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Loads → losses → stored energy
Global Backup Power Requirements Planner
Turn a device list into a transparent continuous-load, simultaneous-peak and battery-energy requirement. You choose every planning factor; the tool does not recommend a product or silently infer a battery chemistry.
Running and surge load Every step visible Private browser workflow
Define the load
What must stay powered?
Use running watts from each device label. Enter a surge factor only when the device has a documented start-up demand.
Device load list
Running and start-up demand
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Your values stay in this browser. Analytics records only anonymous interaction names and row counts—not device watts, battery values, results or labels.
Separate load, surge and runtime
Running watts describe steady demand, while motors and compressors may need a higher start-up input. Runtime then determines energy. Keeping these questions separate prevents a single unexplained “battery size” answer.
Losses and reserve remain your evidence
Conversion efficiency, usable depth and ageing/reserve are explicit inputs. Chemistry is only a worksheet label because real limits depend on the exact battery, management system, discharge rate, temperature and manufacturer documentation.
Verify equipment and installation separately
The result is a planning requirement. Check continuous and surge ratings, battery discharge limits, cable and protection sizing, ventilation, charging, local electrical rules and installer guidance before selecting or installing equipment.
Measurement references
Check the electrical terms
These independent references support electrical terminology and SI units. They do not provide product specifications or substitute for manufacturer documentation.