About Us > What We Do


of the Grid

Since 1997, ISO New England has been working to ensure the reliable flow of competitively-priced wholesale electricity that keeps New England’s homes, businesses, and public services up and running.


Our Three
Critical Roles

Overview of the ISO’s three main roles and responsibilities in New England.

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Operating the Power System

Keeping electricity supply and demand in balance 24/7.

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Administering Wholesale Electricity Markets

Designing, running, and overseeing the region’s wholesale electricity marketplace.

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Power System Planning

Ensuring that the power system meets New England’s needs over the next 10 years.

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A Highly Skilled Workforce

The ISO’s varied roles and responsibilities require a broad spectrum of professionals in a highly competitive industry.

Industry Standards, Structure, and Relationships

Rundown of the ISO’s regulatory environment and stakeholder connections.

How Electricity Flows

From wholesale to retail: the basics on how electricity gets to New England’s homes and businesses.

What is Reliability?

A dependable flow of electricity is priority number one for the ISO. What this means from both a practical and technical perspective.


Our History

Timeline of major milestones shows how the ISO has changed along with New England’s rapidly-evolving electricity industry.

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Key Grid and
Market Stats

Facts and statistics on New England’s electricity use, power supply mix, transmission development, air emissions, and prices. Includes our list of the top 10 demand days, plus state energy profiles.

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Electricity Use

Data related to the region’s changing demand for electricity.

Resource Mix

Data related to the fuels and technologies used to produce electricity in New England.


Data related to regional investment in improved electricity delivery.


Data related to New England’s suite of competitive wholesale electricity markets.


Today’s Grid

Major challenges affecting the performance of power system resources in the region, creating risk to the reliable supply of electricity for New England’s homes, businesses, and public services.

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In Depth

Articles and other resources that can help give you a better understanding of New England’s wholesale electricity industry.

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Grid Operations

Wind Power and Factors that Contribute to Its Curtailment

The rapid growth of wind power in the region is also adding new and complex challenges to managing the New England power grid.

Geomagnetic Disturbances

Learn how the ISO takes steps to help protect the power grid in the event of predicted geomagnetic disturbances caused by solar events.


Forecasting Demand (Electricity Use)

Super Bowl Sunday and Its Effect on the Power Grid

Read about how the ISO creates forecasts of New England’s electricity needs.

Beating the Heat: How the ISO Prepares for Summer Peak Demand

Learn how temperature and other factors affect the grid—and the actions the ISO takes when electricity demand is outpacing supply.


Administering Wholesale Electricity Markets

Wholesale vs. Retail Electricity Costs

Get the basics on how wholesale prices affect retail rates, and how you can spot these in your retail electricity bill.



Power System Planning

Much Has Changed Since the 2003 Northeast Blackout

Read about the most widespread outage in our nation’s history and what’s been done to prevent a repeat.



The Evolving Grid

Working toward a Smarter Grid

ISO New England is actively pursuing innovations to help create a more efficient, responsive, reliable system that can handle expanded renewable generation, demand resources, and smart grid technology.

Growth in Solar Energy Means Changes for Power Grid Planning, Operations

Solar energy has become one of the fastest growing types of electricity generation in New England.