"Feasible" here means things like "are you a hobbyist car mechanic", "do you have access to a car shop", "how much time are you willing to spend working on it"?

"Feasible" here means things like "are you a hobbyist car mechanic", "do you have access to a car shop", "how much time are you willing to spend working on it"? There are people who can easily say "yes" and "lots". For those it's feasible. Indeed, it's been done for decades. Six years ago I drove a borrowed converted pickup running on lead-acid batteries, with a solar panel in the back. The owner had acquired it used, and he had several other electric vehicles. He lived in the high desert, running 12 large solar panels, which he also used to power his house and his recording studio. He loved that he didn't have any 60 Hz noise on his recordings. For him it made sense. In Norway, which has a government policy to switch from oil to local hydropower, an all-electric car gets an exemption from car taxes, tolls, public parking, etc. and can drive in the bus lane. For someone in Oslo, a conversion can make sense. Since "feasible" and "make sense" depend on the person asking the question, neither I nor anyone else can really answer effectively, other than to point out that if the economics were really good then a lot of people would be doing it.