Hi, I'm not sure if this has been asked before though I haven't been able to find it. I'm thinking about buying a Bluetti AC200max and I want to add a DIY backup battery. I have approx 1500 watts of panels that I charge a 48v lifepo server battery via a mppt charger. So I am wondering can I have this charger charge that battery and connect this battery to the solar input of the Bluetti and just leave it hooked up so that solar charges server battery and server battery charges AC200max? Obviously the cables from MPPT and from the cable going to Ac200 are connected at the battery terminal and not sure if this creates an issue or not?