The 'duck curve' is solar energy's Why Japan has so many vending machines 3 months ago   03:58

Renewables require change in the energy supply chain.

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Electricity is incredibly difficult to store, so grid operators have to generate it at the exact moment it is demanded. In order to do this, they create incredibly accurate models of the total electric loads, that is how much energy will be consumed on a given day. But as utilities started to produce more energy from renewable sources like solar, the models started to shift as well.

California researchers discovered a peculiarity in their state’s electric load curves, that started to look more and more like a duck. And that duck shaped chart highlights the greatest challenge to solar energy growth in the US.

Vox writer David Roberts has been covering the issue for a few years now. You can read some of his past explainers on the duck curve, and its solutions at the links below:

And if you would like to read some of the source material used in the video above, you can check those out here: is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out

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Comments 5521 Comments

Halvard Bødalen
Water power can fix the problem
Sam Nolan
How can they use the quote about 0:24 whilst quoting one of their writers? This entire video is a quote from a Vox writer?
Chen 陈Xiao 晓
solution : Offer factories, commercial building and farming a more favorable electricity rate during day time than evening time. a lot of energy intensive operation in factories can be done during day time.
New Acc Who This Boof
A very big battery

Oh wait it's being built so problem solved???
Benjamin Tsui
I see so many angry comments about why vox didn’t discuss battery storage. Right now, battery storage is not economical at current battery prices. Therefore, it isn’t viable on a global and sustainable basis.
Manuel Vilaça
As a guy with with a Master in energy this video is completely stupid. The amount of solar produced now doesn't even make the tiniest dent in the demand.
Batteries store the energy not used in the day and if its full then it just exports to the grid. Really the solar energy's greatest challenge is centralisation dominated by the big energy companies and lack of most of the worlds governments to invest in solar for their people. I see miles of profit making solar panel farms all over Europe yet most people are still paying for energy.
Cristian Lopez
I guess we need to design bigger, and more efficient batteries. If a plant can store energy for the night time we can too.
Thomas Howes
This video is very interesting. Http://
Mertens Lachs
Just pump water up a hill and let it flow down at the night producing electricity
K. Chris Caldwell
The _"green energy"_ and _"Climate Change"_ scams.

So called _"green energy"_ is subsidized with wealth stolen from the people. Wealth turned to lurce that lines the pockets of the pols, crats, and connected.

Fracking has led to a glut of natural gas, and what is the best source of electricity generation to compensate for the irregular production from solar and wind?! Natural gas burning power plants.

The only _"green"_ is the wealth plunderd from the people, and the only _"Change"_ is the change in the scam from future freezing to future boiling. In the 70s the scam was the planet would grow colder and colder until temps ran away to freezing. Now its hotter and hotter until temps run away to a boil.

_Liberty is a demand. Tyranny submission._
Shrikant Shinde
Charge your electric vehicles in daytime when they're not in use and solar power generation is maximum. It's that simple.
Rumen Novachkov
If the energy cost less, less people will go for solar! It is not ecological, but will hold the so called BIG MANAGERS's problem and there pockets as well ;)
Jasper Zanjani
3:30 wtf did that duck just eat 😲
Gotham Nite
Barely a mention of batteries
Boohoo! Old school Power companies are crying because they know we don't need them as much as we used to, and one-day, very soon, we won't need them at all.
Tushar Sharma
A possible solution for shifting the solar energy to night time: A GLOBAL SOLAR GRID, half of which would produce solar energy because it will be day time and the energy thus, produced would be shared with the other side of earth where there would be no sun and thus no solar energy. This process will create a cycle of 24 hours where every place would produce energy for 12 hours, share half of energy which it would receive in the night time when other would be producing and sharing the energy.

However, this is a very simple model of what is ideally a herculean task.

Critical analysis is welcomed.
Roux Angélil
Martin Counsell
we need to arrange our lives around solar work hard use the energy when it's available, dull days = day off or sleep.
Maxine Harper
videeo too short!
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Why Japan has so many vending machines The 'duck curve' is solar energy's 3 months ago   04:47

What vending machines can teach you about this country

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While in Japan I noticed vending machines everywhere. Looking into it a little deeper a discovered that there's a very interesting answer to why Japan has so many vending machines. It's an economic story but it's also a story about how Japanese society values robotics and automation.

I even found a business card vending machine:

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