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Find last year’s electricity use on your bill — most Colorado homes land between 7,000 and 11,000 kWh. Then divide by what one panel makes in a year here.
The Denver number
A 430 W panel on a south-facing roof makes about 620 kWh a year along the Front Range. East or west roofs make about 15% less.
- 7,000 kWh a year: about 11–12 panels (the Starter kit plus one).
- 9,000 kWh: about 15 panels.
- With an EV: add five to six panels per daily commute.
Or skip the sum: send a bill and your address and an engineer emails a ready-to-checkout cart, usually the same working day.
