Quote:
Originally Posted by freebeard
Solar car roofs make sense as they liberate one from Big AC's grid. It makes more sense for roof panels to be optimized for Solar exposure, rather than fixed.
What power lost as the house battery transfers to the car batter?
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The problem is that most EVs spend most of their time charging at home. So whatever can be installed at home is still going to be more efficient. Likewise, once the car is fully charged, extra energy the solar panels mounted on the roof of it could produce becomes completely wasted. But obviously, any net metering or battery bank at home can keep home panels productive.
I think similar efficiencies are at play with AC charging vs. stepping up voltage for DC charging direct from panels, but I am not certain of that.
I am not saying they could not help or be useful on a car, but rather, for dollars spent on PV panels, there is far far more bang for the buck to be had with permanent home installations.