12V Battery Runtime Calc
Amp-Hour Load Planner
$2.99 · Designed for iPad. Not verified for macOS.
Estimate usable hours, reserve time, and battery count before you size a small RV, camping, or backup setup.
12V Battery Runtime Calc is an offline planning tool for estimating usable battery hours from amp-hours, battery count, load watts, usable depth, inverter loss, and reserve margin.
Use it when you need a quick runtime answer before packing gear, sizing a small RV or camping setup, or checking backup time at home or on site. Enter battery size, voltage, battery count, load watts, usable depth, system loss, and reserve, then review usable energy, gross runtime, planned runtime, reserve time, and battery count in one result sheet.
Built for narrow field use:
- Works offline after install
- No account required
- No ads or analytics SDKs
- Local calculation inputs only
Boundary: 12V Battery Runtime Calc is an estimating worksheet only. It does not certify electrical safety, battery health, wiring, charger sizing, code compliance, or emergency backup suitability.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Refined the 12V runtime planning presentation and clarified the offline battery worksheet scope.
The developer, 光 杨, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 光 杨
- Size
- 928.8 KB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Guang Yang
