I have installed in my campervan a 315W solar panel + victron MPPT 100/30 + AGM battery 190Ah C10. Everything worked properly during nearly a year. It's been a few days that my MPPT is showing a very strange behaviour when being in Absorption mode.
First of all, the voltage is not kept constant during absorption as it should. The received power keep oscillating between 0W and the maximum power that the PV cell can provide. It looks to me that the MPPT cannot find the maximum power point anymore. Eventually the battery started to make a slight bubbling noise.
I lowered the absorption votlage such that the system could go into float mode and still this strange oscillating behaviour shows up.
Below the configurations and some sceenshots of the status;
Could someone help me with this issue? Might it be an MPPT issue, ... ?
Any help woul be very appreciated.