# Solar Inverter — NEC 690.7(A) Inverter

> NEC 690.7(A) Inverter (iPhone/iPad app by Rizvan Adzhoian.)

- Source: https://appshunter.io/ios/app/solar-inverter/id6767838166 (this page in markdown: same URL + `.md`)
- Developer: [Rizvan Adzhoian](https://appshunter.io/developer/1891746079)
- Category: Utilities, Business
- Price: $0.99 with in-app purchases
- Age rating: 17+
- Requires: iOS 13.0 · 32 MB
- Languages: American English
- Released: 2026-05-11
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/solar-inverter/id6767838166/reviews.md

## What is Solar Inverter?

Solar Inverter Sizer verifies inverter-to-array compatibility for solar PV systems per NEC Article 690.

Features:
- DC/AC ratio calculation with optimal range guidance (1.1-1.3)
- NEC 690.7(A): String Voc at minimum temperature vs max DC input voltage
- NEC 690.8(A): Current capacity check (Isc x 1.25)
- MPPT voltage range verification
- Support for string, micro, and hybrid inverter types
- Temperature coefficient adjustment for cold climate sizing
- Compatibility status: compatible, incompatible, oversized, undersized
- Save calculations to history
- Export professional PDF reports
- Works offline

Standards: NEC 690.7(A), NEC 690.8(A)

Contact: support@tradetools.dev

## Pricing and in-app purchases

Base price: $0.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Unlock | $2.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-06-13

Inverter current check now follows the printed NEC 690.8(A)(1) rule:
- Imax = array Isc x 1.25 compared against inverter max DC input (was x1.5625 - the extra 125% continuous factor belongs to conductors/OCPD, not equipment ratings; normal arrays no longer flag as incompatible)
- Result cites the rule and reminds to verify the inverter max short-circuit input rating

### 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.*