Solar generation planner

How the calculation works

• Array capacity in kW DC = module count × rated module watts ÷ 1,000.
• Annual generation = array capacity × entered final annual yield.
• Annual energy equivalence = generation ÷ annual household use × 100.

What the result assumes

• Starting values are illustrative inputs, not a measured roof assessment or a regional production forecast.
• The final yield must already account for the chosen model’s orientation, shade, equipment and losses. Do not subtract the same losses twice.
• Annual energy equivalence compares yearly totals. It does not establish hourly matching, on-site use or bill reduction.
• This model does not measure a roof, select equipment, check electrical capacity or approve micro-generation eligibility.

Check before using the result

• Use a whole number of modules and positive annual yield and electricity use.
• Generation above annual household use needs a sizing and eligibility review with the actual distributor.

Carry all inputs and results into an editable solar brief, with the source of each input labelled.