As more homes generate their own power, typically with the help of state or federal subsidies, they're buying less electricity from traditional utilities.
Jeopardizing Grid PG&E Corp., California's biggest, has said this jeopardizes the power grid because there's less revenue to maintain the infrastructure. In response, utilities are raising rates, a burden that's a slightly heavier burden for people without solar power. In California they may eventually pass on as much as $1.3billion in annual costs to customers who don't have panels.
As I have said time and again in the past, Changing your source of power only does that, you are going to pay one way or another for what you use.