Daly BMS and MPP hybrid inverter

[webyoo]

I have a problem with an 8s 250a 24v Daly BMS. I'm running a 3.6 kW MPP hybrid inverter.
It started operating perfectly 24 hours earlier, and the battery was 25% off full charge this morning. The battery was charging quickly; however, by midday today, the BMS voltage passed to the inverter had fallen to around 12 volts, and the MPP reported no battery was connected. Using a metre, the voltage of the 8 cells in series is 26.75 volts. Has anyone else had a similar problem, or is this Daly simply failing? I really appreciate any advice.

 

[MisterSandals]

Using a metre, the voltage of the 8 cells in series is 26.75 volts.

What was the voltage of the cells thru the BMS? (cell 8 + to BMS P-)

Is it a smart BMS that you can connect to with a smart phone? This would show the state of the BMS.

 

[webyoo]

Yes, smart BMS. I have just taken new measurements, and ironically, the Bluetooth part works fine. Please see the attached images taken this morning. The voltage output from the BMS with no connection to the Mpp is 17.39 volts and with connection to the Mpp it falls to 2.19 volts.
Battery voltage 26.73 volts. Mpp error code is saying no battery is connected.

 

[MisterSandals]

The voltage output from the BMS with no connection to the Mpp is 17.39 volts

Your pic shows the discharge mosfet is disabled. There is an error "discharge temp low level".
Do you have a temp probe that is not connected? Or is there a discharge temp setting you can raise or disable?

The BMS seems to be doing its job, it looks setup wrong.

 

[webyoo]

MisterSandals many thanks for pointing out the error I made the changes, and it looks as if that was the problem.
I will check over the settings before tomorrow and then think of a grovelling apology for Daly.
Thanks again for your help.

 

[OffGridForGood]

This is exactly what makes the forum Awesome!