Energy storage power generation loss

By the time electricity reaches your outlet, around two-thirds of the original energy has been lost in the process. This is true only for “thermal generation” of electricity, which includes coal, natural gas, and nuclear power. Renewables like wind, solar, and hydroelectricity don't need to convert heat into motion, so they don't lose energy.

Energy storage systems allow energy consumption to be separated in time from the production of energy, whether it be electrical or thermal energy. The storing of electricity typically occurs in chemical (e.g., lead acid batteries or lithium-ion batteries, to name just two of the best known) or mechanical means (e.g., pumped hydro storage).

Traditional electricity generation has a thermodynamics problem: Burning fuel to generate electricity creates waste heat that siphons off most of the energy. By the time electricity reaches your outlet, around two-thirds of the original energy has been lost in the process.

Transmission and distribution cause a small loss of electricity, around 5% on average in the U.S., according to the EIA. The longer the distance traveled, the more the loss of electricity from transmission lines, and this energy loss is the same no matter what type of energy feeds into the grid.

The Energy Information Administration euphemistically describes these energy losses as “a thermodynamically necessary feature” of thermal electricity generation. But as the world looks to re-shape the energy supply, major losses of energy are neither necessary nor a feature of modern electricity.

The Electricity Storage Valuation Framework report proposes a five-phase method to assess the value of storage and create viable investment conditions to guide storage deployment for the effective integration of solar and wind power. Battery electricity storage is a key technology in the world's transition to a sustainable energy system.