Hello municipality, I had the idea that in winter, if you do not need the solar ventilation, the “feeling” energy would have to be too good for our stressed infotainment battery. Is that possible (even with small modifications)!? Because what is enough to operate the fan motor, should be good for the battery even if the voltage is above 13V. Ignition off, solar ventilation on, with a relay and a diode redirect the solar current to the battery!? Thinkan sets are in demand here! This is just the right thing for a winter holiday (long service life!!) MfG. WD-V10