Just what does 'energy transition' mean, anyway? Photo via Shutterstock

The term “energy transition” is fraught with misconceptions, but not just because of the varied interpretation of the term “transition.” The Energy101 series on EnergyCapitalHTX.com brings clarity to both terms with simple and direct information that anyone can understand. As explored in a previous conversation with ChatGPT, we are all part of the Energy Industry, so its high time we all understood it.

DEFINING TERMINOLOGY

Merriam-Webster defines transition as “a change or shift from one state, subject, place, etc. to another.” The popular interpretation of ‘energy transition’ implies a complete shift away from energy produced from fossil fuels to energy produced from renewable sources. This isn’t entirely accurate–let’s explore why.

“The challenge of our lifetime is addressing [the] dual challenge of meeting increased global energy demand while confronting global climate change” says Jane Stricker, executive director of the Houston Energy Transition Initiative and senior vice president, Greater Houston Partnership. This globally inclusive definition of ‘energy transition’ focuses on addressing objectives instead of proffering solutions–a common project management viewpoint through which opportunities are explored.

It's a simple, but effective, way to expand one’s line of thinking from acute problem solving to broader root-cause analysis. In other words, it is how we elevate from playing checkers to mastering chess.

DEFINING THE OPPORTUNITY

The United Nations tells us the world’s population reached 8 billion in late 2022, an increase of more than one billion people in just over a decade. During the same time frame, the number of people around the world without consistent access to electricity declined from approximately 1.2 billion to 775 million per the International Energy Agency (IEA) 2022 World Energy Outlook report. A commendable feat, no doubt, but the fact remains that about 10% of the world’s population still lives in energy poverty–and that number is increasing.

The first half of Stricker’s sentiment, the challenge of “meeting increased global energy demand” reflects these statistics, albeit almost poetically. To state the issue more plainly, one could ask, “how do we get more energy to more people?” Taking it one step further, we can split that inquiry into two basic questions: (1) how to get more energy, and (2) how to reach more people. This is where it gets interesting.

As explored in the inaugural Energy 101 article, energy is converted into usable form through one of three reactions. Mechanical and nuclear reactions that create electricity for immediate consumption are often deemed “cleaner” than those produced by chemical reaction, but the challenges of delivering more energy consistently and reaching more people are left shortchanged due to intermittent production and limited distribution mechanisms.

In recent history, this has left us to rely upon energy produced by chemical reactions from fossil fuels and/or batteries. Batteries have inherently been the more expensive option, mostly because of the limited supply of minerals necessary to effectively store and transport energy for later use in these contained systems. Hence, the heavy reliance on cheap fossil fuels.

REFINED CONSTRAINTS DEMAND NEW SOLUTIONS

With price as the determining factor influencing the modern world’s energy supply, oil and natural gas have scrambled to compete with coal, which is affordable and easily transportable. However, coal has one major drawback–using it accounts for approximately 20% of carbon emissions, more than oil and gas industrial use, combined, per calculations from the U.S. Energy Information Agency.

We have a duty to get more energy to more people, “while confronting global climate change,” as Stricker states. In the context of energy poverty, where more consistent access to more electricity needs to reach more people, energy needs not only be abundant, reliable, affordable, and accessible, but also, less toxic.

So far, we have yet to find a solution that meets all these conditions, so we have made trade-offs. The ‘energy transition’ merely reflects the energy industry’s latest acceptance of the next hurdle to enhance our lives on earth. As depicted by the image from the IEA below, it most certainly reflects a reduction in the reliance on coal for electricity production, but how that energy reduction will be off set remains yet to be determined.

It's an opportunity ripe for exploration while existing sources push to meet the expanding definition of sustainable energy–a shift in evaluation criteria, some might say. Perhaps even a transition.

Stacked chart showing demand of natural gas, coal, and oil from 1900 to 2050 (estimated)Demand for natural gas and oil are expected to level out, as demand for coal shrinks to meet goals for lower carbon emissions. Photo courtesy of IEA, license CC by 4.0Demand for natural gas and oil are expected to level out, as demand for coal shrinks to meet goals for lower carbon emissions. Photo courtesy of IEA, license CC by 4.0


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Lindsey Ferrell is a contributing writer to EnergyCapitalHTX and founder of Guerrella & Co.

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Houston geothermal company raises $97M Series B

fresh funding

Houston-based geothermal energy startup Sage Geosystems has closed its Series B fundraising round and plans to use the money to launch its first commercial next-generation geothermal power generation facility.

Ormat Technologies and Carbon Direct Capital co-led the $97 million round, according to a press release from Sage. Existing investors Exa, Nabors, alfa8, Arch Meredith, Abilene Partners, Cubit Capital and Ignis H2 Energy also participated, as well as new investors SiteGround Capital and The UC Berkeley Foundation’s Climate Solutions Fund.

The new geothermal power generation facility will be located at one of Ormat Technologies' existing power plants. The Nevada-based company has geothermal power projects in the U.S. and numerous other countries around the world. The facility will use Sage’s proprietary pressure geothermal technology, which extracts geothermal heat energy from hot dry rock, an abundant geothermal resource.

