Batteries
Peukert Battery Runtime Calculator
Enter values for Peukert Battery Runtime that describe the same case, then use peukert runtime as a check rather than a design approval.
Build the Peukert runtime case
Keep Peukert Battery Runtime units and measurement conditions consistent before comparing peukert runtime.
Scope of the peukert runtime result
Use the page when peukert runtime needs to be checked without rebuilding the equation by hand. The surrounding notes define how far the number should be carried.
Source notes for Peukert Battery Runtime
Collect Rated capacity, Rated discharge time, Load current, and Peukert exponent from the same operating case before reading peukert runtime.
- Rated capacity
- Enter rated capacity in Ah. Default shown: 100 Ah.
- Rated discharge time
- Enter rated discharge time in h. Default shown: 20 h.
- Load current
- Enter load current in A. Default shown: 20 A.
- Peukert exponent
- Enter peukert exponent. Default shown: 1.15.
Interpreting Peukert Battery Runtime
If peukert runtime is near a limit, preserve the calculated value from Peukert Battery Runtime and apply required margin after the calculation.
The Battery Self-Discharge page can be useful as a follow-up, but only after the present inputs have been checked.
Formula notes for Peukert Battery Runtime
Read the Peukert Battery Runtime equation from the units on this page. A familiar symbol can shift meaning between DC, AC, energy, component, or billing work.
Boundaries for peukert runtime
Peukert behavior varies with battery chemistry, temperature, age, and discharge range.
- Manufacturer test conditions
- Temperature effects
- Aging and capacity fade
Operating notes for Peukert Battery Runtime
Peukert Battery Runtime should be read with chemistry and state-of-charge notes. The same amp-hour value can represent a different usable-energy case at another discharge rate.
When peukert runtime becomes an input to another worksheet, copy the value only after the units and source condition have been verified.
Records for peukert exponent
Attach chemistry, state of charge, temperature, and the test condition used for the Peukert Battery Runtime entry.
If a later Peukert Battery Runtime run changes only rated discharge time, label it as sensitivity work. Several changed conditions deserve a new baseline.
Use Battery C-Rate for that neighboring calculation rather than adding unstated assumptions here.
Before saving peukert runtime
Why might a real measurement disagree?
A field reading for Peukert Battery Runtime can include losses, tolerance, temperature effects, waveform distortion, or instrument limits that the worksheet does not model.
What should be recorded with the answer?
Save the Peukert Battery Runtime inputs, unit basis, operating case, and result note so peukert runtime can be reproduced later.
Can the default values be used as a recommendation?
No. The Peukert Battery Runtime defaults only demonstrate the form. Replace them with measured or rated values for the actual batteries case.
What does a Check inputs message usually mean?
On Peukert Battery Runtime, Check inputs usually means a required entry is missing, outside its allowed range, or creating an undefined operation.