That doesn't make sense, do you have data for that? Best I can find is that we (the US) has the ability to store somewhere around 1% of our generation capacity,

That doesn't make sense, do you have data for that? Best I can find is that we (the US) has the ability to store somewhere around 1% of our generation capacity, rounding up. Here in California we spend absurd amounts maintaining gas plants that only run during high demand periods, despite only having 6.6GW worth of storage for a state using 300 TWh per year. We are only 13% to our 2045 goal, so if it was cost-effective to do, we would already be doing it. Without the storage, all of that day time generation is pointless, we need either gas or nuclear at night anyways, so the cost isn't really affected.