Ivaenol

Ok Thanks. That's what I needed to know - that it will work at some level. I'll make sure battery bank vs solar panels are sized appropriately for charge voltage, and rely on the BMS otherwise until I have time to play around with the battery Comms and a raspberry pi.

I've got a 48V small off grid solar installation with some AGM lead acid batteries that I've not looked after very well and which are going to need replacing soon. I've been wondering about the Pylontech Lithium batteries, but have some questions that I can't make out from their manual and searching. The manuals describe a communication cable between each battery (which makes sense from a BMS/balancing point of view), but also a communication cable to the hybrid inverter (which I don't have because I have separate MPTT solar charger and inverter, neither with CAN or rj45 connectors). Can these batteries work just dropped into an existing 48V system (as the only battery and with charging voltages set appropriately in MPTT), or do they require an external comms link to work? Something I read from @Youda seemed to suggest he'd had a working system with no comms link at some point. Long term I'm happy to play around with an arduino connected to the CAN bus to get things perfect, but would be good to get it working first without too much trouble!