If you’re describing nearly free and unlimited electricity as a problem, you may want to reconsider some things.
It’s a very capitalist way of thinking about the problem, but what “negative prices” actually means in this case is that the grid is over-energised. That’s a genuine engineering issue which would take considerable effort to deal with without exploding transformers or setting fire to power stations
Couldn’t solar farms just strategically disconnect some of their panels from the grid to avoid that? Solar panels are always collecting energy, but if you disconnect them that energy just goes into making them a bit warmer rather than overloading the grid.
The grid is always over energized. That’s not a problem. Large solar and wind farms connect to the grid with great specificity about the maximum amount of energy they will put on the lines. The problem would be not enough energy. Batteries are beginning to solve the dispatch energy issue with renewables. As long as republicans don’t get their way and ruin renewable energy with unfair fossil fuel mandates, the grid will continue to modernize in this way and we’ll be fairly independent of fossil fuels in the future for electricity.
Home owned windmills, solar panels and battery storage solves that.
Edit: Look at this awesome diagram of how it’s done for a hybrid setup that’s about $400 on Amazon.
Home owned windmills are almost a total waste. Its surprising how little electricity they generate especially given how much the cost to buy and install. Some real numbers. A 400w can cost almost $18k to buy and install. A 410w solar solar panel is about $250 + $3k of supporting electronics and parts. And that same $3k can support 10+ more panels. I looked into it myself really wanted it to be worth it for home, but it just isn’t. Now utility grade wind? Absolutely worth it. You need absolutely giant windmills with massive towers, but once you have those, you can make a LOT of electricity very cost effectively.
Solar panels worth it? Yes. Absolutely.
Batteries, not quite there yet for most folks. Batteries are really expensive, and don’t hold very much electricity $10k-$15k can get you a few hours of light or moderate home use capacity. For folks with really expensive electricity rates or very unreliable power this can be worth it financially, but for most every else. Cheaper chemistry batteries are finally starting to be produced (Sodium Ion), but we’re right at the beginning of these and there not really any consumer products for home made from these yet.
How, exactly, does that solve anything? It’s not like we can add some kind of magic automatic residential cutoff system (that would just make it worse) and residential distribution is already the problem! Residential solar is awesome (tho home batteries are largely elon propaganda…) but they only contribute to the above issue, not solve it. There are ways of addressing it, but they’re complicated and unglamorous.
Sorry for the naive question, but is it not possible to send the excess electricity to the ground (in the electrical sense)?
Not an engineer but I sometimes watch them on YouTube.
Could you not just set up a breakout point and have it arc to ground? If the power source is renewable then wasting a little when you have a full grid shouldn’t be a big issue. I’m thinking something along the lines of StyroPyro’s arcing plasma flamethrower should chew up plenty of excess power if you scale it up. As you ramp your total storage up toward 100% capacity I’d start shutting off inputs (disconnecting solars, etc) and then have what’s basically a big old Tesla coil to vent excess power over 95% capacity.
There’s obviously a lot of issues with that idea, but I’d like to throw my wholehearted support behind it anyways, just to see the expressions my FCC/Radio buddies would make when they realize someone’s running a MW-scale tesla coil as some kind of electrical blowoff valve. I can’t easily tell you the exact size of the area you’d utterly obliterate all radio communications in, but it’d be hilariously large.
Nothing an open/close gate couldn’t fix. The real problem is how overly complicated we feel we need to make things.
This is some real “basic biology” level thinking here. Even if it were as simple as “Pull the lever Krunk!” then you’ve just turned all that solar infrastructure into junk for the majority of the time that we need power.
People use the vast majority of electricity in a day in the afternoon and at night - times that are noticeably after the peak solar production time. So you have all that energy going into the system with nowhere to go because battery technology and infrastructure isn’t there, and then no energy to fulfill the peak demand. This is an issue nuclear runs into as well because a nuclear plant is either on or off and isn’t capable of scaling its power to the current demand.
There are times where power companies have to pay industrial manufacturing facilities to run their most energy consuming machines just to bleed extra energy out of the grid to keep it from overloading and turning into a multi-million dollar disaster that could take years to get people back on the grid.
In fairness, capitalist expansion is predicated on generating and reinvesting profit. If you build an array of solar panels and generate a revenue less than the installation+maintenance cost of the panels, you don’t have any more money to buy new panels and expand the grid.
That is, under a privatized system, anyway. If you’re a public utility and your goal is to meet a demand quota rather than raise revenue for the next round of expansion, profit isn’t your concern. You’re looking for the lowest possible installation/maintenance/replacement cost over the lifetime of the system, not the high margins per unit installed.
Incidentally, this is why vertically integrated private firms that consider electricity an expense rather than a profit center have been aggressively rolling out their own privately managed solar/wind arrays. When the concern is minimizing cost rather than maximizing revenue, and you can adjust your rate of consumption to match the peak productive capacity of your grid, then solar/wind is incredibly efficient.
I get the sentiment but… When sun isn’t shining the negative prices cause problem for baseline power producers who need to turn off their power plants to avoid the zero to negative power prices.
