Solar Energy Production
Estimate production using entered peak sun hours and system losses.
Your numbers
Period energy
Sun hours are an input assumption, not a live local forecast. Shading, orientation and seasonal variation require site-specific modeling.
Scenario comparison
Up to three snapshots in this tab. Loading one replaces the current inputs.
Formula
Use E = Ph(1−l)d. P is peak array capacity in kW, h is average peak sun hours per day, l is system loss as a fraction, and d is days. Period energy E is in kWh.
Estimate production using entered peak sun hours and system losses.
Worked example
- Array peak capacity (kW)
- 5
- Average peak sun hours per day
- 4
- System losses (%)
- 20
- Days in period
- 30
- Period energy
- 480 kWh
- Average daily energy
- 16 kWh
Scope and limitations
Sun hours are an input assumption, not a live local forecast. Shading, orientation and seasonal variation require site-specific modeling.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 1b0c642d606e · Example checked: