Energy Shift
The Solar Power Duck Curve Explained
The Solar Power Duck Curve Explained
With the increasing demand for electricity as the world shifts away from fossil fuels, cleaner sources of energy like solar and wind are becoming more and more common.
However, as more solar power is introduced into our grids, operators are dealing with a new problem that can be visualized as the “duck curve.”
Origins of the Duck Curve
In a world heavily reliant on electricity, utility companies have gotten better at using data to anticipate demand and trying to operate as efficiently as possible.
Usually, power companies supply the least amount of power overnight while most consumers are sleeping, ramping up during the morning as people wake up and businesses get going. Then, at sunset, energy demand peaks.
Utility companies use models to predict demand and operate as efficiently as possible by supplying more power during times of higher demand. But the introduction of solar power has brought about problems in these demand curve models.
Since solar power relies on the Sun, peak solar production occurs around midday, when electricity demand is often on the lower end. As a result, energy production is higher than it needs to be, and net demand—total demand minus wind and solar production—falls. Then, when evening approaches, net demand increases, while solar power generation falls.
This discrepancy results in a net demand curve that takes the shape of a duck, and the duck curve gets more pronounced each year, as more solar capacity is added and net demand dips lower and lower at midday.
Why the Curve is Ruffling Feathers
The drop in net demand at midday basically creates two problems:
- Solar energy production wanes as the sun sets, just as demand for energy typically peaks. Utility companies are having to ramp up production to compensate for this gap, often overstressing a grid that is not yet set up for these peaks.
- Traditional sources of energy like nuclear and coal are only economic when they are running all the time. If you have to turn them off at mid-day because the power is supplied by solar, they become economically unfeasible.
Due to overproduction, solar power is already being wasted in some places where the technology is widely used, like California.
The problem is most intense during summer or spring when part of the solar panels has to be turned off to avoid overloading or even damaging the power grid.
Flattening the Duck
With more countries starting to rely on solar power, there are many potential solutions for the duck curve being explored (and implemented):
- Energy Storage: Overproduction of solar power during the day can be utilized by improving batteries and grid storage capacity.
- Powering Alternatives: Extra solar power can go towards powering energy generation at night, such as pumping water for hydroelectricity or overheating a material to dissipate energy later.
- Other Clean Sources: Unlike solar energy, sources like nuclear, hydroelectric, and geothermal can operate continuously and fill in the demand gap.
While grid managers study how to serve the new supply and demand, the duck curve is one of the greatest challenges facing renewable energy.
Energy Shift
Charted: Coal Still Dominates Global Electricity Generation
Fossil fuels account for nearly 60% of power generation.
Charted: Coal Still Dominates Global Electricity Generation
This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.
Key Takeaways
- Fossil fuels made up nearly 60% of 2024 electricity generation.
- Coal accounts for 35% of total power generation.
Fossil Fuels Still Power Most of the World
Global energy demand grew faster than average in 2024, driven by rising electricity use across sectors. The power sector led the surge, with demand growing nearly twice as fast as overall energy use—fueled by increased cooling needs, industrial activity, transport electrification, and the expansion of data centers and AI.
Despite a growing push toward cleaner energy sources, coal remains the leading source of electricity generation worldwide. In 2024, fossil fuels accounted for nearly 60% of global power generation, with coal alone contributing 35%, according to the International Energy Agency.
While renewable energy continues to expand, making up about one-third of total electricity production, the global energy mix still leans heavily on traditional sources.
| Country | Coal | Natural Gas | Oil | Renewables | Nuclear |
|---|---|---|---|---|---|
| 🇮🇳 India | 73.4% | 3.3% | 0.2% | 20.5% | 2.6% |
| 🇨🇳 China | 58.4% | 3.2% | 0.1% | 33.9% | 4.4% |
| 🇺🇸 U.S. | 15.6% | 42.6% | 0.7% | 23.3% | 17.9% |
| 🇪🇺 EU | 10.7% | 15.6% | 1.5% | 48.7% | 23.6% |
| 🌍 Global | 34.5% | 21.8% | 2.4% | 32.1% | 9.1% |
In emerging markets and developing economies, coal continues to be the backbone of power systems. China, the world’s largest energy consumer, generated nearly 60% of its electricity from coal. In India, coal’s dominance is even more pronounced, providing close to three-quarters of all electricity produced.
In contrast, advanced economies are increasingly relying on cleaner sources. In 2024, the European Union made significant strides in renewable energy adoption—nearly half of its electricity came from renewables, far exceeding the global average.
In the United States, natural gas led the power mix, accounting for over 40% of electricity generation in 2024. President Trump’s pro-coal policies and the surge in energy demand from AI innovation are expected to boost coal production in the U.S. over the next few years.
Learn More on the Voronoi App 
If you enjoyed this topic, check out this graphic that shows how 36 companies are responsible for half of the fossil fuel and cement CO2 emissions.
Energy Shift
How the Largest Importers of Russian Fossil Fuels Have Changed (2022 vs. 2025)
Despite sanctions against Moscow, the EU remains a key consumer of Russian fossil fuels.
How the Largest Importers of Russian Fossil Fuels Have Changed (2022 vs. 2025)
This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.
Since the war in Ukraine began on February 24, 2022, Russia has earned $915 billion from fossil fuel exports, with EU countries accounting for over $223 billion.
Despite sanctions against Moscow, the EU remains a key consumer of Russian fossil fuels.
This graphic highlights the largest importers of Russian fossil fuels, based on the daily flow of oil and gas, using data from the CREA Fossil Fuel Tracker as of March 2025.
China Becomes the Biggest Buyer
In June 2022, China overtook the EU as the largest importer of Russian fossil fuels. Today, China imports nearly six times more than the EU. India and Turkey have also emerged as major buyers.
| Country | 2022-01-14 (tonnes) | 2025-03-13 (tonnes) |
|---|---|---|
| 🇨🇳 China | 435,025 | 607,288 |
| 🇪🇺 EU | 928,998 | 104,646 |
| 🌍 Others | 244,945 | 275,747 |
| 🇮🇳 India | 28,907 | 344,848 |
| 🇹🇷 Turkey | 138,860 | 239,662 |
| 🇰🇷 South Korea | 93,267 | 30,255 |
| 🇺🇸 United States | 33,468 | 0 |
| 🇬🇧 UK | 49,062 | 0 |
Meanwhile, imports from the U.S. and UK, which were relatively small before the invasion, have dropped to zero.
EU Reliance on Russian Fuel
A report released by Ember estimates that European purchases of Russian gas amounted to €21.9 billion ($23.6 billion) in 2024.
Additionally, data collected by Kpler and analyzed by POLITICO Europe revealed that in the first 15 days of 2025, the 27 EU countries imported a record-high 837,300 metric tons of liquefied natural gas (LNG) from Russia. This has raised concerns that billions of dollars could be fueling Moscow’s war in Ukraine.
Russia’s Position in Global Oil Production
Russia remains one of the world’s top oil producers, frequently competing with Saudi Arabia for the second spot behind the United States.
Following the fall of the Soviet Union, Russia’s oil industry was privatized, but in 2021, the state forced a consolidation and restructuring of the sector. Today, Gazprom, Rosneft, and Lukoil are Russia’s leading oil and gas producers.
Learn More on the Voronoi App
If you enjoyed this topic, check out this graphic that shows Ukraine’s mineral resources.
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