That’s actually a good idea. An EV wants its heavy batteries to perform well but to repurpose them in a static setup while still some useful capacity and to store energy for overnight distribution helps.
Storage is half the problem. Take the UK for example
That’s a typical scenario of we consume more in evening when solar is less strong. The yellow line is solar input (peaks at noon)
So if you can store solar energy from it’s peak generation at noon to be put into the grid at the peak demand of evening, we’ve then needed to use of other sources which in UK’s case is gas burned at power stations.
It makes sense for a sunny place like California to use plenty of solar. Other places can make use of hydro or wind.
My own view is we have to use:
- significant storage sources to move peaks of supply into peaks of demand
- any locally useful renewables (solar, wind, hydro, geothermal, biomass, etc)
- nuclear for when storage isn’t sufficient and renewables not sufficient - e.g. for winter when an otherwise plentiful solar isn’t as available.
Anything we can do at home to move demand into peak renewables helps, e.g. if you do live in a solar plentiful supply area to make your discretionary demand go there. Say you did have an EV, recharging it from solar in the mid-morning to mid-afternoon makes sense.
