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Germany Had So Much Renewable Energy That It Had To Pay People To Use Electricity (qz.com)

Quartz reports Germany produced so much renewable energy on Sunday, May 8, that commercial customers were being paid to consume electricity: "Thanks to a sunny and windy day, at one point around 1pm the country's solar, wind, hydro and biomass plants were supplying about 55 GW of the 63 GW being consumed, or 87%. Power prices actually went negative for several hours, meaning commercial customers were being paid to consume electricity." Many critics have argued that renewable energy will always have only a niche role in supplying power to consumers, given its daily peaks and troughs. With that said, Germany plans to hit 100% renewable energy by 2050. Denmark, for example, has already generated more electricity than the country consumes from its wind turbines. It now exports the surplus energy to Germany, Norway and Sweden.

15 of 298 comments (clear)

  1. If it becomes a regular thing by rmdingler · · Score: 4, Informative
    There are several ways to store excess electrical generation if it becomes a common enough occurrence.

    Outside of pumping water to heights or using conventtional battery storage, there are NEW IDEAS emerging all the time.

    --
    Happiness in intelligent people is the rarest thing I know.

    Ernest Hemingway

  2. Opportunity by AK+Marc · · Score: 5, Insightful

    This is how it's supposed to work. Renewables are often less predictable. So have a realtime bidding service, and when it's "negative" use as much as you can to charge batteries, then when the number is positive again, get paid to push electricity back into the grid. This will subsidize people buying batteries, which will smooth out the distribution of less predictable power sources. It's working as designed, just without batteries in place, yet. Charge your car at cheap times, and feed the grid at expensive times (from car or home). Win for all, and great for the environment.

  3. As it should be, false headline. by thesupraman · · Score: 5, Informative

    It certainly is, if you look at the graph in the article you will easily see that there wasnt a particularly high amount of renewable energy being generated - this price
    jump looks far more like someones pricing algorithm glitching than any actual market movement - there is little difference in the previous and subsequent pattern,
    and the price certainly did not jump there. I would make an educated guess looking at the graphs that someone had a shutdown delay on a system and that may
    have glitched the market a touch, causing a reaction in the algorithmic pricing models.

    Yet another case of sensational headlines trying to sell a non-story.

    The headline really should read 'German spot-price for energy collapses for no obvious reason, another algorithmic realtime pricing glitch?' or similar.

    But you have to bait the clicks somehow apparently, so much for journalistic standards..

    1. Re:As it should be, false headline. by sjames · · Score: 5, Informative

      Look again, they were producing above consumption already, then renewable energy jumped to what looks like the point that they couldn't drop conventional generation any lower without shutting down base load (expensive and takes a good while to recover from).

      They very likely hit a discontinuity in the pricing algorithm at that point, but it appears quite reasonable that they were in an overproduction situation and needed to dump supply.

    2. Re:As it should be, false headline. by lorinc · · Score: 4, Interesting

      I don't think it's a glitch. It looks rather typical of this kind of dynamical systems.

      When the gap between the red curve and the green area goes below a certain threshold, that means that you have an excess of power that has to be dissipated otherwise the generator breaks. The optimal price is fairly easy to compute in that case : it's minus the total cost of the repair in case of not seeling the electricity. That means you are willing to pay somebody to take your electricity as much as it would cost you to repair your system in case nobody buys, but no more.

      I think this is also a feature of the decentralized nature of renewables. Not all producers are able to dissipate all their energy because it depends on local (local climate, local network, local consumption, etc) and global variables (global production, global network, global consumption, etc), which makes everything barely predictable.

    3. Re:As it should be, false headline. by Beezlebub33 · · Score: 5, Informative

      This is a common misconception. You would think that you should be able to just have the generators running and producing power and just have it go nowhere. The end consumer just plugs in their computer and starts up, so it _looks_ like it is a infinitely scalable source of power, and it doesn't really matter if you are running it or not. In practice, there has to be a careful balance between the amount of energy produced and the energy consumed. Too little power being generated and you get brownouts / the voltage drops. Too much power and you have too high voltage / exploding transformers.

      The time scale for balancing is on the order of seconds. They do this by having a variety of different sources of power, including base load (coal, nuclear for example) and quick response (some hydro, gas turbine) and pushing / pulling power from other locations that either have too much or too little, or having pumped hydro storage, or having some consumers that have power needs that you can control. Renewable power is one part of the power equation, and in some ways it is good (since it peaks approximately during peak power needed) and in some ways it is bad (you can't control it or demand more when you want more).

