# Solar Production — NREL TMY kWh

> NREL TMY kWh (iPhone/iPad app by Rizvan Adzhoian.)

- Source: https://appshunter.io/ios/app/solar-production/id6767838845 (this page in markdown: same URL + `.md`)
- Developer: [Rizvan Adzhoian](https://appshunter.io/developer/1891746079)
- Category: Utilities, Business
- Price: $0.99
- Age rating: 17+
- Requires: iOS 13.0 · 33 MB
- Languages: American English
- Released: 2026-05-11
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/solar-production/id6767838845/reviews.md

## What is 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.


## Version history (last 2 releases)

### 1.0.1 — 2026-05-14

- Fixed cross-app links: tapping another SolarTools app in More Tools now opens its App Store page on iPhone and iPad.
- Minor stability improvements.

### 1.0.0 — 2026-05-11

No release notes.

## More apps by Rizvan Adzhoian

- [Conduit Fill Calculator-NEC](https://appshunter.io/ios/app/conduit-fill-calculator-nec/id6761846849)
- [Electrical Load Calc NEC](https://appshunter.io/ios/app/electrical-load-calc-nec/id6763250945)
- [Transformer Calc NEC](https://appshunter.io/ios/app/transformer-calc-nec/id6763311943)
- [Voltage Drop Calc NEC](https://appshunter.io/ios/app/voltage-drop-calc-nec/id6763312448)
- [Grounding Size Calc NEC](https://appshunter.io/ios/app/grounding-size-calc-nec/id6763312724)
- [Breaker Size Calc NEC](https://appshunter.io/ios/app/breaker-size-calc-nec/id6763312865)

All apps by Rizvan Adzhoian: https://appshunter.io/developer/1891746079

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*