This causes the power prices to become volatile, since the investments for the power plants that run during the night need to be covered during the night only.
Eventually though the higher price volatility will encourage investments into either demand side adjustability or energy storage systems. This will play out in energy only markets.
The other alternative is to implement a capacity market, which will divide the cost of the baseline production across different production hours by paying producers more for guaranteed production capacity.
Ya I’m not an engineer at all so I’m not sure how hard it is to store that much power but that always seemed like a good idea. Even for electric cars, if we designed a universal battery pack good for a few hundred kilometres that we could swap out at recharge stations I feel like that would be a smart way to do things. But again I have no idea if thats feasible or how it would be implemented.
Much harder than you’d think, though there are some interesting schemes (like huge tanks filled with molten stuff, superconducting rings, giant flywheels). And there’s always a loss with storage.
TBH having a diverse array of power sources (including a little storage) is much better.
Also, batteries in electric cars are unfortunately extremely expensive, and extremely heavy. They’re less efficient than you’d think. Standardization and swappability (and reusing idle batteries for the grid) is a great idea, but even just focusing on the technical aspects, challenging.
interesting! ya this is a whole world I know very little about but it seems very relevant these days.
The problem with batteries is that they are costly to produce if we’re talking about ones that reverse chemical reactions. This is why I rolled my eyes at Elon suggesting we connect batteries to all our renewables. (The cost I learned from Factorio). Other types of batteries, like potential energy buffers are more practical, but also extremely location specific. There is a Technology Connections video about it. Also for example, some rollercoasters have flywheels to slowly build up rotational inertia and then release it all at once. So if we were to store the excess energy, it would probably be done so this way, but baseline power obviously just seems more practical
This feels like it is begging for further context.
Just install a bunch of spotlights that point back at the Sun so when power prices go negative you can return all that excess energy! Come on MIT, I thought you were supposed to be smart.
Isn’t it easier just to cover solar panels with reflective material, so they stop producing energy?
You can read the Technology Review article here discussing why this is problematic beyond a JPEG-artifacted screenshot of a snappy quip from a furry porn Twitter account that may or may not have read the article beyond the caption. We need solar power plants to reach net zero emissions, but even despite their decreasing costs and subsidies offered for them, developers are increasingly declining to build them because solar is so oversaturated at peak hours that it becomes worthless or less than worthless. The amount of energy pumped into the grid and the amount being used need to match to keep the grid at a stable ~60 Hz (or equivalent where you live, e.g. 50 Hz for the PAL region), so at some point you need to literally pay people money to take the electricity you’re producing to keep the grid stable or to somehow dump the energy before it makes its way onto the grid.
One of the major ways this problem is being offset is via storage so that the electricity can be distributed at a profit during off-peak production hours. Even if the government were to nationalize energy production and build their own solar farms (god, please), they would still run up against this same problem where it becomes unviable to keep building farms without the storage to accommodate them. At that point it becomes a problem not of profit but of “how much fossil fuel generation can we reduce per unit of currency spent?” and “are these farms redundant to each other?”.
This is framed through a capitalist lens, but in reality, it’s a pressing issue for solar production even if capitalism is removed from the picture entirely. At some point, solar production has to be in large part decoupled from solar distribution, or solar distribution becomes far too saturated in the middle of the day making putting resources toward its production nearly unviable.
In other words… Maybe 29 word Twitter captions aren’t a great way to discuss issues?
Nah, I see nothing wrong with an information diet composed of random people with no background sharing their pet conspiracy with 5 million people on TikTok that they learned from three minutes with ChatGPT, furry porn accounts clapping back on Twitter to an out-of-context 29-word quote from an MIT Technology Review article (reshared so many dozens of times that the quality has noticeably degraded), or a picture generated in a Russian disinformation farm showing a muscular Donald Trump rescuing crying orphans from drowning in Hurricane Helene while corrupt FEMA agents loot their houses.
God fucking help us.
In other words… Maybe paragraphs of word salad aren’t a great way to debunk an obvious truth?
I found the post to be succinct and coherent.
Some problems need 2 or 3 paragraphs to even begin to convey them. They could’ve said “the problem isn’t just capitalism,” and that would have been met with vitriol, as it doesn’t convey that the actual article is more nuanced than “anti solar,”that meeting variable power demand with solar supply is a challenge, that at some point one does indeed saturate regional demand for solar to the point that building more plants isn’t productive (which frequent negative prices are an indication of), and so on.
And if that’s too long and complex, well… I dunno what to tell you.
I’ve known about the issue with a lack of ways to store the energy produced for about 5 years now, does it seem like we’re making any steps in it recently? Also how does it work in a “green” fashion to produce all of the batteries necessary for that sorts of energy storage, I feel like that’s going to be one of the next discussions about how “pure” this method is.
The size of the storage problem is not well understood by most. The world production of batteries is insufficient to power germany with 100% renewables.
A possible solution is changing consumption patterns (in jargon known as demand-response). This runs into 2 issues: (1) people need to change their behaviour, with they wont. (2) You handicap your economy, to the benefits of countries that do not care about emissions. With a good chance that the net result is more emissions.