Editing Grid Storage and the Architecture of the Reservoir (section)

== <span style="color: #FFFFFF;">Remembering</span> ==
* '''Grid Energy Storage''' — A collection of methods used to store electrical energy on a large scale within an electrical power grid. Electrical energy is stored during times when production exceeds consumption, and returned to the grid when consumption exceeds production.
* '''Pumped-Storage Hydropower (PSH)''' — The undisputed king of grid storage (accounting for 90% of global capacity). It uses massive dams and two lakes. When electricity is cheap, water is pumped up the mountain. When electricity is needed, water falls back down through turbines. It is a massive "Gravity Battery."
* '''Lithium-Ion Megapacks''' — The modern frontier. Massive fields of shipping containers filled with millions of lithium-ion batteries. They cannot store power for months, but they are incredibly fast, instantly injecting power into the grid in milliseconds to stabilize sudden frequency drops.
* '''The Duck Curve''' — A graph of power production over the course of a day that shows the timing imbalance between peak demand and renewable energy production. It looks like a duck. Solar floods the grid at noon (creating a massive dip in net demand), and drops to zero at 6 PM right when everyone turns on their ovens (causing a terrifying, massive spike in demand).
* '''Duration (Short-term vs. Long-term)''' — The critical metric. *Short-term storage* (Lithium batteries) holds power for 4 hours; great for bridging the sunset. *Long-term storage* (Pumped Hydro, Hydrogen) holds power for 6 months; required for surviving a dark, windless winter.
* '''Compressed Air Energy Storage (CAES)''' — Using cheap renewable power to run massive air compressors, pumping high-pressure air into massive, empty underground salt caverns. When power is needed, the compressed air is released, heated, and used to spin a turbine.
* '''Thermal Energy Storage (Molten Salt)''' — Used primarily with Concentrated Solar Power. Mirrors focus sunlight to melt a massive tank of specialized salt to 1,000°C. The salt holds the heat for days. At night, the hot salt is used to boil water and spin a turbine, effectively generating solar power in the dark.
* '''Flywheel Energy Storage''' — A mechanical battery. Excess electricity is used to spin a massive steel or carbon-fiber cylinder in a frictionless vacuum chamber up to 50,000 RPM. When power is needed, the spinning cylinder acts as a generator. It only holds power for a few minutes but provides incredible, instantaneous bursts of energy.
* '''Vehicle-to-Grid (V2G)''' — The decentralized battery. A city might have 1 million electric vehicles (EVs) sitting parked. V2G technology allows the grid to pull a tiny amount of electricity from all 1 million parked cars simultaneously during a power crisis, effectively turning the population's cars into a massive, distributed national battery.
* '''Levelized Cost of Storage (LCOS)''' — The economic metric. Calculating the total lifetime cost of building the storage system, charging it, and discharging it, divided by the total megawatt-hours of electricity it will deliver over its lifespan.
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