Solar cost
What affects the cost of solar?
Every home is different, so the most reliable way to know your price is to compare quotes. These are the main things that move it.
The main cost factors
System size
Larger systems cost more overall, though the cost per kW often falls as size increases.
Equipment choice
Panel and inverter brands, efficiency and warranties vary widely in price.
Roof type and access
Tile, tin, flat or multi-storey roofs affect installation time and the mounting hardware needed.
Electrical work
Older switchboards may need upgrading to meet current standards.
Incentives
Eligible systems can attract federal incentives, usually shown as a discount on the quote.
Battery readiness
A hybrid inverter can cost more upfront but make adding a battery later simpler.
Frequently asked questions
Why is one quote so much cheaper than another?
Usually because of equipment, system size, what's included, or warranty length. Compare the brands, models and inclusions listed in each quote before comparing the bottom line.
What size solar system do I need?
It depends on how much electricity you use, when you use it, your roof space and orientation, and whether you plan to add a battery or an EV. Installers size the system after looking at your bills and roof — which is why comparing a few quotes helps.
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