Solar panel system size calculator
Estimate the solar system size (in kW) that would suit your household based on your electricity usage and roof sun exposure. Use this before getting quotes to compare like-for-like proposals.
This is the approximate kW capacity that would cover your typical daily usage, based on Perth's average sun hours.
Compare actual quotes for this projectThis is an estimate only; a site assessment confirms the exact system size for your roof.
When you submit an enquiry through our forms, we may share it with partner providers who can do the work, and we may receive a referral fee. Our rankings and scores come from our published method only and are never affected by referral fees.
Get quotes from top-rated solar energy equipment suppliers
Ranked by our published rubric from recent Google reviews, weighted by relevance to this service (the same order as the category page).
Pool Heating Solutions WAGet a quote5.0(248) 94
Solar LyghtGet a quote5.0(193) 94
Every Battery BelmontGet a quote4.9(1231) 93
Dr Sparky ElectricalGet a quote4.9(197) 92
Fritts SolarGet a quote5.0(326) 92