Have a customer with a Multi RS 48/6000 in a truck, connected to generic 48V CANbus batteries. No problem charging from solar (via separate MPPT) but the batteries will not charge from the Multi RS when connected to shore power. The message on screen says ACIN1 relay open which would explain why its not working but I can't find any settings that relate to this relay, or any reason why it would not close when connection is active.
There are no faults in the log except battery voltage low (its currently at 45V so desperately needs charging asap). I've tried with DVCC enabled and disabled and with battery canbus cable unplugged so I'm 99% sure its something internal to the RS Multi. Any ideas?