odya/esphome-powmr-hybrid-inverter

Pintout and voltages from RJ45 port on POW-HVM3.2H-24V-N

Oxmaster opened this issue · 2 comments

I've got POW-HVM3.2H-24V-N, still waiting for the batteries, so testing it with benchtop power supply.
IMG_20240321_183427

I'm checking the RJ45 pinout on my bench and I'm getting different outputs than from the diagram provided.

rj45

White green (1) is GND
Brown (8) is + VBat 24 V
Blue (4) is + 13.2 V

or at least that's what my multimeter says. Don't want to remove the top cover because of the tamper seal to check for the RJ45 board.

I'm waiting for batteries, if the inverter will end up working I will open it up to check the pinout on the PCB.

I just checked with my hobby osciloscope,

8 as GND:

  • 1 steady – 13.5 V
  • 4 steady 13.5 V
  • 7 maybe some data at 38 kHz, 2 V to 4 V RMS

1 as GND:

  • 2 50 hz noise 1 V RMS
  • 4 steady 26.5 V (V BAT)
  • 7 maybe some data at 38 kHz, 2 V to 4 V RMS
  • 8 steady 13.2 V

Seem to work with standard pinout, just strange voltages when measuring.