 12-year warranty and can extend to 20 years.

Price Comparison Table For Solar Inverters

Below we have provided a Solar Inverter Price Comparison Table to help you determine the right inverter for your budget and needs. The 6.6 kilowatt (kW) and the 9.9kW solar setups are the most common household systems. We have provided a starting price point for each of these systems with both the basic panel option or the premium panel. While the basic panels are cheaper, the premium panels offer a high efficiency which can result in a greater return on investment over the lifetime of the device.

Inverter6.6kW (basic panel)9.9kW (basic panel)6.6kW (premium panel)9.9kW (premium panel)
Solar Edge- Inverter price comparison$5,500 – $6,500$7,500 – $8,500$8,000 – $9,000$12,000 – $13,000
Fronious $4,750 – $5,750$6,750 – $7,750$7,750 – $8,750$11,000 – $12,000
SMA solar$5750 – $6750Unavailable$7250 – $8250Unavailable
Sungrow $5000 – $6000$8000 – $9000$6500 – $7500$9750 – $10750
Goodwe Solar Inverter$5000 – $6000Unavailable$6500 – $7500Unavailable
Growatt - Solar Inverter price comparison $5000 – $6000Unavailable$6500 – $7500Unavailable
Xsolar $5000 – $6000Unavailable$6500 – $7500Unavailable
Zever $5000 – $6000Unavailable$6500 – $7500Unavailable
Sofar Solar$4500 – $5500$6000 – $7000$6000 – $7000$8500 – $9500

Solar Inverter Price Comparison

From this table you can see that the cheapest inverter option is from Sofar, which offers inverters for a 6.6kW basic panel setup from $4,500 and $6,000 for a 9.9kW system. The top three manufacturers are from Israel, Austria and Germany respectfully. The rest of the list are Chinese companies.

The most expensive option is Solaredge, with prices starting at $7,000 for a 6.6kW basic setup and $10,500 for a 9.9kW. These also offer the best value for panel level monitoring, which can boost the efficiency of your panels. For this extra price you also get the best warranty option. Solaredge provide a 12 year warranty with a solid reputation – meaning you can rely on the manufacturers to back their warranty. Take a look at our Solar Inverter reviews.

Solar Inverter Guide | String Inverters, Micro Inverters & Optimisers

There are two main types of inverters: String Inverters and Micro Inverters.

String Inverters, also known as Central inverters, are a single box installed in your home which works as part of a series circuit with your solar panels. By connecting all of your solar panels together as a ‘string’ circuit, these inverters have the advantage of only needing one device for your whole home system. These are also the cheaper of the two inverters, making them a common choice for household solar setups. The best value string inverters are from Sofar.

Micro Inverters are much smaller and require multiple devices to work with your solar panels. Each panel requires its own micro inverter, as opposed to the central inverter which connect them all together in a circuit. While these inverters are more expensive, there are a number of advantages. If one inverter malfunctions or breaks, the rest of the system will continue to work as they are connected to different inverters. This mitigates the risk of inverter failure. Micro inverters are also able to optimise their voltage output for each of the panels, ensuring that you are yielding maximum output from your panels. String inverters, on the other hand, must adjust their voltage to the lowest voltage panel in the circuit.

Optimisers are an optional extra feature that can help to increase the efficiency and output of a String Inverter. Optimisers perform a similar function to Micro Inverters, monitoring the performance and voltage of each of your panels and adjusting the settings to ensure they are working at peak capacity.

The Cost of Extra Inverter Features

The options for inverters don’t stop there. There is no ‘one size fits all’ inverter, meaning that you can choose the inverter setup for your home solar system that suits your budget and solar energy requirements. There are a number of features that can be combined with your inverter to boost the efficiency and performance of your system. These options are great for those with shading issues on their roof, or for those looking to improve the output of their system and their return on investment.

FeatureExtra Cost
Double Storey$500 – $1500
Split Array$150 – $350
Switchboard Upgrade$800 – $1800
Optimisers$85 – $150
Monitoring Units/Export Limiters$350 – $1000
Tilt Kits$50 – $100
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