Solar panel output estimator
Annual kWh = panel kW × peak-sun-hr/day × 365 × system efficiency (≈0.77)
- Daily output
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- Monthly output
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- Annual output
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- Annual savings
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Peak-sun-hour reference — Phoenix 6.5, LA 5.5, Atlanta 4.7, Chicago 4.0, London 2.7, Berlin 2.9. Efficiency factor accounts for inverter, wiring, and panel temperature losses.
About this tool
Solar panel output estimator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Electrical & Electronics. Browse more Electrical & Electronics tools.