Guide to Calculating Battery Backup Time for Rack Systems

Guide to Calculating Battery Backup Time for Rack Systems

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) × 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)

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Source: LinkedIn

Credits: Mr. Ron Michael Johny – RCDD® I DCDC®’s Post