A flywheel energy storage system functions like a mechanical battery, storing energy in the motion of a spinning mass. This is similar to how a potter's wheel or a spinning top holds energy while in motion.
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All-in BESS projects now cost just $125/kWh as of October 2025 2. With a $65/MWh LCOS, shifting half of daily solar generation overnight adds just $33/MWh to the cost of solar.
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The Kalamazoo, Michigan, installation used Roofit. Solar's Velario system, which integrates high‑efficiency monocrystalline solar cells directly into standing‑seam metal roofing panels. The result is a roof that serves both as weather protection and as a power generator.
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Role in Tanzania: BESS addresses the intermittency of renewable energy sources like solar and wind, which are critical for Tanzania's energy diversification. It stores excess energy during peak production and releases it during demand spikes or outages.
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