> But a single plant is really not interesting for the discussion at hand.
Maybe, but the UK has 4, and is building another 5 in the next 5 years.
Average grid consumption is somewhere around 30GW, the existing facilities have around 30GWh of storage. The additional 5 should bring around another 100GWh.
So we’re already at 1 hour’s worth of grid capacity stored, by 2030 we’ll be at 4 hours, and that’s assuming absolutely zero energy from other sources (wind, solar, nuclear, fossil fuel, biomass, other countries), although to be fair the existing facilities can only deliver at around 3GW, and the new facilities will only bring that up to 6GW.
I’m not sure if you’ve ever been to the UK, but a whole week without either sun or wind seems a bit unlikely, especially when half of the UKs wind comes from offshore wind farms.
Stick in a few more of these, and keep a couple of the existing fossil fuel plants around in case of emergencies, and I can definitely see how this continues to be just a “cost of doing business”.
I appreciate the situation in the US may be worse.