Calculator
Battery Backup Runtime Calculator
How long a portable power station, UPS or home battery will run your devices during a power outage.
How it is calculated
Usable energy (Wh) = capacity × usable depth of discharge × inverter efficiency. Runtime = usable energy ÷ (load − solar input). Real runtime drops in the cold and with high-surge devices.
Results are estimates for planning, not bills or professional advice. For generator hookups use a transfer switch installed by a licensed electrician.
Recent reports across the U.S.
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Auto-resolved Baker, LA 70714 · East Baton Rouge Parish “Resolved automatically: no new outage reports for 24 hours”
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Auto-resolved Clarksville, TN 37040 · Montgomery County “Resolved automatically: no new outage reports for 24 hours”
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Auto-resolved Clarksville, TN 37043 · Montgomery County “Resolved automatically: no new outage reports for 24 hours”
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Auto-resolved Branson, MO 65616 · Taney County “Resolved automatically: no new outage reports for 24 hours”
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Auto-resolved Keota, IA 52248 · Keokuk County “Resolved automatically: no new outage reports for 24 hours”
Questions about your electric bill or backup power?
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