Every major Texas electric company now offers a “green” or “100% renewable” plan. That sounds great until you realize what “100% renewable” means in most cases: the company bought paper certificates to offset your fossil fuel usage. The same coal and gas power still flows to your house.
This isn’t necessarily a scam. But there’s a wide spectrum between genuine renewable energy investment and slapping a green label on an otherwise standard plan. Understanding where your company’s green energy plans fall on that spectrum matters if you care about your environmental impact.
How “Green” Electricity Works in Texas
You can’t choose which electrons reach your home. Electricity from wind farms, natural gas plants, coal plants, and solar farms all flows into the same grid. When you flip a light switch, the power came from whatever mix of sources was generating at that moment.
So what does a “green” plan do?
Renewable Energy Certificates (RECs)
Most green plans work through Renewable Energy Certificates. Here’s the process:
- A wind farm in West Texas generates 1 megawatt-hour of electricity
- That electricity goes into the ERCOT grid
- The wind farm also receives one REC—a certificate proving 1 MWh of renewable electricity was generated
- Your electric company buys that REC
- The company credits the REC to your account
- Your plan is now “100% renewable”
Nothing about the power on your wires changes. Across the whole ERCOT grid, 2025 energy came from 41.1% natural gas, 23.6% wind, 13.9% solar, 12.9% coal and 8.6% nuclear (ERCOT fact sheet, September 2026). That is a grid-wide annual figure, not a measurement of any one house. What the REC does is mathematical: enough renewable electricity was generated somewhere in Texas to “match” your usage.
The REC Market
RECs trade on an open market. Prices fluctuate based on supply and demand, but in Texas—where wind and solar are abundant—RECs are cheap. A company can buy enough RECs to label a plan “100% renewable” for less than a penny per kWh.
This means the green premium you pay (typically 0.5-2 cents per kWh) mostly covers the REC cost plus margin for the company. Some of that money flows back to renewable energy generators, but it’s not the same as directly building new wind turbines or solar panels.
What “100% Renewable” Legally Means in Texas
The label clears a low bar. The Public Utility Commission requires only that an Electricity Facts Label “include the percentage of renewable energy of the electricity product and the percentage of renewable energy of the statewide average generation mix” (16 TAC 25.475(g)(5)). Percentages. Nothing about which facility, which year it was built, or which state it sits in.
The same rules decide how that percentage gets proven. For power generated in Texas, “the retirement of RECs shall be the only method of authenticating generation for which a REC has been issued,” and one retired REC counts as one megawatt-hour (16 TAC 25.476(f)(3)). A supply contract naming a specific plant authenticates fuel mix only for power bought outside Texas, and then the contract “must identify a specific generating facility” (16 TAC 25.476(f)(2)). ERCOT administers the credit trading program the PUCT set up, and every competitive retailer approved to do business in Texas is required by law to register in it and retire RECs annually.
So a REC-backed plan is not a company sneaking past the rules. RECs are the rules. What separates one green plan from the next is which RECs, generated where, from projects how old, and whether the company will tell you any of it.
The Greenwashing Spectrum
A “100% renewable” label from one company might mean a paper purchase costing a fraction of a cent per kWh; from another, it funds a brand-new solar farm. Four levels separate genuine green investment from marketing theater.
Level 1: REC-Only Plans (Most Common)
The company buys RECs on the open market to offset your usage. The RECs might come from wind farms that were built 10 years ago and would exist with or without your plan.
What it means: Your money supports existing renewable infrastructure, marginally. It doesn’t create new renewable capacity.
Who does this: Most major companies’ basic green plans, including some offerings from Gexa Energy and Reliant Energy.
Level 2: New Renewable Matching
The company commits to matching your usage with RECs from newly built renewable projects (built within the last 2-3 years). This means your subscription helps justify the financial case for building new capacity.
What it means: Your money has a stronger connection to new renewable development.
