I’ve just finished hooking up my solar charge controller to OpenHAB (more for getting the graphs, but also many potential uses for automation). Mine is a 1210A, but should work with any of the RS485 based ones.
It uses a NodeMCU board, and a RS485 adapter to talk to MQTT, and then get pulled into OpenHAB.
Done a write up incase anyone is interested:
Code is all in Github: