question

The default current threshold setting on the BMV is set to 0.1A (100mA) and below this value the current is considered 0. Maybe this is the issue.

Try with this setting set to 0.0A and see what happens......

From the BMV manual:

Hi

Thanks for the info

Will test tonight, however I get the same issue if i run the multiplus with a load on it cuts out at low voltage but im still seeing 85% SOC

Thanks

Something doesn't look right with your batteries, but you haven't said what size the big load is that caused a voltage drop from 25.5 to 23.5 V in 2 hours from 7PM to 9PM. That must be much be MUCH larger than 0.1A on a 95Ah battery bank.

Forgetting about the BMV for a moment, and now thinking about the batteries. Are you able to do a discharge test with a known continuous load, eg 10A for 5 hours from a full battery to see what happens to the battery voltage?

Remember as a rule of thumb, a lead acid battery is only able to supply a continuous C10 load. In this case ~10A or 250W.

If you are trying to run bigger loads than that, you are asking too much of your relatively small batteries and you will see the voltage collapse.

HI

Thanks for your reply

The big drop off in battery voltage was switching on the multiplus with no load connected so about a 1.0 amp draw.

Im guessing one of the (New) batteries is faulty.

Ill test them shortly and update the thread

Many thanks