Who does this: Chariot Energy buys solar output under long-term agreements with Texas solar farms developed by its parent company, 174 Power Global. Rhythm Energy sources from 100% renewable projects.
Level 3: Direct Ownership and Investment
The company contracts with specific renewable facilities and names them. RECs still do the legal work, because in Texas they have to, but they arrive bundled with output from a plant you can look up instead of from an anonymous pool.
What it means: Maximum transparency. You can point at the thing your money helped run.
Who does this: Almost nobody, and the Electricity Facts Label is where you find out. Chariot Energy names its facility: 30 MW of the 180 MW Oberon solar farm near Odessa, bought under a long-term agreement. Green Mountain Energy has the longest green track record in Texas, but on mechanism its residential plans sit at Level 1. Its own EFL says so: “Green Mountain will purchase and retire renewable energy certificates (RECs) representing the environmental attributes associated with renewable energy generation for 100% of your paid usage. You will not have electricity from a specific generation facility delivered directly to your service address.” The renewable content line on that same label reads “at least 51% Texas Wind, and up to 49% Wind from U.S facilities outside Texas.” No facility is named anywhere on it.
Level 4: Local/Community Solar
Some companies offer plans connected to specific local solar installations. Your subscription directly funds panels in your area, and you receive credits for the electricity they generate.
What it means: The most direct impact—you can sometimes visit the solar farm that’s generating “your” electricity.
Who does this: Almost nobody in the Texas retail market yet. Chariot Energy does not sell community solar; its supply is tied to its parent company’s Texas solar farms, and it offers solar buyback plans for homes with rooftop panels.
How to Evaluate a Green Plan
Four questions separate a worthwhile green plan from an overpriced sticker.
Question 1: Where Do the RECs Come From?
Ask the company (or check the EFL) whether RECs come from:
- National market: Cheapest RECs, least impact. Could be from a decade-old wind farm in Iowa.
- Texas market: Better. Supports the state’s renewable infrastructure.
- Specific facilities: Best. The company can name the wind or solar farm.
The EFL often answers this without you having to ask. Green Mountain’s Pollution Free label states its renewable content is “at least 51% Texas Wind, and up to 49% Wind from U.S facilities outside Texas.” That is half a Texas answer and half a national one, printed on the document the state already requires the company to hand you.
Question 2: Are the RECs from New Projects?
RECs from existing projects that would run regardless don’t create new renewable capacity. RECs from projects built in the last 2-3 years (“new vintage”) mean your subscription contributed to the financial case for building them.
Question 3: What’s the Actual Green Premium?
Compare the green plan’s rate to the company’s equivalent non-green plan. If the difference is 0.5 cents per kWh, the company is spending very little on RECs. If it’s 2+ cents per kWh, they’re either buying higher-quality RECs or pocketing a larger margin.
At 1,000 kWh monthly usage:
- 0.5-cent premium = $5/month ($60/year)
- 1-cent premium = $10/month ($120/year)
- 2-cent premium = $20/month ($240/year)
Question 4: Does the Company Walk the Talk?
Look beyond the plan:
- Do they invest in renewable infrastructure?
- Do they have carbon neutrality goals for their own operations?
- Are they transparent about their energy sourcing?
- Do they publish annual sustainability reports?
Green Mountain Energy has been exclusively renewable since 1997 and hires an independent auditor every year that, in the company’s words, “tracks all of our REC purchases through the chain of ownership back to the renewable energy project owner” and confirms the RECs were retired so nobody else can claim them. Its published sustainability reports are an archive, not a current series; the posted ones run through 2008/2009. Compare that record to a company that sells mostly fossil-fuel plans and tacks on a “green option” for marketing purposes.
The Major Green Companies in Texas
Three companies come up most often when Texans shop green. Only one of them names the facility behind the power.
Green Mountain Energy
The original green electricity company in Texas. Founded in 1997, they’ve sold exclusively renewable energy from day one.
