I remember seeing academics analysis of various storage methods that showed how none of them could be scaled up to store 7 days worth of energy. And thus solar

I remember seeing academics analysis of various storage methods that showed how none of them could be scaled up to store 7 days worth of energy. And thus solar and wind were infeasible. There were two problems. One he was using 7 days worth of storage. It's true that in the fossil fuel industry 7 days of storage is standard. But that's because coal/oil/gas have supply chain issues to deal with. So he was intentionally increasing the required storage 10 fold. The second. He studiously avoided any mention of thermal storage methods. Or using natural gas as a back up. Both of which can be scaled up to meet his 7 day storage requirement.