This is great news in terms of econometrics, but I think the major looming questions still exist.

1/ Can solar impact CO2 emissions beyond single digit percentages?

2/ On what order of magnitude would battery storage capabilities have to improve to match performance characteristics of natural gas peaker plants or dare we say Oil/Natural gas?

3/ Don't the fluctuations in peak demand make solar less attractive because they require rapid natural gas peaking plants when there's increases in usage? (Outside of summer is a great example)

4/ What would be the desired performance characteristics of batteries that would make Solar a no-brainer for the environmental impact and actual viability? Cost, capability, and reusability.