Our VW camper has leisure battery, solar panel, electric hookup setup. Following installation of the leisure electrics, everything worked as expected for about a year. For the last 6 months, I noticed on the Victron app that the MPPT charger is "off" almost all the time. I assumed during the UK winter that this was due to low light and short days. We're now in Spain. The charger seems to come on for about an hour at sunrise, and the panel voltage gets up to about 18-19v. However, the leisure battery state of charge continues to diminish, and then the MPPT switches off as the sun gets higher. There is bright sunshine in the middle of the day, but the app shows no solar voltage generated. This pattern seems the same whether we're plugged in to a campsite EHU or not. Can anyone suggest what might be happening?