I can read all the values that the datasheet says is available, like AC OUT Volts is what I expect at about 120.02v. But AC OUT Current (AC_OUT_I) just shows -1 or 0 for me.
I have some experience using VE.direct USB cable with a raspberry pi to read the metrics from the serial port for a BMV so I'm pretty sure I'm doing the basics right.
Example output, includes model and firmware if anyone is familiar with these:
['Checksum', '\xd2'] ['PID', '0xA279'] ['FW', '0114 ['MODE', '2'] ['CS', '9'] ['AC_OUT_V', '12001'] ['AC_OUT_I', '-1'] ['V', '13541'] ['AR', '0'] ['WARN', '0']