Quote:
Originally Posted by oil pan 4
40 miles per day from solar panels on an EV is sky high over optimistic, anyone one who tells you that is hopelessly optimistic and likely a math illiterate.
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Taking clouds, Earth curvature, the angles of the Sun rising and setting, the period called "night" and your common solar panel's efficiency all into consideration the MATH says that for every square meter of your common solar panel that's facing directly up in an average place on Earth with avearge weather at an average time of the year you get 1.5 kWh per day.
Aptera says they will have 3 square meters of solar panels.
Doing the actual MATH says:
3 x 1.5 kWh = 4.5 kWh
4.5 kWh x 89% from PV to battery efficiency = 4 kWh
Aptera claims 10 miles per kWh.
4 kWh x 10 = 40 miles... in an average place on Earth on an average day.
According to those numbers there will be days and places on Earth where much more than 40 miles in a day would be possible.
The only people who assume that solar on a car is overly optimistic also assume an Aptera will get the same or worse efficiency as a Tesla Model 3 at only 4 miles per kWh.
Quote:
Originally Posted by oil pan 4
Potentially you could buy $1,500 worth of panels, get about 3kw of capacity which I'm is the minimum amount of use able capacity. But you still need racking, grid tie in which is varying from electricity provider to electricity provider and state by state.
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"Potentially" doesn't provide a real alternative and even if it were possible to throw some solar panels on a roof and hook them up for a reasonable price it still wouldn't address every use case scenario for solar panels on a car.
Just because throwing solar panels up on the roof of a house has it's advantages doesn't mean a thing if you have too many hurdles to pull it off, especially if it ends up costing you significantly more per actual kWh obtained than what could be made from off the car's solar panels.
And even if you could get 4 kWh per day, averaged, from PV to EV battery from solar panels on your house for less than the $1,500 in question it still wouldn't fit every use case that solar on a car would.
If Aptera's solar panels work as advertised, Aptera wins. If they don't, Aptera loses.