I think the biggest reason against solar powered <anything> is that 'solar' doesn't mean 'free'. Last time I've checked solar panels were just a way to transpo

I think the biggest reason against solar powered <anything> is that 'solar' doesn't mean 'free'. Last time I've checked solar panels were just a way to transport energy (kind of like a battery). I.e. you have to invest $X into panel manufacturing to receive $Y worth of electricity in some remote location with no power. Several years ago $X was equal $Y. Granted, technology is improving and panels cost less and less, now $X << $Y. But even today solar based solutions are not economical without goverment incentives. EDIT: typo