What size solar system do I need and how to evaluate it?
Assess home electricity loads for solar system capacity
How many solar panels do I need?
If you have no space issues, buying more panels is a wise choice as they come cheaper. More panels will help you produce more power resulting in more offset on electric bills. As a result, the higher feed-in tariff will also save you more money and give you an excellent ROI value.
As an example, for the Ultimate Energy Australia 6.6 kW solar system size, you will need twenty 370W solar modules. Each module requires 1.7 m², and for t panels, you will need 31 m² of free space.
Is 6.6 kW solar enough?
A 1-kW solar system produces around 4 kWh of energy on a sunny day whilst the daily usage of an average Australian house is around 20 kWh. This means the 6.6kW capacity solar system that Ultimate Energy Australia offers is more than enough for an average home.
The solar system size impacts its upfront cost significantly. But in the long run, solar systems with more power output offer more savings and higher ROI. As you go for more power output in solar, you pay for per kilowatt cost reduces significantly.
With the declining prices of solar PVs and lucrative government incentives, you can save up to one-third of your upfront cost. To learn more about solar energy’s rebates and financial benefits, read our article on Solar Rebate NSW 2021.
To wrap things up, What size solar system do I need? You should go for a 5-kW plus solar system capacity for your home. A 6.6 kW solar system bundled with a 5-kW inverter is an excellent choice and a future proof option.