Strengths: Long track record, 100% renewable by default (not an add-on), an annual third-party audit of every REC purchase and retirement, and a history of customer demand helping bring new wind and solar facilities online.
How the supply is backed: RECs, and the company puts it in writing. The Electricity Facts Label for its Pollution Free plans reads: “Green Mountain will purchase and retire renewable energy certificates (RECs) representing the environmental attributes associated with renewable energy generation for 100% of your paid usage. You will not have electricity from a specific generation facility delivered directly to your service address.” Renewable content on that label is “at least 51% Texas Wind, and up to 49% Wind from U.S facilities outside Texas.” Worth knowing: Green Mountain’s Green-e certified electricity and REC products go to its Texas commercial customers, not its residential plans.
Trade-off: Rates tend to be 1-3 cents higher than the cheapest non-green plans. You’re paying for a company that has never sold anything but renewable electricity, not for power traced to a named wind farm.
See how they compare: Green Mountain vs Reliant | Green Mountain vs Rhythm
Chariot Energy
A solar-focused electric company whose parent, 174 Power Global, develops utility-scale solar farms in Texas. Chariot buys output from those projects under long-term agreements, including 30 MW of the 180 MW Oberon solar farm near Odessa.
Strengths: Supply tied to its parent company’s Texas solar farms, solar buyback plans for rooftop-solar homes, straightforward fixed-rate and time-of-use options.
Trade-off: Smaller company with less brand recognition. Serves the ERCOT competitive market.
See how they compare: Chariot vs Gexa
Rhythm Energy
Offers 100% renewable plans sourced from Texas wind and solar. Known for transparent, no-gimmick pricing.
Strengths: Renewable by default, straightforward pricing with no usage tiers or bill credits to qualify for, and rates that stay competitive with non-green plans.
Trade-off: As a newer market entrant, they have a shorter track record than Green Mountain or the legacy companies.
See how they compare: Green Mountain vs Rhythm | Reliant vs Rhythm
The Cost of Going Green
How Much More Does Green Electricity Cost?
The green premium has largely collapsed. Renewables are now the most cost-competitive form of new-build generation on an unsubsidized basis (Lazard, 2026 LCOE+ report). That means green plans are sometimes competitive with—or even cheaper than—fossil-fuel plans.
Typical green premium: 0-2 cents per kWh above the cheapest available non-green plan At 1,000 kWh/month: $0-20 extra per month
Some companies, Rhythm Energy for one, offer 100% renewable plans at rates comparable to standard plans because Texas RECs cost so little.
Is the Premium Worth It?
That depends on what you’re buying. If the green premium goes toward:
- New renewable capacity: Yes, you’re funding the energy transition
- Old RECs from existing projects: Maybe. You’re supporting the REC market but not building new capacity
- Marketing margin: No. You’re paying for a label, not impact
Ask the company directly what the premium funds.
Red Flags: How to Spot Greenwashing
One quick test: ask where the RECs come from, what year the generation happened, and whether any facility is named. Most companies will not name a facility, and under Texas rules they do not have to. Vague answers to all three questions are the tell.
”100% Clean Energy” with No Details
If a company claims 100% renewable but can’t tell you where the RECs come from, what vintage they are, or which facilities generated the equivalent electricity, they’re probably buying the cheapest available RECs and calling it green.
Green Plan Costs the Same as Standard
If the green plan costs exactly the same as the non-green plan, the company is either eating the REC cost (unlikely) or the RECs are so cheap as to be meaningless (more likely).
Vague Environmental Claims
Watch for language like “committed to a cleaner future” or “supporting renewable energy” without specifics. Real green companies cite exact percentages, the resource type and where it was generated, and measurable goals. The rare one that can name a facility will.
Carbon Offset Claims Instead of RECs
Some companies claim “carbon neutral” plans through carbon offsets rather than RECs. Carbon offsets (like paying to plant trees) don’t guarantee any renewable electricity was generated to match your usage. They’re a different mechanism entirely and can be of questionable quality.
