Constellation Review

Quick Facts

Is Constellation good? Constellation is the largest clean energy generator in the U.S. and one of a handful of Texas REPs that actually own power plants. Mid-tier pricing, simple plan structures, and strong financial backing—but no budget option and no specialty plans.

• Parent Company: Constellation Energy Corporation (NASDAQ: CEG)
• Years in Texas: 15 (entered via StarTex Power acquisition in 2011)
• Best For: Customers who want a financially stable provider with real generating assets and simple fixed-rate plans
• Avoid If: You want the cheapest rate or need prepaid/no-credit-check options
• Deposit Required: Conditional (soft credit check; letter of credit accepted as alternative)

Company Overview

Constellation is the largest producer of carbon-free electricity in America. They own and operate 21 nuclear reactors across 12 sites, plus wind farms, solar installations, and—after completing the $16.4 billion Calpine acquisition in January 2026—a massive natural gas and geothermal fleet. Total generating capacity: roughly 55,000 megawatts, enough to power 27 million homes.

Most Texas electricity companies are middlemen. They buy wholesale power and sell it retail. Constellation generates electricity. When they sell you a plan, there are actual power plants behind it. That distinction matters less for your monthly bill than it does for the company’s financial stability—Constellation isn’t going to fold during a price spike because they own the supply.

Constellation Energy (NASDAQ: CEG) has a market cap north of $100 billion. They’re a Fortune 500 company led by CEO Joseph Dominguez, headquartered at 1310 Point Street in Baltimore. They entered the Texas residential market in 2011 by acquiring StarTex Power, a Houston-based REP with 170,000 customers. The StarTex brand was retired in 2018, and those customers transitioned to Constellation.

Before Constellation was a standalone company, it was the generation arm of Exelon. The two split in February 2022, with Constellation taking the power plants and retail business while Exelon kept the utility operations. Since the spinoff, Constellation’s stock has surged—driven partly by AI data center demand for carbon-free power and deals like the 20-year Meta nuclear energy agreement in Illinois.

In Texas, Constellation is a mid-tier provider. Not the cheapest, not the most expensive. Their rates at 1,000 kWh currently range from 12.7 to 14.4 cents per kWh depending on the plan—competitive with established names like TXU and Reliant, but above budget providers like Frontier or Gexa.

Where Constellation Operates

Constellation serves all four major deregulated utility territories in Texas:

• Oncor — Dallas, Fort Worth, Arlington, Irving, Plano, Lubbock, Midland, Odessa, Waco
• CenterPoint — Houston, Sugar Land, Pearland, The Woodlands
• AEP Texas — Corpus Christi and surrounding areas
• TNMP — Galveston, Texas City, and select Central Texas communities

Austin and San Antonio run municipal utilities. Constellation can’t sell there.

Plan Types Offered

Constellation keeps its Texas residential lineup simple—four plans as of April 2026, all fixed-rate. No free nights. No variable rates. No tiered complexity.

Usage Bill Credit Plans (12 and 24 Month) The workhorse plans. You get a fixed rate plus bill credits when your usage hits certain thresholds—typically $35 at 1,000 kWh and $50 at 2,000 kWh. These plans work well for average-to-high usage households. The math flips against you below 500 kWh, where effective rates climb to 16-17 cents per kWh.

• 12-month term: ~12.7 cents/kWh at 1,000 kWh
• 24-month term: ~13.9 cents/kWh at 1,000 kWh (rate lock premium for the extra year)

No Minimum Usage Fee Plan (12 Month) A straightforward fixed rate with no usage thresholds to hit. Higher base rate (~14.9 cents/kWh at 1,000 kWh) but no penalty for low-usage months. Better for apartments, snowbirds, or anyone whose usage swings a lot month to month.

GREEN Plan (12 Month) 100% renewable energy backed by wind and/or solar Renewable Energy Certificates (RECs) from U.S. generators. Priced at a premium (~16 cents/kWh at 1,000 kWh). Worth noting: Constellation’s standard plans already include roughly 30% renewable content, so the GREEN plan is paying for the last 70%.

All plans carry a $150 early termination fee, waived if you’re moving outside the service area. Constellation will also reimburse up to $150 of your current provider’s ETF when you switch—a nice touch that offsets the switching cost.

The Clean Energy Story: What’s Real

Constellation’s clean energy pitch is more credible than most, but the Texas residential reality is more nuanced than the corporate marketing suggests.

