How Many Solar Panels Do I Need?
A simple three-step formula to size a home solar system, with worked examples, a quick-reference table and the factors installers check before quoting.
Practical guides for homeowners thinking about solar: how big a system you need, what it costs per watt, how long panels last and how many years it takes to pay back. Start with our solar panel calculator, then check current solar panel cost and the payback period for your situation. Every figure is sourced and dated.
A simple three-step formula to size a home solar system, with worked examples, a quick-reference table and the factors installers check before quoting.