My setup:
- Victron SmartSolar MPPT 75/10
- 100 Panel on the vehicle roof
- Odyssey Group 31 battery.
- 10 gauge wire on the PV and Battery side leads with a 10a fuse on the positive battery lead.
- No load connected
When the vehicle is in the garage I use a CTEK (Odyssey approved) charger. So the vehicle normally leaves the garage with a full charge. I will drive to the store and turn the vehicle off with a fully battery (around 12.8/9) and look on my VictronConnect app that I am getting PV. I will come back a short time later (20 mins) and my battery is at 12.4 which shows both in the app and also in a separate volt meter I have installed. What in the world is going on?