P.J. Popovic, CEO of Houston-based Rhythm, explains Renewable Energy Certificates work and their impact on Texas. Photo courtesy of Rhythm

We all know what renewable energy is — wind, solar, biomass, geothermal, hydropower — but how do you purchase it? It's invisible. Not to mention when energy from any source enters the electricity grid, there's no way to track all those electrons.

Renewable Energy Certificates have made it possible

Renewable Energy Certificates, or RECs, allow us to track your clean energy. Each individual REC represents one megawatt-hour of clean energy generated. And while a REC isn't technically electricity, it represents the clean energy going into the electricity grid—meaning homes and businesses claim their commitment to renewable energy if their electricity is supported by RECs.

It's also important to understand what a renewable energy certificate is not: an offset. An offset represents a metric ton of emissions avoided and a REC represents 1 MWh of clean energy generated. While each have similar goals, they are not quite the same thing.

Not all RECs are created equally

The market for RECs is fluid. Due to the growth of the renewable energy market, RECs have been oversupplied for years. This has created low prices and little-to-no financial advantage for the facilities that generate clean electricity (e.g., wind facilities, solar farms, hydro plants).

In Texas, the retail electricity market is inundated with renewable electricity claims said to be supported by RECs. The energy plan you sign up for might come from solar, wind, biomass, or even trash incineration, but the renewable energy facilities likely are coming from outside Texas, located in places like California, Canada, or elsewhere. While there's no wrong way to switch to renewable energy, supporting renewable energy sources inside Texas helps Texans move closer to being a more sustainable state.

Choosing Texas renewable energy plans and your actions do have a true, real-world impact more than ever before

Some critics have argued that REC-supported renewable energy plans don't meet the highest standard of sustainability arguing RECs are not foundational to the existence of renewable energy assets. In other words, they argue that RECs don't provide a material revenue source for renewable projects because they don't incentivize new developments of renewable facilities to be built.

When RECs were trading for less than a dollar, this was a valid argument. But that was then, and this is now.

In the last year alone, voluntary renewable energy certificate prices have skyrocketed and are now between $7 and $10 per MWh. This means RECs can now contribute up to 30 percent of a renewable facility's revenue. Naturally, this encourages more and more clean-energy facilities and clean-energy jobs to be created. A win-win.

What about Power Purchase Agreements?

A Power Purchase Agreement, or PPA, is a tad different than a REC. In a PPA, the developer of a renewable project (solar arrays at a solar farm, or turbines at a wind farm) can sell the actual energy it produces over a 10-to-20-year contract.

While the sale of this renewable energy still contributes to a larger portion of project revenues, the revenue mix has clearly shifted, and RECs cannot be considered an immaterial incentive anymore. Sure, PPAs are a stronger market signal for renewable project development, but only a couple of hundred organizations globally utilize PPAs. This makes them very challenging for businesses to access.

Through PPAs, various risks, credit needs, and long-term commitments create challenges for many organizations to meet their sustainability goals. So, while RECs do not provide as material of a market signal as PPAs, with the recent changes in market prices, RECs can now be considered a meaningful, profitable market signal for renewable projects.

Making the future of renewable energy in Texas even brighter.

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P.J. Popovic is the CEO of Houston-based Rhythm.

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World's largest student startup competition names teams for 2025 Houston event

ready, set, pitch

The Rice Alliance for Technology and Entrepreneurship has announced the 42 student-led teams worldwide that will compete in the 25th annual Rice Business Plan Competition this spring.

The highly competitive event, known as one of the world’s largest and richest intercollegiate student startup challenges, will take place April 10–12 at Houston's The Ion. Teams in this year's competition represent 34 universities from four countries, including one team from Rice.

Graduate student-led teams from colleges or universities around the world will present their plans before more than 300 angel, venture capital, and corporate investors to compete for more than $1 million in prizes. Last year, top teams were awarded $1.5 million in investment and cash prizes.

