Comment by eliben

4 hours ago

During certain hours of the day in California, electricity is essentially free due to solar overproduction, which sometimes causes negative wholesale prices.

I've never quite understood negative electric/gas/oil prices.

Are you literally paid for agreeing to receive the energy?

  • Yes. Counterintuitive, but it make sense when you take all the factors into account (such that completely shutting down and then later restarting turbines may cost a generator more than paying someone to take power off their hands).

  • Yep. Last August the total cost to charge my car for the month was -10SEK of about -$1.05 US, as my energy company was trying to put load into its batteries at the times when the grid most needed it.

  • Yes, if you’re a battery in the system. Basically discourages generation because there’s too much supply. But this generally doesn’t trickle to consumers afaik.

  • Easiest to understand with oil. During Covid the price of oil went negative. So you’d be paid if you bought that oil.

    Sounds like a great deal right? But now you’re on the hook for receiving and storing that oil. That costs money, it’s not free. That’s why the price went negative - the seller was trying to offload and there were no takers at $0.