I’m experiencing an issue with my photovoltaic system. It started drawing 100% of energy from the grid, even when the sun is shining and the batteries are fully charged. The system has been running for about 9 months, all devices are updated to the latest firmware.
My setup includes:
3x MultiPlus-II 48/5000/70-48
5x Pylontech 3000C batteries
3x MPPT VE.Can 250/85 rev2
Cerbo GX
I’ve gone through all the settings, but the problem persists. Every time I switch from Inverter Only mode back to Mode - On, the system exclusively draws energy from the grid instead of using solar power or batteries.
Has anyone experienced something similar or can suggest what to check? I’d appreciate any advice.
A few more observations: I discovered error code #66 in the logs of the MPPT tracker. After some research, I found that others have encountered this issue, and it seems to be related to the latest firmware version 3.16.
Why do I mention this? Because I suspect my entire system started behaving strangely after the update. I rolled back the MPPT trackers to version 3.15, but unfortunately, this didn’t resolve the issue.
What’s interesting is that I can change the ESS settings and the minimum battery SOC, but the system still behaves the same, as if it prioritizes input from the grid. I’ve also tried adjusting the “grid setpoint” and “feed-in” parameters, but even these changes didn’t affect the system’s operation.
Don’t know if your issue is connected, but I found a similar unwanted change in behaviour of my (same) MP2 was reset by power cycling the MP2 and pylon batteries.
I have restarted all the devices within the system, including the batteries, but so far, nothing has helped. I am still looking for a solution. Thank you very much!
Yes, I have a smart home controlled by Loxone, and I’m using data from the Cerbo in my system. Would it be better to disconnect it from the Victron system?
I had this problem on a motorhome system I just can’t remember how I cured it! I recall it was very simple, just a simple setting somewhere with an obscure name