In Canada, Ontario has pushed hardest on solar and wind power with massive subsidies. A friend there has 6 kW of panels on his house, purchased years ago when prices were much higher. That supplies the house and electric car, with the surplus sold to the grid at 85 cents per kWh, price guaranteed for 20 years.
The downside is that Ontario has a surplus of electricity on sunny days (base power load is supplied by nuclear plants that can't be shut in for daytime hours) and pays northern US states to take it. Ontario residents pay very high electric bills. This sounds really bad but it shows solar electricity can supply a good portion of electrical energy needs and has helped bring down the cost of solar. Perhaps it will soon be practical for many of us.
Personally I would like to drive a reasonably priced electric car before my driving years come to an end and computers take over the driving. I hope I'll be able to drive a motorhome until 2030.
