These are numbers from the known far-right organization....err... Fraunhofer Institute for Solar Energy: https://www.ise.fraunhofer.de/en/publications/studies/cost-o...
> Solar is deployed at ~$2/watt and you're saying batteries are increasing that cost 2.5x to 10x?
Exactly. And you need closer to 100x for some locations (Germany) for the solar to be reliable enough.
Solar is _very_ cheap when you don't care about reliability, and impossible otherwise. Wind is a bit more nuanced, but in general has a similar story.