In the 1950s, flywheel-powered buses, known as , were used in () and () and there is ongoing research to make flywheel systems that are smaller, lighter, cheaper and have a greater capacity. It is hoped that flywheel systems can replace conventional chemical batteries for mobile applications, such as for electric vehicles. Proposed flywh. These mechanical marvels convert electricity into rotational kinetic energy, spinning a mass at up to 50,000 RPM in near-frictionless environments. "A 10 kWh flywheel unit can deliver 500,000 full-depth cycles – about 10× more than top-tier lithium batteries."
[pdf] Flywheels store rotational kinetic energy in the form of a spinning cylinder or disc, then use this stored kinetic energy to regenerate electricity at a later time. The amount of energy stored in a flywheel depends on the dimensions of the flywheel, its mass, and the rate at which it spins.
[pdf] The Government of Somaliland has received financing from the World Bank toward the cost of Somali Electricity Sector Recovery Project, and intends to apply part of the proceeds toward payments under the Contract Design, Supply, Installation, Testing, and Commissioning of 12MWp Solar PV Power Plant with 36MWh of Battery Energy Storage System Including a 13.5km of 33kV Evacuation line for BEC, Berbera , Somaliland.
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