Battery Charge Time Calculator

Estimate how long it will take to recharge your battery bank using a solar array, AC charger, or generator.

Charging Setup

Battery Type

Total Capacity

System Voltage

Charging Source Unit

Charge Rate

Amps

Output of your charger, solar controller, or alternator.

Current Battery Level (SoC): 0%

Empty (0%)50%Full (100%)

Charging Efficiency

% (Defaulted by battery type)

Energy Needed: -- Wh

Effective Charge Rate: -- A

Note: Lead-acid absorption phase (final 15-20%) takes significantly longer than calculated here. Lithium charging is linear.