Size for electricity use first, then check whether the target fits your roof.
Country defaults provide a starting point. Every assumption stays editable.
Use the kWh shown on a recent electricity bill, not the bill amount.
Enter the gross roof area available for solar. Choose square feet or square metres from the adjacent unit selector.
Choose the panel wattage used for the estimate. The panel area default updates with this selection.
Panel area is set from the selected panel wattage and can be overridden when you know the usable panel dimensions.
Receive one email with the current inputs, result, assumptions, and limitations. This does not request installer quotes or share your details with an installer network.
One transactional email. No account and no quote matching.
Optional manual review of the inputs you submit. No installation, quote, or engineering service is promised.