Millions of residential customers trust Constellation as their electricity and natural gas supplier in competitive energy markets. We work hard to earn your business with competitive rates, innovative plans, energy-efficient home solutions and best-in-class customer service.

For more than 25 years, we’ve provided customers with rewards and benefits, innovative energy supply choices, and an array of services and tools. We’re the country’s largest clean energy producer, serving over 2 million customers across 16 states and the District of Columbia.

We offer a variety of residential plans that provide flexibility, predictability, access to renewable energy and other features. Our energy management tools keep you informed to help you make smarter energy choices.