It starts with a single cell.

It is the same lithium-ion battery technology found in your tablet, laptop and cell phone.


Over 44GWh of advanced battery manufacturing were online in 2012.

Grid battery systems from AES depend on prominent brand name suppliers that have been producing batteries for 20 years.



Batteries on the grid are always plugged in, so they never run out.

Batteries help to maintain balance between power plants and customers.


On the power grid, batteries can act as both generation and load, serving multiple functions:

Battery-based grid storage is in commercial operation today.

Moraine, Ohio
Dayton Power & Light
Elkins, West Virginia
AES Laurel Mountain
Northern Chile
AES Gener Angamos Power Plant
Atacama Desert, Chile
AES Gener Los Andes Substation

With 2 million MW-h of service delivered, AES has the most comprehensive and accomplished fleet of battery-based energy storage in the world.


There when you need it.

A 64 MW energy storage resource consists of 1.3 million batteries – each its own unit of power.

Compare this with a power plant, which typically has only 3 or 4 units, and the reliability implications become clear.

Grid battery arrays use massively parallel architectures to increase reliability and eliminate downtime.

If one of millions of batteries does not perform, the resource continues working.

Energy storage helps keep the lights on.


A meaningful grid resource.

 Battery-based energy storage shares a supply chain with the transportation and consumer electronics industries.

An established supply chain allows battery storage to become a meaningful grid resource.

Energy storage arrays are modular, making them scalable to hundreds of MW of capacity.

The manufacturing capability of grid-ready batteries can meet our needs over the next decade.

2024 cumulative new peaker plants in US

130 GW

2024 cumulative manufacturing capability of grid-ready batteries
Worldwide pumped hydro storage installed base
In the next 10 years, the cumulative manufacturing of grid-ready batteries will be greater than the installed base of pumped hydro storage.
By 2024, battery production will exceed US need for peaker plants by more than 4X.

With no additional fuel, water use or emissions, battery arrays are easier to permit and can be deployed quickly to meet expanding needs over time.


A cleaner, resilient grid.

Battery-based energy storage enables an expanded renewable energy future.

The US EIA forecasts 28,000 MW of new renewables in the next 10 years.
At the same time, 82,000 MW of power plants are expected to be retired.

Energy storage can serve as a replacement resource for aging power plants to absorb renewable energy. In fact, energy storage is doing this today.

The AES Laurel Mountain battery array is charged entirely from wind generation.

Laurel Mountain


associated emissions

The equivalent of taking


vehicles off the road

The AES US battery fleet is estimated to reduce emissions by 62,000 tons of CO2, 329 tons of SO2 and 97 tons of NOx per year.

Battery-based storage creates a resilient grid.

It is an always-on resource with no emissions or water use.

The AES US battery fleet enables the grid operator to absorb variable renewable energy giving the regional grid operator the ability to balance a full 104 MW of variation in less than 1 second.

A full


of variation in <1 second

Batteries are recyclable

Batteries last more than 20 years.

Grid batteries are centrally located, making for easier recycling at the end of their useful life.


Less than a peaking power plant.

Based on EIA data, the US utility industry will invest an estimated $75 billion in peakers in the next 25 years.

A portion of that planned investment can be applied to energy storage, with greater benefit.


Savings $1.5B

Utilization 97%

Choose & Save

Estimate avoided costs:


Savings $0

Utilization 6%

The bottom line:
Energy storage costs less than a peaker power plant and does more.

The switch to storage has already begun.

AES' battery arrays in OH and WV have already delivered $20 million of benefit to utilities and their customers vs. approaches using power plants.

Elkins, West Virginia – AES Laurel Mountain

Moraine, Ohio – Dayton Power & Light

$20M in savings

$200M expected over lifetime

Utilities and power markets around the world who choose storage are realizing the benefits.


1. US EIA data from AEO 2013.
2. Battery manufacturing information provided by Navigant Research.
3. PJM market benefits based on independent market monitoring reports and facility operating history.
4. Emissions benefits calculated using DOE/KEMA "Emissions II Study of Advanced Storage used in Frequency Regulation" methodologies.
5. Power plant cost from recent California peaker referenced by Power Magazine.