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Which type of solar inverter should I buy?

The solar inverter is the heart of the solar system. It is one of the key components of a solar system and when it fails, the entire system comes down. Since it works so hard, the solar inverter is also the first component to wear out. The average lifespan of the best solar inverters in Australia is 10 years.

Investing in the best solar panels in Australia alone is not enough unless you have a powerful inverter backing your system. So when you are going through the best solar quotes in Australia and the best solar companies available here, do not only consider the best quality solar panels and the best solar panels cost, but also give enough importance to choosing the best solar inverter from the top 10 solar inverters in Australia.

Getting the right inverter will ensure the smooth functioning and longevity of your system for decades.

The function of a solar inverter

The solar energy generated by the panels on your roof can not be used as electricity directly. It is the solar inverter that converts solar energy to usable electricity. Inverters change the solar energy that your modules produce into electricity that powers your appliances.
The solar energy produced by the panels is in raw DC (direct current) form which is not how your home is wired. The inverter converts this energy to AC (alternating current) form which lights up your home and runs the appliances.

What inverter size is ideal for me?

You may ask – what size of solar inverter is best suited for my home? So generally, the inverter size must be similar to the DC rating of your solar panels. If you are installing a 6.6kw solar system in Australia, you can team it with a 6kw inverter or a 5kw inverter. And if you are going for a 10kw solar system in Australia, you could pair it with a 10kw and even an 8kw inverter. Undersizing the inverter leads to higher daily energy output. These undersized inverters will give peak production in the mornings and evenings resulting in fatter overall energy production.

What type of solar inverter should I choose?

When looking for the best solar inverter in Australia, you can choose from three types of inverters for your home:

1) String inverter

A string inverter also called a ‘central’ inverter is the traditional solar inverter. True to its name, it is used as one central inverter that supports all the panels of your solar system. If your roof does not have a shading issue and all the panels face the same direction, this type of inverter will give you great efficiency at a low cost.

Advantages of a string inverter

a) Inexpensive
b) Efficient where there is no shading issue
c) Efficient when panels face one direction

Disadvantages of a string inverter

a) Not favourable when panels are installed in multiple directions
b) Cannot monitor each panel individually
c) Overall output falls when one module is damaged or shaded

2) Microinverter

These are devices that are attached underneath each panel to convert their DC power to AC and supply to your home. Now this gives each module the ability to perform at its highest potential, free from the other panels. So, suppose there is shade falling on some panels at some part of the day, the panels free from shade will still perform at their best capacity.

They allow monitoring of the productivity of each panel separately which is why any issues can be detected early and repaired before it slows down the whole system.

Advantages of microinverters

a) Shade will not reduce the entire system’s output
b) Allows monitoring of each panel’s performance
c) Ideal when panels face multiple directions

Disadvantages of microinverters

a) Initial expense is high
b) Not ideal if all panels face the same direction
c) Not required where there is no shading issue

3) Power Optimizers

Power optimizers cost between string inverter and microinverter. Like microinverters, these are attached to the backside of each solar panel but they do not convert DC energy to AC electricity right there. They optimize the current and send it to a central inverter. Power optimizers are more efficient than string inverters as a weak performance from one panel does not impact the whole system’s output. However, these are most cost-efficient than microinverters.

Advantages of Power Optimizers

a) Higher efficiency than string inverter
b) More cost-efficient than microinverters
c) Allows individual panel monitoring

Disadvantages of Power Optimizers

a) Initial high expense
b) Not ideal if all panels face the same direction
c) Not required where there is no shading issue


Investing in a powerful solar inverter is crucial to ensure the longevity, smooth functioning, and hence success of your solar system in Australia. Do check the warranty of the inverter you choose to buy and the online solar reviews and testimonials for the best solar inverters in Australia to be confident that you are investing in the right brand.

Get in touch with Solar Power Nation for a free quote today!

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