What is intermittency in renewables, and how do storage and diversification mitigate it?

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Intermittency means renewable power output varies because it depends on weather, time of day, and season, so generation isn’t constant and can drift away from what demand requires. Solar tends to surge during sunny hours and drop at night, while wind can rise and fall with atmospheric conditions, creating gaps that must be handled to keep the lights on.

Storage helps by capturing excess energy when generation is high and releasing it when generation is low, smoothing those ups and downs so the grid sees a steadier supply. Diversification, on the other hand, means spreading generation across different locations and different renewable types. Weather isn’t perfectly correlated across regions, and different resources respond differently to conditions, so if one area or resource underperforms, others can compensate. This reduces the chance that all sources are simultaneously low and improves reliability without relying on nonrenewable backups.

So, the effective approach combines storage to smooth fluctuations with diversification to lessen correlated shortfalls.