Thanks for the link. That panel would be perfect, and could easyly be glued to the roof and cable feed in the bach hatch to a controller mounted in the trunk with leads going to the battery.
60 watt's should do the trick.
Theres not 9 kW in a liter of gas. You are thinking diesel. Less energy in gas than diesel. 11.8 kWh/kg x 0,7 (density) = 8,26 kWh/liter (even less with alcohol in it) Assuming a 25% effeciency due to all the systemlosses as you say. It starts to look as a 2% imporvement in milage, if one can use all the power produced by the panel, and that probably not possible.
Not much for the piggyback thing. Too much trouble in daily life. As the car is still new, I don't want to work on the big EV battery. Would like to be feeding in power as I drive to extend range in EV mode. For the time beeing, I belive this is better done to the 12v battery.
But grounds for an experiment I think. Would look cool and stock with that panel glued on to the roof