Texas’s Renewable Reality
Texas builds more wind and solar than any other state, and that changes the math on what a green plan is worth here. ERCOT’s September 2026 fact sheet counts:
- Wind: 41,208 MW of installed capacity, which ERCOT calls the most of any state in the nation
- Solar: 41,719 MW of utility-scale installed capacity
- Grid mix: wind supplied 23.6% of ERCOT’s 2025 energy and solar 13.9%
This means two things for green electricity buyers:
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RECs are cheap because Texas produces a surplus of renewable energy. The financial case for buying cheap RECs is weaker here than in states with less renewable capacity.
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The grid you’re already on is partly renewable. Wind and solar together supplied 37.5% of ERCOT’s 2025 energy, standard plan or not. A “100% renewable” plan uses RECs to cover the rest.
The Bottom Line
If you want green electricity in Texas, you have real options—not just greenwashed labels. The key is knowing what you’re buying.
Genuine green: Companies like Green Mountain Energy, which has sold only renewable electricity since 1997 and has its REC purchases audited every year, and Chariot Energy, whose supply is tied to its parent company’s Texas solar farms and which names one of them. Green Mountain’s label puts its residential supply at retired RECs, at least 51% Texas wind, no facility named. Read that as a real commitment to the category rather than a traceable line from one turbine to your meter.
Good enough green: Companies that buy Texas-sourced, new-vintage RECs. Your money supports the state’s renewable market even if it doesn’t fund specific projects.
Green label only: Companies that buy the cheapest available RECs from anywhere, slap a green badge on the plan, and charge you 1-2 cents extra for the privilege.
Ask questions. Check the EFL. Look for transparency. The greenest plan isn’t always the one with the biggest marketing budget.
For a full comparison of green companies, check our best green energy companies ranking. Ready to compare green plans at your address? Visit ComparePower.
Frequently Asked Questions
Does green electricity come from renewable sources?
Not directly. All electricity on the Texas grid comes from a mix of sources (natural gas, wind, solar, coal, nuclear). When you buy a green plan, your electric company purchases Renewable Energy Certificates (RECs) to match your usage with an equivalent amount of renewable generation somewhere on the grid. You get the same physical electricity as everyone else. Texas rules are blunt about it: for generation inside the state, retiring RECs is the only way a company can authenticate the renewable content it prints on an EFL.
How much more do green electricity plans cost in Texas?
Green plans typically cost 0-2 cents more per kWh than standard plans. For a household using 1,000 kWh per month, that’s $0-20 extra. Because Texas has abundant wind and solar, the green premium is smaller here than in most states. Some green companies offer rates competitive with standard fossil-fuel plans.
What are Renewable Energy Certificates (RECs)?
A REC is a certificate proving that 1 megawatt-hour of electricity was generated from a renewable source. When a wind or solar farm generates power, it produces both electricity (which goes to the grid) and RECs (which can be sold separately). Electric companies buy RECs to label plans as “renewable” or “green.” Texas is stricter than the generic definition: PUCT rules define a REC as “one MWh of renewable energy that is physically metered and verified in Texas” (16 TAC 25.173), and ERCOT administers the trading program that issues and retires them.
Which Texas electricity company is the greenest?
Green Mountain Energy has the longest track record (since 1997) of selling exclusively renewable electricity, and its Electricity Facts Label spells out the mechanism: it purchases and retires RECs covering 100% of your paid usage, with renewable content of “at least 51% Texas Wind, and up to 49% Wind from U.S facilities outside Texas.” Chariot Energy’s supply is tied to solar farms developed by its parent company, 174 Power Global, including 30 MW of the Oberon project near Odessa. Rhythm Energy sources from 100% renewable projects. The “greenest” depends on whether you value track record, Texas-sourced credits, or a named local project.