I have posted this before, but I will re post, this isn’t meant to be typical, its expensive, and it won’t work for everyone.
But it can work for alot of people who have decided that the energy costs and ICE cars have their days numbered.
We have an excellent south facing roof with 4kwh of solar panels.
We typically get around £800 from the feed in tariff, tax free.
Nissan Leaf car, which can be charged directly from the energy off the solar panels (when the sun is out). This will reduce the energy running cost of the EV car quite a bit.
We then decided that it would make some sense (although not entirely spreadsheet return on the investment) to have a Tesla Powerwall 2 battery installed.
This prevents the excess energy being exported to the grid, ( but we still get paid for this, as the calculation assumes you export 50% of the energy).
So, we can use the stored energy in the PW2, to run the home or charge the Leaf.