Marine electrical planning, made practical
Better answers for your
boat’s electrical system.
Practical power-planning tools for boaters. Plan battery capacity and trolling-motor runtime with clear assumptions—not black-box estimates.
- Free to use
- Transparent methodology
- Built for mobile
Runtime planning exampleLive
12V LiFePO₄ battery bank
100Ah20A avg.
Estimated runtime3h 22m
Includes usable-depth, reserve, and discharge-rate assumptions
Featured marine tool
Plan your trolling-motor battery
Estimate runtime or work backward from a day on the water to a practical battery-bank size.
01
Marine-specific inputs
Model voltage, chemistry, battery configuration, motor draw, load, and reserve.
02
Assumptions you can inspect
Methods and primary references are shown alongside the result.
03
Private by default
Calculations happen locally. Calculator values are not sent or stored.