Can the relay function on the smart solar mppt solar controllers be used to trip a shunt trip circuit breaker - specifically for an over voltage situation? Under voltage protection isn’t a concern as the lifepo4 BMSs and the inverter low voltage cutoff is enough protection. But I am concerned if one of the mppt goes full open voltage it would probably instantly destroy the BMSs and then start cooking around 120kw of lifepo4.
Not sure that is agreat idea. Using the thing you want to protect against to do the protecting.
The bms should also be able to protect against high voltage as well (to spme degree)
But for OVP look at SPDs or the smart battery protect (remebering that is is unidirectional)