[stale2002]

Solar power REDUCES peak grid usage; it does NOT increase it.

When do you think solar power is producing the most electricity? In the afternoon on a hot summer day.

When do you think peak grid electricity usage peaks? In the afternoon on a hot summer day!

Solar power helps get rid of the peak electricity usage problem. If anything, power companies should be paying solar users even more, because they are reducing costs for the power company, not increasing them.

[rhino369]

It reduces peak grid usage on average. But you still need replacement gas plants on standby ready to start up when clouds go over for 20 minutes on a hot day. So you save money on not burning as much natural gas, but it doesn't reduce the amount of peaker plants you need to have.

I'd be all in favor of having solar power sell at the going rate that utilities are paying. But that's not how it works. And that's not how solar advocates want it to work.

[extrapickles]

While solar and wind reduce peak demand, they have problems where they can suddenly loose a significant fraction of their output capacity (lull in wind, clouds) and that capacity has to be filled in by traditional peaking power plants, otherwise the grid will fail. Also the amount of power generated is not very predictable[1], and peaking/load following plants are needed to remain in standby to cover the shortfalls as the base load plants can take quite a while to respond to shortages in the supply of power.

[1]: https://www.ise.fraunhofer.de/en/downloads-englisch/pdf-file...

[brianvan5155]

It's creating new peaks at previously non-peak times.

We don't know precisely what effect that will have on the grid utility business, or what effect that will have on overall grid supply price rates. One could argue that grid power should get cheaper... one could argue that there would be a net canceling effect among all the factors involved... or one could much more reasonably say that it's a chaotic system so no outcome is guaranteed.

Disruption!

[lambertsimnel]

Why does grid electricity usage peak on hot summer afternoons? If it's because of air conditioning, it's probably not universal.

I imagine hot summer afternoons are a time when factories operate below capacity (or not at all), and people heat their homes less and spend more time outside away from TV, etc.

[ptaipale]

Certainly not universal. Could be true in California or Texas, possibly. For sure it's not here.

Where I live, the peak is a winter morning which is windless and therefore particularly cold, at 8:00 (before sunrise). Solar output is zero, wind power output is zero. Everyone turns extra heaters on, puts the kettle on to make a hot cup before taking a warm shower.

[stale2002]

The point isn't that it is 100% universal for all places. The point is that it is true for most places.

[ptaipale]

[citation needed]