01
What it calculates
Estimated annual AC electricity is based on array capacity, a broad regional yield factor, orientation adjustment and shade adjustment. Indicative bill value separates assumed self-use from export.
02
What to edit
Use your proposed kWp, broad location, roof direction and shading. Replace the example import and export rates with your actual tariffs and test several self-use shares.
03
What to request later
Ask an installer for the site data, system losses, shading assessment, calculation method and assumptions supporting their written performance estimate. If you'd rather skip straight to that, our enquiry-referral form matches you with vetted, MCS-certified installers directly.