The way solar works in california for small installations is you just produce it and use it and whatever you do not use just send it to the electric company. If

The way solar works in california for small installations is you just produce it and use it and whatever you do not use just send it to the electric company. If you need power you are not producing then you just take it from the electric grid. The electric company has to take your excess power (by law). The electric company then subtracts the power you put in from the power you use and only charges you for the difference. So currently you do not have to worry about batteries or storage. You only have to worry about producing on average about as much as you use. The electric company does not have to worry about storage either because times of high sunshine always coincide with times of high electricity demand (due to air-conditioning). So currently one can easily install and use solar without ever worrying about batteries or storage. If we ever get to the point where we rely exclusively on solar and wind, we will have to start worrying about storage, but this point is far off for now. Also, at that point the responsibility for storage will likely fall on the electric companies.