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.

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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