We had our solar panels (5.6kw), Solis inverter and 7 x Pylontech US3000C batteries, set up in Oct 2022. On 31st Nov 2023 we got a UN-Vbatt alarm. The batteries dropped below 10%. We have been onto our installers who got us to reset the system a couple of times with no change. The system now powers down at night because the batteries are now in CAN-COM-FAIL and in alarm mode. We were in the process of changing electricity supplies to take advantage of low night time rates but cannot now charge the batteries from the grid. Today the installers have said we can have an engineer out on the 3rd Jan to look at the system!
As an aside, we had an engineer out a week prior to the alarms as our meter readings and solis app readings do not reflect each other. I am yet to find an explanation. They said there was a clip broken that clamps onto the mains cable so it was replaced and moved to a different spot but that everything else was fine and the firmware was up to date. That is despite acknowledgement from the engineer that the readings don’t look right.
The day after our first fault, our installation company sent out a video explaining how to change settings of the batteries to increase the battery level, that triggers a grid top up, for the winter. This leads me to suspect I am not the only person who has had this issue!
Has anyone else had a similar problem or have any ideas how to get my batteries to take a charge again?
As an aside, we had an engineer out a week prior to the alarms as our meter readings and solis app readings do not reflect each other. I am yet to find an explanation. They said there was a clip broken that clamps onto the mains cable so it was replaced and moved to a different spot but that everything else was fine and the firmware was up to date. That is despite acknowledgement from the engineer that the readings don’t look right.
The day after our first fault, our installation company sent out a video explaining how to change settings of the batteries to increase the battery level, that triggers a grid top up, for the winter. This leads me to suspect I am not the only person who has had this issue!
Has anyone else had a similar problem or have any ideas how to get my batteries to take a charge again?