I did look into this.
There was a low cost power provider in our area that was offering a really low rates per watt and it sounded like a good idea.
Until I researched it and found: I would still have to pay the original power provider (PG&E) for "transmission fees". This is the cost to use their lines. So If I would have switched I would have payed a lot more.
Be carefully, it could be too good to be true.