7 sqm seems ambitious looking at the renders which have a few pannels on the bonnet and presumably a few on the back (but most of the top is all glass and none

7 sqm seems ambitious looking at the renders which have a few pannels on the bonnet and presumably a few on the back (but most of the top is all glass and none on the doors) - maybe more like 2-2.5 sqm? Not saying it’s infeasible based on your other calcs - I’m not qualified to say, but you can see the panels on the render and they are pretty small so that number might need adjustment. Edit: the panels on the front appear to be 20cm * 20cm = 0.04 sqm each, so 7m would be 175 of those. I think you can count/estimate 12-15 on the right hand side of the bonnet if you zoom in.