I have a BSC IP65 12/10 installed in my camper van (VW Transporter) which is connected to the extra battery and a power socket. The last few years everything worked fine and the voltage, when connected to power supply, went up to 14.4 without a problem.
Since a few weeks the charger is going into Absorbtion mode and only goes up to 13.1 (even goes down when our fridge is turned on). When I disconnect the power a few times en reconnect it it suddenly works fine again. I always have to try several times to find a good connection.
The battery was tested and is in perfect condition. The CEE connector for the power supply to the BSC is also brand new so shouldn't be the problem.
Any ideas what the problem could be?