What’s true: Constellation Energy Corporation generates more carbon-free electricity than any American company. Their nuclear fleet runs at 94.7% capacity, producing zero-carbon power around the clock. They own wind farms and solar installations. After acquiring Calpine, they added geothermal plants too. This is a company with real generating infrastructure, not a marketing operation buying paper credits.

What’s also true: Your Texas residential plan doesn’t come directly from a Constellation nuclear plant. The Texas grid (ERCOT) pools all generation. What Constellation’s GREEN plan actually does is purchase RECs—certificates proving that renewable energy was generated somewhere in the U.S. and matched to your usage. This is the same mechanism Green Mountain, TXU, and every other “green” provider uses in Texas.

The honest difference: Constellation’s RECs are more credible because the company actually generates much of the clean energy behind them. They’re not a middleman buying certificates from someone else’s wind farm—in many cases, they own the wind farm. That doesn’t change the electrons hitting your meter, but it does mean your premium supports real clean energy infrastructure rather than just shuffling paper.

Nuclear power is Constellation’s backbone. It runs 24/7, doesn’t depend on weather, and produces zero carbon emissions. The trade-offs—nuclear waste, decommissioning costs, and however small the meltdown risk—are real. If you only want wind and solar, the GREEN plan covers that. But Constellation’s broader carbon-free story leans heavily on nuclear, and they’re transparent about it.

Deposit Requirements

Constellation runs a soft credit inquiry during signup—it won’t affect your credit score, and creditors won’t see it. Based on that check, you either enroll with no deposit or get asked for one (up to $150 for residential customers).

If you’re asked for a deposit, you have options:

• Letter of credit: Contact your previous electric provider, get a letter showing your payment history, and fax it to Constellation at 866-477-8576. This can replace the deposit entirely.
• Seniors and domestic violence survivors may qualify for deposit exemptions under PUCT rules.

Constellation does not offer prepaid plans. If your credit situation makes a deposit unworkable, you’ll need to look at providers like Payless Power or Reliant’s Flex Pay option first.

Customer Service: The Real Story

Constellation built its reputation serving commercial and industrial customers—power-hungry data centers, manufacturing plants, government agencies. Residential is a growing part of the business, but it’s not where they started.

Contact details:

• Phone: 888-900-7052 (Monday-Friday 7am-8pm CST, Saturday 8am-5pm CST)
• Live chat: Monday-Friday 7am-7pm CST
• Social media: Facebook and Twitter monitored 9am-4pm CST weekdays

Worth knowing:

• Plan structures are simple and transparent. No bill credits requiring exactly 1,000 kWh. No tiered pricing where you have to game your usage.
• Weekly usage emails with bill estimates help you track spending before the bill arrives.
• A/C protection bundles are available in Houston, Dallas, and Lubbock—electricity plus HVAC coverage in one plan.
• Fortune 500 financial stability. No risk of this company disappearing or cutting corners.

The catch:

• Customer service scores are decent but not exceptional. Billing clarity scores around 72/100 and customer service around 74/100 on third-party review sites.
• Some customers report frustrations with the identity verification process during enrollment—particularly around name ordering on Texas driver’s licenses.
• Baltimore headquarters means limited Texas-specific local investment compared to homegrown providers.
• No specialty plans. If you want free nights, time-of-use, solar buyback, or EV-specific pricing structures, Constellation doesn’t offer them in Texas residential (yet).

Complaint Statistics

PUCT data shows Constellation with 57 complaints over the most recent 12-month period—about 0.50 complaints per 10,000 customers. The industry average is 1.20 per 10,000. That’s less than half the typical rate, which is genuinely good.

Breakdown: 23 billing complaints, 17 slamming/cramming complaints, zero service quality complaints. The billing complaint volume is normal for a provider their size. The slamming/cramming number warrants attention—those complaints involve unauthorized enrollment or plan changes—but in context, 17 across the full customer base is a low count.

Third-party review aggregators show a 4.9/5.0 star rating across 1,100+ verified reviews, with a Net Promoter Score of 88. That’s strong. About 74% of customers have stayed with Constellation for two or more years.

Bottom Line

Constellation is a mid-tier Texas electricity provider backed by the largest clean energy generator in America. You won’t find the cheapest rates here, but you’ll find straightforward plans, low complaint rates, and genuine generating assets behind the brand. Their bill credit plans work well for households using 1,000+ kWh per month. Below that, the math gets worse.

Pick Constellation if financial stability and clean energy credentials matter to you and you’re fine paying a few dollars more per month than budget providers. Skip them if you want the lowest price, need prepaid, or prefer specialty plan structures like free nights.