> Solar peaks around noon 12:00 pm - 2:00 pm (I am being charitable here) do we have solid storage that would hold this generated power for delivery from (4:00

> Solar peaks around noon 12:00 pm - 2:00 pm (I am being charitable here) do we have solid storage that would hold this generated power for delivery from (4:00 pm - 7:00 pm) peak ? In limited deployment? Yes, absolutely. Sodium batteries make this proposition cheaper. You could make your house entirely off-grid and run-off-storage if your local production options are good. > That 4 to 6 hour storage window is still a big issue - if you are talking about Sodium batteries we are a decade or more away from them to be grid scale! No, we're not 10 years away from using sodium ions batteried at this scale. The bulk scale problem is MUCH easier than the micro-scale package problem. Ongoing work on sodium ion batteries will be to work on equivalent package competitors for lithium ion polymer batteries, which still have unparalleled density. For less robust, large packages the work is done, the compound required is done. We already use old and inefficient batteries in these applications. It's one of Tesla's major business models and why they take your battery pack back from you at the end of life of the car.