| We are going through the same thing in Australia. In fact I suspect it's happening everywhere with solar. The current solutions look to be market based, which boils down to getting rid of "one fixed price per kWh" and moving to something closer to paying whatever the wholesale market is charging. Not exactly that as the wholesale market is wild. It can varying by over a factor of 1000 during the year. What has happened is time of use charging which boils down to different fix rates for different times of the day. Controlled loads, which translates to the supplier being able to forcibly turn off things in your house. If you agree to that for your car charger for example, you get to pay about USD $0.05/kWh to charge your car. And there are demand charges, which means you don't pay per kW/h used but rather your peak draw in kW over a 3 month period. Net metering was never a thing here, but now they can forcibly turn off the feed-in. In return they where used to set the maximum feed-in very conservatively based on how much the grid could absorb form every panel in the suburb at the worst possible time, now they will take the maximum your wiring supports. Finally they now allow households to form themselves into power plants, that sell the power they generate / store directly on the wholesale market. Meanwhile, the story is talking about grids disallowing net metering as a big step. It ain't a big step. It wasn't even a first step for Australia, as the distortions it caused were obvious so it was never allowed. It looks to me like Australia has largely solved the day to day "grid instability" problem the article talks about. We do have places whose yearly average is 70% renewable, and they are fine. I'm not so sure about how them solving the "sun hasn't shined and the wind hasn't blown" for a week issue. It's not insurmountable as even on cloudy days, solar outputs 20% of peak. However, right now the solution in that 70% state is gas peakers. |