      --
      The more people I meet, the better I like my dog.
  4. Re:My B.S. meter is in the red by guruevi · · Score: 5, Informative

    You do have to consider that Germany's power prices are about two to three times as high as in the U.S and have risen 30% in the last decade (20c/kWh to 30c/kWh). Tesla harnessed some really cheap renewable energy in the early 1900's and it's still going, stable regardless of the weather. I pay 8c/kWh for primarily 'renewable' energy from (Niagara Falls) and it's relatively cheap to maintain as well.

    Please also note the graph in the article. That looks more like a trading issue/glitch (energy gets traded much like stock on a stock market) because the actual power generation was higher later on without a massive dip.

    --
    Custom electronics and digital signage for your business: www.evcircuits.com
  5. Re:Thats really cheap by ShanghaiBill · · Score: 4, Informative

    How does Denmark push its electricity to its neighbours Germany, Norway or Sweden, when they are doing the same?

    Because the wind doesn't always blow everywhere at once, but it is always blowing somewhere. Wind energy is more reliable when it is geographically dispersed, so one region's peaks can fill another region's troughs.

  6. Re:Renewable energy can work. by riverat1 · · Score: 5, Insightful

    But at what price? Germany pays three times the price for power that the US does.

    I don't really want a $1,200 power bill, thank you very much.

    As others pointed out Germany doesn't pay 3 times what we pay in the USA but they do pay a bit more. But the real question here is how much is it going to cost you in 20 or 30 years when the effects of AGW really start kicking in and we're spending big money on trying to adapt. Are you really saving anything in the long run by hanging on to your cheap power now?

  7. I live in Germany... by bkmoore · · Score: 4, Informative

    ...and for residential customers, Germany has some of the most expensive electricity in the world. Residential customers and small businesses pay a "renewable energy tax" (EEG) of 6.354 cents / kWh as of 2016. I have a large family, so this works out to be about 440€ additional tax burden per year, not counting the 19% VAT added on top of the EEG tax. So I am paying for all this "free electricity". This tax is highly regressive and hits poorer residents much harder because they cannot afford to invest in energy-saving appliances.

  8. Re:Renewable energy can work. by hvdh · · Score: 4, Informative

    You cannot get a $0.15/kWh power plan in Germany for private homes, only for large industrial plants.
    The cheapest price (by kWh) I can get for my German home is 0.23€ ($0.26) / kWh plus 60€ ($69) per year, so it's 0.25€ ($0.28) / kWh in total.

    Latest statistics say the average price for private customers is 0.28€ / kWh:
    http://de.statista.com/statist...

  9. Time to change your car by seoras · · Score: 4, Insightful

    Now imagine you had an electric car parked up outside, with some big ass batteries in it, plugged in and storing that surplus energy.
    As if surplus power is a problem?
    It isn't, we just haven't moved forward quickly enough and away from fossil fuels.

  10. Re:Thats really cheap by Fragnet · · Score: 4, Insightful

    To understand Germany's energy use, just look at this graph. 75% of it is fossil fuel based. The idea that it had so much renewable it had to pay people to use it is ridiculous and simply a function of the bureaucracy, not the reality.

  11. It happens every day by ras · · Score: 4, Insightful

    Here is a graph of electricity prices where I live for the current day: http://www.aemo.com.au/Electricity/Data/Price-and-Demand/Price-and-Demand-Graphs/Current-Dispatch-Interval-Price-and-Demand-Graph-QLD. Note the red line (whole sale price) drops off the bottom graph in the small hours of the morning. It's negative.

    At least were I live it has nothing to do with renewables (the sun ain't shining at that time after all). Oddly it is because coal plants suffer the same problem renewables - they can't control the power quickly. No one is using power at the coal plants are producing at 3 AM so there is an oversupply, and it's costs more to shut the plant down for the hour or so than it does to pay people to find ways to use it.

    This happens just about every fucking day! How is this news?

  12. Volume of nuclear waste by shani · · Score: 5, Funny

    I was skeptical so I checked.

    Apparently the US has about 250 tons of nuclear waste. That should indeed fit in a not very large room - you could fit in barrels in a 20x20 meter room.

    I do suspect that putting that much nuclear material in one room is a bad idea.. ;)