trickle charging

On our previous ICE vehicle, when we were out of the country for 4 or 5 weeks, we had a small 5w solar panel that sat on the dash and plugged into a power(lighter) outlet. This would act as a trickle charger and keep the 12v battery topped up. Does anyone know if this would work on a (2025) MME?

I’m having an issue where even after my car reaches 90% the emporium charger will still sort of trickle charge at around 7 W. It’s not a lot, but it adds up over time. Anybody else having this issue? I have even set up the Emporium charger so that it’s not supposed to be charging right now but...