179 megawatts of solar power just switched on in Nevada

[Osmeric]

Add the fact that if you use storage, you will have enormous energy losses (under 50% is the best non chemical storage I am aware of in terms of efficiency, best chemical is 90% -ish, but it is extremely expensive to run and totally not green).

Some 96% of the grid connected storage existing today is pumped hydro. Round trip efficiency of pumped hydro is 70-80%.

[Gaaz]

Some 96% of the grid connected storage existing today is pumped hydro. Round trip efficiency of pumped hydro is 70-80%.

Ugh... Not going to argue with that. For example, Dinorwig Power Station claims a 75% efficiency cycle. For some reason I was fixated on small scale storage that is less efficient. I really need to go to sleep . These things cost like a nuclear power station though. The Dinorwig Power Station has a 9GW total storage (9 hours of a single VVER-1000 running full capacity), and cost $5.6 billion in today's money. As I mentioned before, you can really build a 2.4 GW nuclear station for this amount. And it will not run out of juice in 4 hours. But yeah, I stand corrected. You can store 75% -ish with those.
That actually got me thinking - 9GW is about the capacity that is needed for the OP solar plant to store 10 days of energy reserve. Guess they should add something like that to the bill.