Battery Storage Calculator

Determine the right battery storage capacity for your solar system. Enter your daily energy usage and desired backup hours to find how many batteries you need.

Daily Energy Usage (kWh)

Backup Hours Needed

Battery Capacity (kWh)

Depth of Discharge (%)

Cost Per Battery ($)

Batteries Needed

Total Storage

27.0 kWh

Actual Backup Duration

19.4 hrs

Estimated Cost

$20,000

Required energy: 15.0 kWh. Usable per battery at 90% DoD: 12.2 kWh. 2 batteries provide 24.3 kWh usable storage.