Technology & Computing
UPS Runtime Calculator for Server Racks
Estimate how long a UPS battery bank can support a server rack load given battery capacity, voltage, efficiency and depth of discharge.
Your inputs
Change any value to update the result instantly.
Estimated runtime
2.304 hours
Runtime in minutes
138.24
Usable energy
3,456 Wh
Connected load
1,500 W
Reduce depth of discharge for lead-acid batteries (often 50%) versus lithium (often 80-90%) to preserve battery life.
Formula and working
Runtime (hrs) = (Ah × V × DoD × inverterEfficiency) ÷ loadWatts
- 1
Collect the inputs
Battery capacity (Ah) = 100; Battery bank voltage (V) = 48; Connected load (watts) = 1,500; Inverter efficiency = 90 %; Usable depth of discharge = 80 %
- 2
Apply the formula
Runtime (hrs) = (Ah × V × DoD × inverterEfficiency) ÷ loadWatts
- 3
Result
Estimated runtime = 2.304 hours
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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