RE: MPP Solar/ Voltronic / Axpert King Inverter cable to -> Selpos 48V 200A BMS RS485
Sorry in advance but im stuck - I looked at the manual, but no matter what pins I try the inverter always fails with warning 61 (cant communicate with battery)
Steps taken: Set single battery pack DIP adress switches so 1 is set to 'ON' > Set inverter under option 5 to Pylon and confirm. Reboot Battery and then reboot inverter. Nothing - after 3 mins beeping error 61 to say no comms with battery.
Method : I have a RJ45 network cable I cut the end off and connected a special Rj45 cable with screw pins so I can easily change the wires around for pin out testing. I tested the pins once connected with multimeter to make sure pin out is as expected.
However ....
Page 31 of the Selpos Manual shows:
Does this mean 1/2 OR 8/7 pin pairs can be used? ( I have tried these both)
But then also in another Selpos Manual I can see:
I think RM485 is used for battery to battery comms is that right?
At the inverter end...
Axpert King / MMP Solar /
Reading online seems to show pins 5 and 4 are RS485A/B
So I tried the following:
Inverter 5/4 > 2/1 BMS
5/4 > 7/8 BMS
5/4/6 > 2/1/3 BMS
5/4/6 > 7/8/6 BMS
I then reboot all and set option 5 for battery in inverter to Pylontech - but all result in error 61 - no battery comms.
Also tried 4/5 , and BMS 1/2 , 8/7 (back to front) All get error code 61
Any ideas?