This is built in to wholesale energy markets and well understood. Energy prices go negative with some degree of regularity and it is built into the system.
If you already have a grid interconnection and a handy energy sink, you can definitely make money just buying excess power for a negative price at certain times. So far, though, it's not quite frequent or extreme enough to justify a bespoke infrastructure investment.
And if you're going to make some kind of investment, better to spend money on some kind of energy storage tech (i.e a chemical or physical battery.) Then you not only take excess power off the system when it isn't wanted, but also help power the evening peak when usage ramps up just as solar is ramping down.
If you already have a grid interconnection and a handy energy sink, you can definitely make money just buying excess power for a negative price at certain times. So far, though, it's not quite frequent or extreme enough to justify a bespoke infrastructure investment.
And if you're going to make some kind of investment, better to spend money on some kind of energy storage tech (i.e a chemical or physical battery.) Then you not only take excess power off the system when it isn't wanted, but also help power the evening peak when usage ramps up just as solar is ramping down.