Low Battery alarm with new firmware (MP2)

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klaus78 asked Apr 4, '24

After upgrading to the latest firmware I got several low battery alarms.

The voltage seems to be ok (3.12V):

The new ESS assistant is set to LiFePo4 with the default values:

The alarm does not come from the BMS.

What's going wrong here?

Multiplus-II 48v battery alarm

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Answer 1 · 2024-04-04T07:22:19Z

nickdb answered · Apr 04 at 07:22 AM

ESS should not be configured with defaults, they need customising for your battery.

You also need to look at the total battery voltage reported by the multi, not the BMS cell voltages.

It helps to check ccl and dcl as well on the bms.

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Answer 2 · 2024-04-04T07:52:49Z

klaus78 answered · Apr 04 at 07:52 AM

Battery voltage was 51.07V at 23:12.

I will change the cut-off voltages for 0.005C to 50.1V and see what happened.

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