“Pressure geothermal is designed to be commercial, scalable and deployable almost anywhere,” Cindy Taff, CEO of Sage Geosystems, said in the news release. “This Series B allows us to prove that at commercial scale, reflecting strong conviction from partners who understand both the urgency of energy demand and the criticality of firm power.”

Sage reports that partnering with the Ormat facility will allow it to market and scale up its pressure geothermal technology at a faster rate.

“This investment builds on the strong foundation we’ve established through our commercial agreement and reinforces Ormat’s commitment to accelerating geothermal development,” Doron Blachar, CEO of Ormat Technologies, added in the release. “Sage’s technical expertise and innovative approach are well aligned with Ormat’s strategy to move faster from concept to commercialization. We’re pleased to take this natural next step in a partnership we believe strongly in.”

In 2024, Sage agreed to deliver up to 150 megawatts of new geothermal baseload power to Meta, the parent company of Facebook. At the time, the companies reported that the project's first phase would aim to be operating in 2027.

The company also raised a $17 million Series A, led by Chesapeake Energy Corp., in 2024.

Houston expert discusses the clean energy founder's paradox

Guest Column

Everyone tells you to move fast and break things. In clean energy, moving fast without structural integrity means breaking the only planet we’ve got. This is the founder's paradox: you are building a company in an industry where the stakes are existential, the timelines are glacial, and the capital requires patience.

The myth of the lone genius in a garage doesn’t really apply here. Clean energy startups aren’t just fighting competitors. They are fighting physics, policy, and decades of existing infrastructure. This isn’t an app. You’re building something physical that has to work in the real world. It has to be cheaper, more reliable, and clearly better than fossil fuels. Being “green” alone isn’t enough. Scale is what matters.

Your biggest risks aren’t competitors. They’re interconnection delays, permitting timelines, supply chain fragility, and whether your first customer is willing to underwrite something that hasn’t been done before.

That reality creates a brutal filter. Successful founders in this space need deep technical knowledge and the ability to execute. You need to understand engineering, navigate regulation, and think in terms of markets and risk. You’re not just selling a product. You’re selling a future where your solution becomes the obvious choice. That means connecting short-term financial returns with long-term system change.

The capital is there, but it’s smarter and more demanding. Investors today have PhDs in electrochemistry and grid dynamics. They’ve been burned by promises of miracle materials that never left the lab. They don't fund visions; they fund pathways to impact that can scale and make financial sense. Your roadmap must show not just a brilliant invention, but a clear, believable plan to drive costs down over time.

Capital in this sector isn’t impressed by ambition alone. It wants evidence that risk is being retired in the right order — even if that means slower growth early.

Here’s the upside. The difficulty of clean energy is also its strength. If you succeed, your advantage isn’t just in software or branding. It’s in hardware, supply chains, approvals, and years of hard work that others can’t easily copy. Your real competitors aren’t other startups. They’re inertia and the existing system. Winning here isn’t zero-sum. When one solution scales, it helps the entire market grow.

So, to the founder in the lab, or running field tests at a remote site: your pace will feel slow. The validation cycles are long. But you are building in the physical world. When you succeed, you don’t have an exit. You have a foundation. You don't just have customers; you have converts. And the product you ship doesn't just generate revenue; it creates a legacy.

If your timelines feel uncomfortable compared to software, that’s because you’re operating inside a system designed to resist change. And let’s not forget you are building actual physical products that interact with a complex world. Times are tough. Don’t give up. We need you.

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Nada Ahmed is the founding partner at Houston-based Energy Tech Nexus.

Houston maritime startup raises $43M to electrify cargo vessels

A Houston-based maritime technology company that is working to reduce emissions in the cargo and shipping industry has raised VC funding and opened a new Houston headquarters.

Fleetzero announced that it closed a $43 million Series A financing round this month led by Obvious Ventures with participation from Maersk Growth, Breakthrough Energy Ventures, 8090 Industries, Y Combinator, Shorewind, Benson Capital and others. The funding will go toward expanding manufacturing of its Leviathan hybrid and electric marine propulsion system, according to a news release.

The technology is optimized for high-energy and zero-emission operation of large vessels. It uses EV technology but is built for maritime environments and can be used on new or existing ships with hybrid or all-electric functions, according to Fleetzero's website. The propulsion system was retrofitted and tested on Fleetzero’s test ship, the Pacific Joule, and has been deployed globally on commercial vessels.

Fleetzero is also developing unmanned cargo vessel technology.

"Fleetzero is making robotic ships a reality today. The team is moving us from dirty, dangerous, and expensive to clean, safe, and cost-effective. It's like watching the future today," Andrew Beebe, managing director at Obvious Ventures, said in the news release. "We backed the team because they are mariners and engineers, know the industry deeply, and are scaling with real ships and customers, not just renderings."

Fleetzero also announced that it has opened a new manufacturing and research and development facility, which will serve as the company's new headquarters. The facility features a marine robotics and autonomy lab, a marine propulsion R&D center and a production line with a capacity of 300 megawatt-hours per year. The company reports that it plans to increase production to three gigawatt-hours per year over the next five years.

"Houston has the people who know how to build and operate big hardware–ships, rigs, refineries and power systems," Mike Carter, co-founder and COO of Fleetzero, added in the release. "We're pairing that industrial DNA with modern batteries, autonomy, and software to bring back shipbuilding to the U.S."