this post was submitted on 02 Oct 2024
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Call me stupid, but why don't they just charge enough to cover costs and a bit of profit? The current pricing model is broken if you can't run a solar plant profitably.
It is all quite complicated.
A renewable producer (e.g. solar panels) cannot produce energy 24/7. And when it produces energy, you are not guaranteed the production is stable.
A consumer cannot consume energy 24/7. And when they consume energy, you are not guaranteed the consumption is stable.
To make the issue worse, a producer may not be producing energy when the consumer wants it, and vice versa.
Currently, energy storage is not widely installed. Hence any produced energy must be consumed at the same time.
The factors above combined means that there will be a mismatch. If the production is too great, your electricity appliances will probably explode and whatnot. If the consumption is too great, you experience blackouts. Neither are desirable.
Now consider there is a middleman. The grid. Producers sell energy to the grid. Consumers buy energy from the grid.
At some point in time, due to the factors above, the grid will need (A) zero to negative prices to encourage consumers to buy & use more energy from it, and to encourage producers to produce & sell less energy to it. Or (B) increased prices to encourage consumers to buy & use less energy and producers to produce & sell more energy. A flat price is not realistic. (Residential users only have a flat rate because our demand patterns are more stable.)
But due to the production patterns of renewable energy and consumption patterns of our society, there is a not-insignificant risk that renewable producers will consistently face scenario (A) above making it difficult to cover back the costs.
Number 2 is not inherently true. We can incentivize time-of-use, and push it to time-of-generation. Not with all loads, of course, but with a lot of them, and a lot of very heavy loads.
Our old nuclear/coal model pushes a lot of these loads overnight to reduce daytime demand and "level the curve". Steel mills and aluminum smelters often operate overnight and shutdown during the day, because that is what nuclear and coal needed.
With solar and wind becoming predominant, we need to reverse those overnight, "off peak" incentives, and push consumption to daytime hours.
The concept is known as "demand shaping". It is an underutilized method of matching production and consumption, but it is essential if solar and wind are to become our primary source of power.