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What Size Solar System Do I Need?

At A2Z Solar, we understand that every house is different, and every households’ circumstances are different, so there are a number of factors to take into account when working out the best size solar power system for your home. Below we break down a few of the key factors we consider when providing you with a solar quote.

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UNDERSTANDING YOUR ELECTRICITY USAGE

This is perhaps the first thing to analyze when considering what size solar system you will need. A quick analysis on your past electricity usage will help us to determine what size system you will need to cover most or all of your electricity usage. 

Your energy consumption will appear on your electricity bills, shown in ‘kWh’ kiloWatt-hour – not to be confused with ‘kW’ kiloWatt (the measurement used when referring to a solar system). 

SOLAR INSTALLATION REQUIREMENTS.

Roof Space is another key factor when determining the best-sized solar system! Your roof space may dictate the number of panels and therefore the overall system size.

 Take into account any trees, chimneys, or antennas that may cause shading and affect system performance. If shade is cast on Solar PV panels it can significantly affect the production of the system, especially if you have a string inverter such as a Fronius Inverter. If shading is an issue, you can consider having micro-inverters installed, such as Enphase Micro-Inverters, as these help to keep system performance as high as possible even when shading is an issue. More on this in future blog posts where we will discuss different inverter types!  

Orientation of your solar panels is also important! Typically, in Australia, the North roof face is the ideal location for solar PV panels as it will typically give you a good spread of production throughout the day. However, North is not always possible and not always essential for your home. 

Having your solar panels split over the East and West roof faces can also be suitable for your home, especially if you have a significant amount of electricity consumption in the morning or afternoon. It may also help avoid shading from surrounding trees.

Your energy consumption will appear on your electricity bills, shown in ‘kWh’ kiloWatt-hour – not to be confused with ‘kW’ kiloWatt (the measurement used when referring to a solar system).