In attempting to achieve communication between the inverter and the battery, I connected a standard Cat. 5e patch cord between the sole RS485 port on the 3KW LVTOPSUN inverter and one of the several ports of this same label on the JK BMS of the 48V, 280AH LiFePO4 battery. The magic smoke was instant, rendering the inverter useless. It will not even power on.
I had expected that I might need to play with the cable's pinout, and/or which battery port was connected, until I found a configuration which would be mutually intelligible to both the battery and the inverter. I had not expected to get only one chance to get it right. And I got it wrong.
It appears it will be an expensive lesson--to the tune of about $600.
I had expected that I might need to play with the cable's pinout, and/or which battery port was connected, until I found a configuration which would be mutually intelligible to both the battery and the inverter. I had not expected to get only one chance to get it right. And I got it wrong.
It appears it will be an expensive lesson--to the tune of about $600.