Constellation vs Green Mountain Energy: Texas Electricity Head-to-Head
Constellation offers 24 plans starting at 10.9c/kWh while Green Mountain Energy has 31 plans from 13.9c/kWh across all 6 Texas TDU service areas. Here is how their rates, terms, renewable options, and fees compare.
Rate Curve Comparison
Lowest average rate across all usage levels (11.0c/kWh vs 14.0c/kWh). Consistent pricing regardless of how much electricity you use.
Shows the best available all-in rate from each provider at 500, 1,000, and 2,000 kWh usage levels. The best plan may differ at each tier.
Best Plan Per Term Length
| Term | Constellation Best Plan | Rate | Fee | Green Mountain Energy Best Plan | Rate | Fee | Winner |
|---|---|---|---|---|---|---|---|
| 6 Month | Simple Switch 3EFL | 10.9c | $50 flat | N/A | N/A | N/A | Constellation |
| 12 Month | 12 Month Usage Bill Credit EFL | 11.3c | $150 flat | Pollution Free e-Plus 9 ChoiceEFL | 13.9c | $95 flat | Constellation |
| 24 Month | 14 Month Usage Bill CreditEFL | 11.8c | $150 flat | Pollution Free e-Plus 24 ChoiceEFL | 14.2c | $295 flat | Constellation |
| 36 Month | 36 Month Usage Bill CreditEFL | 13.3c | $150 flat | Pollution Free e-Plus 36 ChoiceEFL | 14.3c | $395 flat | Constellation |
Plan Type Breakdown
Constellation
Green Mountain Energy
Cancellation Fee Comparison
Constellation
Green Mountain Energy
Renewable Energy Deep Dive
Constellation
Green Mountain Energy
Full Plan Tables
Which Provider Fits You Better?
Looking for the Lowest Rate?
Better fit: Constellation
Constellation has the lower advertised rate at 10.9c/kWh (1,000 kWh usage), compared to 13.9c/kWh.
Want a Long-Term Price Lock?
Better fit: Constellation
Constellation has the better option for locking in a rate on a 24-month or longer contract.
Going Green?
Better fit: Green Mountain Energy
Green Mountain Energy offers more 100% renewable plans (25 vs 1).
Need Flexibility?
Better fit: Constellation
Constellation has more flexible cancellation terms, including short-term or lower-commitment plans.
These rates are based on 1,000 kWh average usage. Your actual savings depend on YOUR usage pattern.
WattTrim analyzes your real Smart Meter data to find the plan that saves you the most - across all providers, not just these two.
Always Free
Trim My BillFrequently Asked Questions
Is Constellation cheaper than Green Mountain Energy?
Based on current plan data, Constellation has the lower advertised rate, offering plans starting at 10.9c/kWh compared to 13.9c/kWh from the other provider at 1,000 kWh of usage. Your actual cost depends on your usage pattern and the specific plan you choose.
Does Constellation offer renewable energy plans compared to Green Mountain Energy?
Constellation offers 1 plan (4% of its lineup) at 100% renewable energy, while Green Mountain Energy offers 25 plans (81% of its lineup).
What are the cancellation fees for Constellation vs Green Mountain Energy?
Constellation charges $50 - $150 on its tracked plans, while Green Mountain Energy charges $95 - $395 (mixed fee types) on its tracked plans. Always review the Electricity Facts Label (EFL) for the exact fee structure before enrolling.
Which provider has more plan options in Texas, Constellation or Green Mountain Energy?
Green Mountain Energy currently offers more plan options across the Texas TDU areas we track, with 31 plans compared to 24.
Can I switch from Constellation to Green Mountain Energy?
Yes. Texas is a deregulated electricity market, so you can switch retail electric providers at any time. If you are still under contract with your current provider, check for an early termination fee before switching. New service with either provider typically starts within 1 to 5 business days of enrollment.