Hi I have 6.2 kw's of solar panels running to my 48v 12KW Growatt inverter and 600 ah of lithium batteries, it has been working very well for a year and a half now. But now I'm starting to run out of solar power to keep my batteries charged back up every day. I've purchased a little over 8 kw more of used solar panels that I'm wanting to add to my system. I am wanting to buy enphase inverters to go on the used solar panels I just purchased with the envoy controller. My question is can I purchase a reliable disconnect switch or relay that I can connect to the 48v dc battery bank and have it to kill the 240 volt power that is supplying the enphase envoy power once the battery reaches a set voltage to shut the envoy and solar array off to keep from over charging my 600 ah 48v Lithium battery bank .