Battery runtime estimate
Estimate runtime from stored energy and a constant appliance load.
How it is calculated
Delivered Wh = volts × amp-hours × usable fraction × conversion efficiency. Runtime = delivered Wh ÷ watts.
Assumptions & limits
Ignores start-up surges, temperature, aging and device shutoff limits. Follow manufacturer ratings; this is not an installation or electrical safety calculation. Defaults are illustrative planning inputs, not recommended minimums or a guarantee of safety.
Planning estimates only. Defaults are illustrative, not personalized recommendations. Do not use these calculations as medical, structural, electrical installation or other safety certification. For informational and educational purposes only. CivArk is not medical, legal, engineering or other professional advice. Verify information with qualified professionals and current local authorities. Estimates and preparedness plans cannot guarantee safety or survival.