Been playing around with this setup and found that I can get it to partially work.
I reflashed the ESPEasy_v2.0.0-dev8_normal_4096 build using the Tools/Flash option. ...and then deactivated all four of my INA219s and then cumulatively activated them one at a time. The first three, when activated, worked properly. i.e. Gave sensible and different values for the charging voltage and current, but as soon as added the 4th INA219 device all 4 devices reverted back to the original 32.76V at -0.00Amps. I then deactivated the 4th INA again, rebooted the NodeMCU and the 1-3 INAs started working again. Looks like there's a problem with adding the 4th device. Any advice or guidance on this?
Have to say that despite setting all the readings to 3 decimal places, it looks like most of the values are within 0.001V or amps of each other. This makes my highly suspicious as I don't believe the batteries or seperate PSU links would provide that much consistency.
...and just to complete the picture, none of the Domoticz meters work configured with the appropriate IDX numbers.
Well, it's a step in the right direction...
Update: I replaced the 0x45 INA unit with a new one - same problem! I also tried swapping the leads from one of the other 3 units (i.e. 0x40, 0x41 and 0x44) - same problem! It appears to be the 0x45 resouce that's causing the problem. I'd welcome comment on this.