Guide to Calculating Battery Backup Time
Determine Power Consumption:-
✔ List all the devices connected to the UPS or inverter in the rack.
✔ Find the power consumption (in watts) of each device (usually provided on the device label or in the user manual).
✔ Add the power consumption of all connected devices to get the total load (in watts).
Check Battery Capacity:–
✔ Battery capacity is usually expressed in ampere-hours (Ah) or watt-hours (Wh). This information is found on the battery or in its documentation
.✓ If the battery capacity is given in ampere-hours, convert it to watt-hours by multiplying it by the battery voltage:-
Watt-hours (Wh) = Ampere-hours (Ah) x Battery Voltage (V)
Estimate Battery Backup Time:-
✔ Use the following formula to estimate the backup time:-
Backup Time (in hours) = Battery Capacity (in watt-hours) + Total Load (in watts)