So I'm reading and reading and I must be missing something. I'm planning to purchase a bunch of Lithium battery cells to wire in series to create a 48 volt battery pack to hook up to a Radian 8048 inverter. (the batteries do NOT have built in BMS)
I am using a FlexMax80 charge controller and am failing to understand how to get the BMS to shut the controller off when the system is fully charged. Best I can tell, the FM80 does not have any auxiliary control contacts to turn it off remotely.
I plan on using something like a Rec BMS system (centralized) but noticed that there's no contacts inside the FM80 or way for it to tell the FlexMax80 that a charge is complete or to shut it down for high voltage.
Best I can figure is to just put a large DC rated power relay in between the charge controller and the battery pack and have the BMS activate that relay as required. But this seems too simple.. so simple it's making me think I have it wrong.
Is it acceptable to just pull the proverbial plug on a FM80 when its charging a battery? Will disconnecting the battery from the FM80 in such a way damage anything?
I feel stupid asking such a basic question..
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