The great thing is that those generating solar power can turn it off in a millisecond, they won't pay anything they don't want to pay. (Though depending on cont

The great thing is that those generating solar power can turn it off in a millisecond, they won't pay anything they don't want to pay. (Though depending on contracts or even subsidies, they may be getting some amount of profit even when prices are nominally negative on the grid.) It's traditional thermal generation like natural gas, coal, and nuclear which can't be turned off in time, and they are the ones paying the negative prices.