Solar Production

Solar Production Estimator helps solar energy professionals estimate annual and monthly energy production for PV systems across all 50 US states and DC.

FEATURES:
- Annual and monthly production estimates using NREL TMY3 irradiance data
- All 50 US states plus District of Columbia
- Tilt and azimuth angle correction for non-optimal orientations
- System loss factor (wiring, inverter, soiling, shading)
- Panel degradation modeling over system lifetime
- Specific yield (kWh/kWp/year) calculation
- Performance ratio and capacity factor metrics
- Daily average production output

CALCULATIONS:
- Annual Production = System Size x Irradiance x (1 - Losses) x Degradation Factor
- Monthly breakdown with state-specific solar resource data
- Tilt/azimuth correction based on deviation from optimal
- Degradation Factor = (1 - rate)^age for aging systems

OPTIONAL PRO UPGRADE - $2.99 ONE-TIME IN-APP PURCHASE
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Unlimited saved calculation history
- PDF export of results
- Dark theme
- Ad-free experience

UPGRADE TO PRO:
- Remove banner ads
- Unlimited calculations
- Dark theme support

Designed for solar installers, engineers, and PV system designers working in the United States.