Alternator Sizing Calculator

Size marine alternator output for charging needs based on battery bank and loads

Input Parameters

Results

--
Charge Rate
amps
--
Min Alternator
amps
--
Recommended Alt
amps
--
Heat Derating
%

Reference

Max charge rates: FLA 25%, AGM 30%, LiFePO4 50% of bank Ah Derate alternator 20% for continuous marine duty Alternator must cover loads + charging simultaneously