Electricity supplier • 5 states
Green Mountain Energy plans, rates & reviews
Green Mountain Energy is a subsidiary of NRG and an electricity supplier serving residential customers in 5 states. This is an independent comparison, not Green Mountain Energy's official site.
Affiliate disclosure: We may earn a commission if you sign up through our links. Learn more
Updated June 2026 • PA PUC License: A-2011-2229050
Green Mountain Energy at a glance
A-2011-2229050
PA PUC License
NRG
Parent company
Electric Generator Supplier
Service type
About Green Mountain Energy
Green Mountain Energy is a licensed electricity supplier serving residential and commercial customers in PA, TX, NY, NJ, MD. The company operates as part of NRG.
In deregulated markets, Green Mountain Energy competes with other suppliers to provide the generation portion of your electricity bill. Your local utility continues to handle delivery, maintenance, and outage response regardless of which supplier you choose.
Visit greenmountainenergy.com to learn more about their current plans and offers.
Plan types Green Mountain Energy offers in Pennsylvania
Most PA residential electricity suppliers offer these common plan structures:
Fixed-rate plans
Locked rate for a set term (typically 6, 12, or 24 months). Protects against rate increases but may include early termination fees.
Variable-rate plans
Rate changes month-to-month based on market conditions. No contract lock-in, but rates can increase unexpectedly.
Green energy plans
100% renewable energy credits (RECs) offset your usage. Rates may be slightly higher than standard plans.
Blended plans
Mix of renewable and standard generation. Often 25%, 50%, or 75% renewable at intermediate price points.
Green Mountain Energy's specific current offers and rates are not displayed here. Visit their website or use our ZIP submit to see current PA plans.
Service area in Pennsylvania
Green Mountain Energy serves customers in the following PA utility territories:
This covers most of Pennsylvania's population. Enter your ZIP code to confirm service availability at your specific address.
How Green Mountain Energy compares to other PA suppliers
Pennsylvania has 100+ PUC-licensed residential suppliers. Here's how Green Mountain Energy fits in the landscape:
How to enroll with Green Mountain Energy
Compare rates
Visit greenmountainenergy.com or use our ZIP submit to see what plans are currently offered for your area.
Check your Price to Compare
Compare Green Mountain Energy's rate against your utility's default service rate. This is listed on your bill as "Price to Compare."
Enroll directly
Sign up with Green Mountain Energy. Your distribution utility continues delivery. Billing arrangements vary by supplier.
Green Mountain Energy also enrolls customers through PA Power Switch and licensed brokers.
Frequently asked questions
- Is Green Mountain Energy a licensed PA electricity supplier?
- Yes. Green Mountain Energy is licensed by the Pennsylvania Public Utility Commission under license number A-2011-2229050.
- Where does Green Mountain Energy operate?
- Green Mountain Energy serves customers in PA, TX, NY, NJ, MD.
- Will my utility change if I sign up with Green Mountain Energy?
- No. Your distribution utility continues to deliver your electricity. Green Mountain Energy supplies the generation portion only. You'll see both charges on your utility bill.
- How can I cancel my Green Mountain Energy contract?
- Contract terms vary by plan. Fixed-rate plans typically have early termination fees. Review your contract or contact Green Mountain Energy directly for cancellation procedures.
- Does Green Mountain Energy offer renewable energy plans?
- Most major suppliers offer some renewable energy plans. Visit greenmountainenergy.com for current options and pricing.
Related guides
Pennsylvania Price to Compare Explained
What the PTC is and how to use it when shopping
Fixed vs Variable Rate Plans
Which plan type makes sense for your household
How to Switch Suppliers in PA
Complete guide to switching providers in Pennsylvania
Green Energy Plans in PA
What 100% renewable plans really mean
Ready to see what Green Mountain Energy offers in your area?
Enter your ZIP code to see available plans and rates.
Free comparison • PUC-licensed suppliers • EIA-cited data