Someone with generation that takes time to curtail will need somewhere to put it; at the limit, they may pay someone else to take it. Also, some generators are getting paid in multiple ways, if you're getting a subsidy for every kWh you put on the grid, you might be willing to pay for the privilege of putting it out there.
I agree though, if the typical case is negative pricing, during solar peak, it doesn't make sense to build more solar capacity. One trend is to have solar panels oriented toward morning or evening sun rather than midday sun, less kWh generated overall, but possibly more valuable kWh due to time of day.
If you get enough grid accessible battery capacity, during normal conditions, the price ceiling falls and the floor raises. Of course, when all the batteries are full or empty, the price can go negative again.
I agree though, if the typical case is negative pricing, during solar peak, it doesn't make sense to build more solar capacity. One trend is to have solar panels oriented toward morning or evening sun rather than midday sun, less kWh generated overall, but possibly more valuable kWh due to time of day.
If you get enough grid accessible battery capacity, during normal conditions, the price ceiling falls and the floor raises. Of course, when all the batteries are full or empty, the price can go negative again.