How do areas with wind and solar power to keep their power?

solar power well-known in the product: question pirune E : How can areas with wind and solar power to preserve their power Some areas rely on the Law of the solar and wind? To power their properties and others. How they use power at night or when there is no wind? Do they have a thing that retailers energy like a large battery or one thing else? I have to "make" a green city, and it is a renewable power supply, like use of solar and wind power. How could I make wind and solar power

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