Those of us “of a certain age”
will remember Nuclear Power advocates claiming
“it will be so cheap no house will need an electric power meter”.

Less remembered are the “backyard nuclear batteries” for each house that only needed to be swapped out every 50 years.
My Thermodynamics professor had a detailed engineering drawing of such a home backyard buried nuclear battery on the wall of his office.

If you have visited older US Nuclear Power plants you have probably seen the large gravel parking lot-like areas with the large stainless steel casks containing “aged” nuclear waste still giving off heat. I was told if those were allowed to have “thermoelectric junction DC power units” inside next to the radioactive fuel elements they could generate 5 kilowatts each. Instead they just heat the outside air.

Some long life space probes have nuclear heat thermoelectric junction generators..

If each electric car had a 3 kw nuclear battery, over 24 hours of each day it could recharge its 70 kw-hr battery.
Judging from the size and weight of the space probe generators, it might add only 100 lbs or so.