Battery Size Calculator

Calculate required battery capacity for your marine or RV electrical system.

Application Type
What do you want to calculate?
Battery Settings
DC Loads (12V)

Click presets to add common devices:

Device Watts Hrs/Day
DC Total: 0 Wh/day
AC Loads (via Inverter)

Click presets to add common devices:

Device Watts Hrs/Day
AC Total (+ 15% inverter loss): 0 Wh/day
Charging & Solar
Amps
Recommended Battery Size
0 Ah
Add devices to calculate
Daily consumption:0 Wh
Daily Ah @ 12V:0 Ah
Usable capacity:80%
Days of autonomy:1
Recharge time @ 10A:—
Solar needed:—

Estimates only. Actual usage varies.
Consult a professional for system design.

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