Green Mountain Energy

Green Mountain Energy started selling lights in Texas in 1997, making them the oldest 100% renewable light company in America. That’s not marketing language - they have been sourcing power exclusively from wind and solar since before most Texans knew what deregulation was. NRG Energy, the same major company behind Direct Energy and other Texas brands, now owns them. That corporate backing means stable operations and a company that isn’t going anywhere.

They hold PUCT license #10009, one of the earliest license numbers issued in the Texas deregulated market.

100% Renewable. What That Actually Means

When you sign up with Green Mountain Energy, every unit of power on your plan is matched by renewable energy certificates tied to wind and solar generation in the Texas grid. The physical electrons flowing into your home are the same ones everyone else gets - that’s how the grid works. The difference is that Green Mountain purchases and retires Renewable Energy Certificates equal to your usage, which funds wind and solar generation instead of natural gas plants.

If keeping your lights green matters to your household, Green Mountain is the most straightforward way to do it in Texas. You’re not paying extra for a “green add-on” - it’s the whole product.

Credit Check and Deposit Reality

Green Mountain Energy runs a credit check on every traditional plan application. This isn’t unique to them - every Texas light company that offers post-paid plans does the same thing. The system is built to screen for payment risk, not to help you get your lights on.

If your credit history shows missed payments or past utility debt, Green Mountain will likely require a deposit before activating service. What they quote you depends on your specific history. There’s no published deposit schedule. Some people hear $0 and some hear $200 or more.

If Green Mountain asks for a deposit you can’t cover right now, that deposit isn’t the final word. We check 5-6 other traditional light companies at the same time, because every company sets its own thresholds and those thresholds shift based on their business needs. Many people find a $0 deposit option through this process. If none of the traditional options work out, pay-as-you-go is always available with no credit check and no deposit. Read how deposits work and what to do about them.

Pricing: Good Plans, Not Cheap Plans

This is where you need straight information. Green Mountain Energy rates run 10 to 25% higher than budget Texas light companies. That premium funds their renewable sourcing and the NRG corporate structure that supports the brand.

On a home using 1,000 units per month, that pricing gap can mean an extra $100 to $250 per year compared to lower-cost light companies in the same area. If cost is the primary factor in your decision, Green Mountain is probably not the right fit. You can find lights that cost less.

If renewable energy is a priority and your budget has room for the premium, the trade-off is honest. They’ve been doing this longer than anyone else and the product is straightforward.

For a side-by-side view of what other Texas light companies cost, see our best no-deposit light companies guide.

Same-Day Lights

Green Mountain Energy offers same-day service if you enroll before 5 PM Central Time on a weekday. Smart meters in CenterPoint (Houston) and Oncor (Dallas-Fort Worth) territories process quickly. After 5 PM on weekdays or on weekends, your lights typically come on the next business day.

If you need power today and it’s before 5 PM Monday through Friday, they can get you there. After that window, you’ll need to either wait or look at a pay-as-you-go option that runs later. How pay-as-you-go works covers the prepaid alternative if same-day timing is critical for you.

Who Green Mountain Works For

Green Mountain Energy is a solid choice if you have decent credit, want a well-established company with NRG backing, and care about keeping your light bill tied to renewable energy. The brand is legitimate, the operations are stable, and the renewable commitment is the real deal.

It’s not the right call if you’re looking for the lowest rate available, if you’re working with very tight credit, or if a deposit is already on the table and you need to avoid it entirely. The premium pricing and standard credit check process mean it won’t solve a tight-budget situation.

Try for a Traditional Plan First

If you’re unsure whether you’d qualify for a $0 deposit traditional plan, it’s worth checking before deciding Green Mountain or any other company is out of reach. We run your situation through multiple light companies at once to see who approves you at $0 deposit. That takes a few minutes and costs nothing.

If the check works out, you get a traditional plan at a rate that saves you real money versus pay-as-you-go. If it doesn’t, pay-as-you-go is always the fallback. No credit check, no deposit, lights on the same day. See prepaid vs traditional for what the cost difference actually looks like, or read our path to traditional plans guide if you want to understand how to work toward lower rates over time.

Read our full Green Mountain Energy review for plan details, rate tables, and how they compare against other Texas light companies.