Historically, thermal concentrating solar plants were the only type of solar power equipped with storage. But as cheaper PV systems became dominant, thermal solar plants fell into disfavor. Now solar PV systems are beginning to integrate storage based on lithium-ion batteries, and this storage isn't just used to supply power when the sun is down; it is providing grid stabilization services too, which only adds complexity to an already-complicated picture for the future of storage - confounding attempts to model how much storage we’ll need, and of what kind, and when will we need it. Is a large amount of seasonal storage required on a high-RE grid, as some analysts have suggested? Or will other technologies reduce the amount of storage we’ll need? And can we even forecast that need, years or decades in advance? We’ll delve into all those questions and more in this deep dive into combined solar and storage systems.
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