# Battery Bank Size Planner — Solar Off-Grid Watt-Hour Ah

> Solar Off-Grid Watt-Hour Ah (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/battery-bank-size-planner/id6761745483 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-04-08
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/battery-bank-size-planner/id6761745483/reviews.md

## What is Battery Bank Size Planner?

Undersized battery banks mean dead power at night. Oversized banks waste money and space. This calculator tells you exactly how many batteries you need for your off-grid or solar setup.

Enter daily load in watt-hours, system voltage (12V, 24V, 48V), depth of discharge percentage, autonomy days, and individual battery specs. Calculates required amp-hours, batteries in series and parallel, total battery count, and total bank capacity.

WHAT IT CALCULATES:
- Required total amp-hours
- Batteries in series (voltage matching)
- Batteries in parallel (capacity matching)
- Total battery count
- Total bank capacity vs required

KEY FEATURES:
- Supports any battery chemistry (lithium, AGM, flooded lead-acid)
- Depth of discharge adjustment
- Autonomy day planning
- Works completely offline
- No account or login required

Perfect for solar installers, RV owners, cabin builders, and marine electricians.


## Version history (last 3 releases)

### 1.0.3 — 2026-06-27

Added a More Pro Tools section to discover related field calculators.

### 1.0.2 — 2026-04-12

Bug fixes and performance improvements.

### 1.0.1 — 2026-04-08

No release notes.

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All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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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 2026-08-18.*