E = U·Q

Battery energy from voltage and charge

Wh = V·Ah; usable energy is lower due to depth of discharge, temperature and efficiency.

MINTSI

Result

Select a target and calculate.

Technical principle schematic

Calculation

Wh = V·Ah; usable energy is lower due to depth of discharge, temperature and efficiency.

Understand the inputs

Nominal energy E — Energy before efficiency and depth-of-discharge limits.
Nominal voltage U — Average pack voltage; real packs change voltage with state of charge.
Charge capacity Q — Manufacturer capacity at a defined test rate.

Example

48 V · 50 Ah = 2,400 Wh = 2.4 kWh nominal.

Assumptions and limits

Constant average voltage; Peukert effect and ageing are excluded.

Sources