Energy
Solar Panel Calculator
Estimate the daily, monthly and annual energy production of a solar photovoltaic system.
These calculators provide estimates and educational results. Always verify critical engineering calculations against applicable standards and qualified professional review.
Formula
E = P × H × PR
Daily energy production equals panel power times peak sun hours times the performance ratio.
Variables
| Symbol | Variable | Unit | Description |
|---|---|---|---|
| E | Energy | kWh/day | Daily energy output |
| P | Panel Power | kW | Total installed panel power |
| H | Peak Sun Hours | h/day | Average peak sun hours per day |
| PR | Performance Ratio | - | System performance ratio (0.7-0.8) |