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I think UMN did a study with 4 hour storage plus solar on the grid a few years back. https://energytransition.umn.edu/modernizing-minnesotas-grid-an-economic-a

• coldpie 4y ago
  Thanks, this was informative. It wasn't clear to me, but I think the study does not account for switching heating from burning NG in the dwelling to electricity. I don't have numbers, but I'm pretty sure that's going to introduce an enormous load on the system, and is my main source of skepticism for wind/solar/storage as a solution for all electricity generation in places like Minnesota.