[Tsagadai]

Some home owners are doing this. Charge the batteries with solar in the day and top up with offpeak if more is needed for the early morning (say if you are using electricity for heating in winter). Not entirely off the grid but minimizing costs. I have talked to one industrious hacker who has two battery installations. He charges one off offpeak and feeds it back in for a profit in peak times while charging the other on solar and doing the same thing (because providers cap the amount of current you can feed back into the system as an individual). I am looking at getting myself a solar + batteries + grid system so it doesn't seem so far fetched that investors may be planning something similar.