Hi
Does anybody have the Peukert Co-Efficient value calculated by Victron for their AGM batteries? In particular the Telecommunications AGM batteries. I understand that this changes with the life of the battery but normally manufacturers provide a value. Thanks in advance for your help.
Matt
I have a bank of the 115Ah telecom batteries and used the capacity data at different discharge times from the datasheet to calculate Peukert using the Victron calculator. I have a large bank so it only sees short periods at C3 and most of the time at C20 or even longer discharge time. I used 1.15 based on the longer discharge times. This may undercount a bit during the few short periods of higher discharge rate where 1.18 would be better.
Stay with one setting for a bit and see how it goes.
Check your Ah in and Ah out. If there is an issue you will see it.
The peukert is based on the expected C draw of the load you are using. If you are not going above the recommended c rating then generally the 1.25 works when new.
You can work it out yourself as the battery ages.
Explained here. There is a calculator at the bottom. It uses AH and the shunt can measure that easily.
