Solar Panel Calculator
Estimate solar energy output and system size needed.
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How It Works
Estimate solar energy output and system size needed. Enter your values and press Calculate for instant results with a full formula breakdown.
Formula
Panels = Daily kWh / (Sun x Panel kW)Quick Reference
Common calculations — results you can verify instantly.
30 kWh/day need, 5hr sun
30/(5×0.80)
7.5kW system needed
Average US home
30 kWh/day
6-10kW typical system
Single 400W panel
5hr sun, 80% eff
1.6 kWh/day
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