Power-to-Power

Electricity cannot itself be stored on any scale, but it can be converted to other forms of energy which can be stored and later reconverted to electricity on demand, reducing imbalances between energy demand and production. Energy, however, comes in multiple forms including radiation, chemical potential, gravitational potential, electrical potential, electricity, elevated temperature, latent heat, and acceleration. Storage systems for electricity include battery, flywheel, compressed air, and pumped hydro storage.

Subcategories

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Electrochemical

Organic Flow Battery
Vanadium Redox Flow Battery
High-Temperature Battery
Lead-Acid Battery
Li-Ion Battery

Mechanical

Flywheel Energy Storage
Pumped-Storage Hydroelectricity (PSH)
Compressed-Air Energy Storage (CAES)
Liquid-Air Energy Storage (LAES)

Electrical

Superconducting Magnetic Energy Storages
Capacitors