# Solar Battery Sizer — NEC 706 ESS Sizer

> NEC 706 ESS Sizer (iPhone/iPad app by Rizvan Adzhoian.)

- Source: https://appshunter.io/ios/app/solar-battery-sizer/id6767838417 (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 · 34 MB
- Languages: American English
- Released: 2026-05-11
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/solar-battery-sizer/id6767838417/reviews.md

## What is Solar Battery Sizer?

Solar Battery Sizer helps solar energy professionals design battery banks for off-grid and hybrid PV systems per NEC Article 706.

# Features
- Daily energy consumption (kWh) and days of autonomy
- Multiple battery chemistries: LFP, lead-acid AGM, lead-acid flooded, NMC
- System voltage selection: 12V, 24V, 48V
- Depth of discharge (DoD) per chemistry defaults
- Round-trip efficiency factor
- Temperature derating factor
- Required capacity in kWh and Ah
- Number of batteries and total system cost estimation
- Usable energy after DoD and efficiency losses

# Standards
- NEC Article 706 (Energy Storage Systems)
- Industry-standard chemistry defaults

# For
Solar installers, off-grid system designers, electrical contractors, EPC engineers, students preparing for NABCEP exam.

# Optional Pro Upgrade - $2.99 one-time in-app purchase
Pro unlocks history of saved calculations, dark mode, PDF export, and removes ads. One-time purchase.

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

## 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 — 2026-06-14

- Four battery chemistries to choose from: LFP, NMC, AGM, and flooded lead-acid, each with its own depth-of-discharge, round-trip efficiency, cycle-life, and cost defaults.
- Clearer chemistry names so the right defaults are easy to pick.
- Minor stability improvements.

### 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.*