The 2025 invitees include:

  • 3rd-i, University of Miami
  • AG3 Labs, Michigan State University
  • Arcticedge Technologies, University of Waterloo
  • Ark Health, University of Chicago
  • Automatic AI, University of Mississippi and University of New Orleans
  • Bobica Bars, Rowan University
  • Carbon Salary, Washington University in St. Louis
  • Carmine Minerals, California State University, San Bernardino
  • Celal-Mex, Monterrey Institute of Technology and Higher Education
  • CELLECT Laboratories, University of Waterloo
  • ECHO Solutions, University of Houston
  • EDUrain, University of Missouri-St. Louis
  • Eutrobac, University of California, Santa Cruz
  • FarmSmart.ai, Louisiana State University
  • Fetal Therapy Technologies, Johns Hopkins University
  • GreenLIB Materials, University of Ottawa
  • Humimic Biosystems, University of Arkansas
  • HydroHaul, Harvard University
  • Intero Biosystems, University of Michigan
  • Interplay, University of Missouri-Kansas City
  • MabLab, Harvard University
  • Microvitality, Tufts University
  • Mito Robotics, Carnegie Mellon University
  • Motmot, Michigan State University
  • Mud Rat, University of Connecticut
  • Nanoborne, University of Texas at Austin
  • NerView Surgical, McMaster University
  • NeuroFore, Washington University in St. Louis
  • Novus, Stanford University
  • OAQ, University of Toronto
  • Parthian Baattery Solutions, Columbia University
  • Pattern Materials, Rice University
  • Photon Queue, University of Illinois, Urbana-Champaign
  • re.solution, RWTH Aachen University
  • Rise Media, Yale University
  • Rivulet, University of Cambridge and Dartmouth College
  • Sabana, Carnegie Mellon University
  • SearchOwl, Case Western Reserve University
  • Six Carbons, Indiana University
  • Songscription, Stanford University
  • Watermarked.ai, University of Illinois, Urbana-Champaign
  • Xatoms, University of Toronto

This year's group joins more than 868 RBPC alums that have raised more than $6.1 billion in capital with 59 successful exits, according to the Rice Alliance.

Last year, Harvard's MesaQuantum, which was developing accurate and precise chip-scale clocks, took home the biggest sum of $335,000. While not named as a finalist, the team secured the most funding across a few prizes.

Protein Pints, a high-protein, low-sugar ice cream product from Michigan State University, won first place and the $150,000 GOOSE Capital Investment Grand Prize, as well as other prizes, bringing its total to $251,000.

Tesla recalling more than 375,000 vehicles due to power steering issue

Tesla Talk

Tesla is recalling more than 375,000 vehicles due to a power steering issue.

The recall is for certain 2023 Model 3 and Model Y vehicles operating software prior to 2023.38.4, according to the National Highway Traffic Safety Administration.

The printed circuit board for the electronic power steering assist may become overstressed, causing a loss of power steering assist when the vehicle reaches a stop and then accelerates again, the agency said.

The loss of power could required more effort to control the car by drivers, particularly at low speeds, increasing the risk of a crash.

Tesla isn't aware of any crashes, injuries, or deaths related to the condition.

The electric vehicle maker headed by Elon Musk has released a free software update to address the issue.

Letters are expected to be sent to vehicle owners on March 25. Owners may contact Tesla customer service at 1-877-798-3752 or the NHTSA at 1-888-327-4236.

Houston space tech companies land $25 million from Texas commission

Out Of This World

Two Houston aerospace companies have collectively received $25 million in grants from the Texas Space Commission.

Starlab Space picked up a $15 million grant, and Intuitive Machines gained a $10 million grant, according to a Space Commission news release.

Starlab Space says the money will help it develop the Systems Integration Lab in Webster, which will feature two components — the main lab and a software verification facility. The integration lab will aid creation of Starlab’s commercial space station.

“To ensure the success of our future space missions, we are starting with state-of-the-art testing facilities that will include the closest approximation to the flight environment as possible and allow us to verify requirements and validate the design of the Starlab space station,” Starlab CEO Tim Kopra said in a news release.

Starlab’s grant comes on top of a $217.5 million award from NASA to help eventually transition activity from the soon-to-be-retired International Space Station to new commercial destinations.

Intuitive Machines is a space exploration, infrastructure and services company. Among its projects are a lunar lander designed to land on the moon and a lunar rover designed for astronauts to travel on the moon’s surface.

The grants come from the Space Commission’s Space Exploration and Aeronautics Research Fund, which recently awarded $47.7 million to Texas companies.

Other recipients were:

  • Cedar Park-based Firefly Aerospace, which received $8.2 million
  • Brownsville-based Space Exploration Technologies (SpaceX), which received $7.5 million
  • Van Horn-based Blue Origin, which received $7 million

Gwen Griffin, chair of the commission, says the grants “will support Texas companies as we grow commercial, military, and civil aerospace activity across the state.”

State lawmakers established the commission in 2023, along with the Texas Aerospace Research & Space Economy Consortium, to bolster the state’s space industry.