you'll need to find a circular 4-pin adapter to plug into the slot where the Solarman (IGEN) stick-logger goes. Circular Connector: Pin 1 = Positive 5 Volts, Pin 2 = Ground, Pin 3 = RS485+, Pin 4 = RS485-. For the life of me, I can't find out what the spec of the adapter is to order one. You can then just use a Raspberry Pi or similar with the Waveshare RS485<->Ethernet adapter and pymodbus to hoover up all metrics from the Megarevo. Some folks have done some pretty neat graphing of the metrics.