The current sensor in the MPII on L3 has stopped reading values? Any clues to what could be wrong? All loads are on the AC-out side (PV too). The gridmeter is directly in front of the MPII between my main fuse and main switch.
I’ve set up my L1 MPII as a single unit using 1 US5000 (out of the total of 5). I then added another one and will keep doing this untill I can rule out my batteries. When I’m done with that I’m goint to use the L2 MPII as a single and see if that is stable. Then the L3 MPII. If all is stable I’m guessing my MPII are fine and the batteries too…
Before I did this I saw one battery that was around 5 degrees C hotter than the rest of the units. Quite strange since they are in the same room. Any reason to be concerned?
Another update. So far I left out the 1 battery module that was hotter than the rest. So I’m running my L1 MPII with my 4 remaining US5000 batteries and everything seems fine and stable for 48 hours now.
I don’t really have the time to test the other two MPII before the weekend so next update will be next week.
There have been several reports of similar problems, it’s usually when there’s a bad connection to the input current sensor (current transformer). Depending on exact hardware model, might be cured by plugging a 3.5mm jack in and out of the “external current sensor” socket, or maybe unplugging and reseating internal ribbon cables. Searching the forum should give you more information.
Thanks for the input. If that is the case I’ll put in a warranty claim. The units are front 2022 and have not been moved or pushed to their limits since the install.
Thanks I’ve tried that and it worked. I restored all settings on the three units, flahed my new config (that I used when I was in single unit mode last week) and updated my assistant configs.
Still running on 4x US5000. I’m going to add the fifth when I feel this 4x setup is stable for a few days. If it goes unstable again and the mV/temp differences are big again I’m going to mail Pylontech.
