do BMS ignore overcurrent and sit at max amps? or disconnect and have 0

[Stupid Monkey]

So many MPPTs can be "overdriven" with panels, ideal for the UK and its cloudy skies, can you do the same with a BMS?

So if I have 2000-3000w of panels, but only 120A of MPPT (@13v) to collect 1500w of power thats all fine.

Generally there will be "some" load but if the BMS is 100A will it just take 100A and ignore the rest or will it stop all charging if the MPPTs are giving a max 120A ?

Specifically the low-temp-disco BMS here that I've ordered

Finally found a LiFePO4 BMS with Low-temp Charging Protection

Spent the last few days and tonight testing BMS: 1. The "new" daly LiFePO4 BMS (that states in the data sheet that it has low temp charging protection) does not have low temp charging protection. And yes, it has a temp sensor attached. This disappointed me big time. Video to come. 2. Next, I...

diysolarforum.com

 

[John Frum]

I don't see much info on the BMS you have on order but it will have a limit on the charge current it will accept.
If you exceed that limit the BMS protection circuit will trigger and stop the current flow to protect the battery(and the BMS).
At least that is what should happen.

 

[Stupid Monkey]

So if you give 101A it will cut to 0, not 100?

 

[John Frum]

So if you give 101A it will cut to 0, not 100?

Yes.

 

[John Frum]

Actually I would be a bit surprised if your BMS will even accept 100 amp charge current.
Do you have any more doco than the link in your sig?

 

[Stupid Monkey]

Actually I would be a bit surprised if your BMS will even accept 100 amp charge current.
Do you have any more doco than the link in your sig?

No, but looking at my solar upgrade, so wondering if to add 60A MPPT to the 30A I have for 90A or adding a 100A for 130A total.