YOUR HOUSEHOLD FIELD GUIDE
Backup Power Runtime Calculator
Estimate battery runtime for a steady electrical load. Use measured appliance consumption whenever possible.
Method: capacity × usable fraction ÷ average load. The default 85% is an adjustable planning assumption, not a measured efficiency claim.
This estimate does not confirm compatibility. Check continuous output, startup surge, inverter idle draw, temperature, battery condition and the appliance duty cycle. Do not use this estimate as a medical-device backup guarantee.
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