[Perfectlap]

The expensive battery problem has many solutions. Nissan/Renault are cooking up a line of electric cars where rather than having bespoke batteries for each type of car, we'll have interchangeable batteries which are handed off at a gas station and a full charged one is put in. Solar panels could charge the batteries during the day and cheaper overnight rates would be used to charge the drained batteries.
Well at least that's how I understood it.

Sounds almost toooo logical.