About this app
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.
Latest release
What’s New
- Fixed cross-app links: tapping another SolarTools app in More Tools now opens its App Store page on iPhone and iPad. - Minor stability improvements.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Oct 16, 2026 · 4:59 PM $0.99
Screenshots
