Size is based on your electricity usage, roof space and sunlight — matched so the system covers most of your consumption.
BySolarBazaar TeamThe right size depends on three things: how much electricity you use (check your bills in units/kWh), how much unshaded roof space you have, and how much sunlight your location gets.
As a rule of thumb, you size the system so its yearly generation covers most of your yearly consumption. Oversizing wastes money on power you export cheaply; undersizing leaves you buying more from the grid.
Your roof area sets a practical limit — each kilowatt of panels needs roughly 5–7 m². Use our solar calculator with your actual usage to get a recommended kW size before requesting quotes.
This is general guidance — figures vary by location, tariff, equipment and installer. Always confirm details for your own home before deciding.
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