Wind and solar need storage diversity, not just capacity
In Germany, the Energiewende policy has driven renewable energy penetration above 50%, yet the reliance on seasonal storage and electricity imports during winter
The answer is in batteries, and other forms of energy storage. Demand for power is constantly fluctuating, and it's not uncommon to have periods of time when conditions for solar and wind energy generation allow us to draw far more power from these natural sources than the grid demands in that moment.
The more solar and wind plants the world installs to wean grids off fossil fuels, the more urgently it needs mature, cost-effective technologies that can cover many locations and store energy for at least eight hours and up to weeks at a time.
Mechanical Energy Storage: Energy is stored through mechanical means, such as compressing air or using flywheels. Compressed Air Energy Storage (CAES) and flywheels are examples of this technology. Hydrogen Storage: Surplus electricity is used to produce hydrogen through electrolysis.
Energy storage is important because it allows us to manage changing demand and ensure that the electricity grid can keep up with varying power needs. By storing excess power, we can prevent outages, such as those caused by a lack of sunlight or wind.
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