Residential

Battery Backup Sizing Calculator

Determine the right battery capacity to keep your critical loads running during outages.

Backup Requirements

Critical Load (watts)Fridge, lights, modem, etc.

Backup Duration (hours)How long to run on battery

Battery Voltage

Depth of Discharge (%)LFP: 90-100%, Lead-acid: 50%

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Battery Capacity (kWh)

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Battery Units

at 13.5 kWh each (Tesla PW)

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Est. Cost

Get a custom analysis from our engineering team.

570-MY-SOLAR (570-697-6527) · solarmason.com · engineering@solarmason.com

Disclaimer: Estimates for informational purposes only. Actual results vary. Consult a qualified professional before making decisions.