Batteries currently cost about as much as the solar panels needed to charge them. You have to be able to charge the batteries about 3 times faster than they are discharged since there is maybe 8 hours of daylight and 24 hours of usage with the AC running 24 hours to keep the house at a certain temp.
And the batteries will need to be replaced every 5-10 years as they wear out. Solar panels need to be replaced every 20-25 years.
A better goal is to have houses running everything but the AC on clean energy in the next 10 years.
The market will naturally gravitate towards cheaper alternatives. The environmentalists are using flawed economics 101 logic that says that costs go down as demand goes up. They don't realize or don't want to admit there is a limit to how low the prices can go. And we are no where near economical no matter how many people are forced to buy solar panels.
There's a reason ObamaCare didn't lower prices. Demand isn't a magic wand to lower high prices and high demand is perfectly capable of causing the prices to go up as well as lower it.