From potato-starch-based bioplastics startups to companies developing carbon-coated silicon anodes, here's who's joining Greentown Labs and Browning the Green Space's ACCEL program. Photo via browningthegreenspace.org

Greentown Labs and Browning the Green Space announced the newest cohort for its Advancing Climatetech and Clean Energy Leaders Program, or ACCEL, which works to advance BIPOC-led startups in the climatetech space.

Two Houston companies and one from Austin are among the eight startups to be named to the 2025 group.

“The startups selected for the third ACCEL cohort represent a phenomenal range of energy and climatetech innovations, which underscores our belief that everyone and many solutions must play a role in our community’s collective decarbonization efforts,” Georgina Campbell Flatter, Greentown’s new CEO, said in a release. “We’re proud to welcome these entrepreneurs to our community and eager to see all they’ll achieve throughout the program and beyond!”

Each of the early-stage startups within the cohort will receive $25,000 in non-dilutive grant funding and participate in the year-long program focused on product and technology development, market development, fundraising and management, and team development, according to Greentown. The curriculum is led by VentureWell, a nonprofit with expertise in venture development in climatetech.

The Houston companies include:

  • Carbonext, founded by Olanrewaju Tanimola. The company is leveraging its proprietary, off-the-shelf 3D-graphene technology to develop integrated solutions with carbon-coated silicon anodes to address challenges in the graphite ecosystem, as well as lithium-battery anodes.
  • PLASENE, founded by Sohel Shaikh, Alper Gulludag and Romolo Raciti. The company offers an innovative platform that converts plastic waste into liquid fuel and low-carbon hydrogen through its proprietary catalysts and modular, scalable, pre-engineered units

The remaining six companies are:

  • Inductive Robotics, founded in Austin by Madhav Ayyagari and David Alspaugh. The startup deploys autonomous robots that deliver EV charging directly to parked vehicles in commercial parking facilities, using a subscription-based model.
  • Andros Innovations, founded in Cambridge, Massachusetts by Laron Burrows. The startup has developed a reactor that produces ammonia more cheaply, cleanly and safely than traditional methods do.
  • FAST Metals, founded in Worcester, Massachusetts by Sumedh Gostu and Anthony Staley. It has developed a hydrometallurgical-recovery process capable of extracting iron, aluminum, scandium, titanium, and other rare-earth elements from industrial tailings.
  • Respire Energy, founded in Boston by Dave Hsu, Xiaowei Teng, and Candy Wong. The energy storage startup has developed a safe, low-cost, and long-duration metal-air battery designed for microgrids.
  • Tato Labs, founded in Brooklyn by Mecca McDonald and Mia Dunn. It is developing scalable, innovative, bioplastic products and packaging solutions that leverage potato starch, protect and preserve the natural ecosystem, and minimize plastic waste.
  • Thola, founded in Portland, Maine, by Nneile Nkholise and Lerato Takana. The company provides an on-demand marketplace for commercial-building sustainability and safety management, with a mission to decarbonize old buildings.

ACCEL is supported by the Massachusetts Clean Energy Center (MassCEC), Shell, Equinor, the Growth Capital Division of MassDevelopment, Microsoft and the Barr Foundation.

The accelerator has supported 13 early-stage startups since it was founded in 2023, resulting in $325,000 in grant funding. Houston companies have been represented in each cohort. Click here to see the 2024 cohort and here to see the inaugural 2023 cohort.

A handful of startups will be selected for the third year of the ACCEL program put on by Greentown Labs and Browning the Green Space. Photo via greentownlabs.com

Greentown launches 3rd round of collaborative accelerator for energy tech founders of color

browning the green space

For the third year, Greentown Labs and Browning the Green Space have opened applications for ACCEL, a climatetech accelerator designed to bolster BIPOC-led companies.

The program, which is a year-long commitment providing opportunities across funding, networking connections, resources, and more, has applications open until January 7. Each selected company will receive non-dilutive grant funding up to $25,000, trainings from VentureWell, a desk and membership at Greentown Houston or Boston locations, a BGS membership, and more.

A handful of startups will be selected for the program, which is looking for companies at the two to four Technology Readiness Level (TRL) stage with a technology solution across agriculture, buildings, electricity, manufacturing, resiliency and adaptation, and transportation sectors.

“ACCEL has been amazing," Chidalu Onyenso, founder of Cambridge, Massachusetts-based EarthBond, a member of the 2022 cohort, writes on the website. "I’ve really enjoyed the membership and programming. I think it’s fantastic—if I met another Black or Brown founder focused on climatetech, I’d tell them to apply to this program, 100 percent.”

Earlier this year, the program — which is supported by the Massachusetts Clean Energy Center, Microsoft's Climate Innovation Fund, Equinor, Barr Foundationnamed seven companies to its second cohort and six to its inaugural batch in 2022. The 13 companies across two cohorts so far have received $325,000 in grant funding from the program.

"These BIPOC-led startups are developing climate technologies that will lead us to a more equitable and sustainable future," MassCEC CEO Dr. Emily Reichert, the former CEO of Greentown, said of the second cohort in a news release. "We want ALL climatetech innovators and entrepreneurs to thrive here in Massachusetts. We are proud to support the ACCEL accelerator, created and led by Greentown Labs and Browning the Green Space. The ACCEL program is helping us build a more diverse innovation ecosystem by breaking down barriers and expanding opportunities."

Interested and qualifying companies can apply online.

Houston energy transition folks: Here's what to know this week. Photo via Getty Images

3 things to know: Houston energy co. rings closing bell, events to know about, and more

take note

Editor's note: It's a new week — start it strong with three quick things to know in Houston's energy transition: events not to miss, a win for an energy startup, and more.

Events not to miss

Add these events to your radar:

  • November 30 - Carbon to Value Initiative Year 3 Final Showcase will be streamed online. Register.
  • December 4 - Pumps & Pipes Annual Event is Houston's premier innovation gathering bringing together cross-industry leaders for engaging discussions and top tier networking opportunities. Register.
  • December 7 - Greentown Labs Investor Speaker Series: Both Sides of the Coin will host a thoughtful fireside chat followed by networking. Register.

Houston startup rings NYSE closing bell

A Houston company got to take the national stage by ringing the closing bell at the New York Stock Exchange, and for Katie Mehnert, founder of ALLY Energy, it was a chance to reflect on the progress the industry as a whole has progressed.

"As I stood on the platform at the world’s largest stock exchange to ring the closing bell, surrounded by 130 people from across the energy industry, I saw it clearly: how the private sector will play a major role in getting us to an era of net zero," Mehnert writes in her guest column. Read the full piece here.

Deadline not to miss: ACCEL

Advancing Climatetech and Clean Energy Leaders Program, or ACCEL, has opened applications for it's second cohort. The program — from Greentown Labs and Browning the Green Space — provides access to funding, networking connections, incubation space, mentorship, resources, and opportunities for energy tech founders of color for a year.

“ACCEL is one of the most impactful, meaningful programs we’ve run to date,” Greentown Labs CEO and President Kevin Knobloch says in a news release. “We are eager to expand upon the great success and momentum of year one, and to welcome another incredible cohort of BIPOC-led startups that are developing much-needed climatetech solutions. We’re equally committed to helping these companies accelerate and deploy their solutions, while also helping to build a more diverse, inclusive climatetech workforce—ACCEL sits at the nexus of those two critical efforts.” Read more about the program.

ACCEL has opened applications for next year. Photo via Getty Images

Applications open for inclusive cleantech accelerator

appy now

Calling all cleantech startups founded by innovators of color — an inclusive accelerator program is now accepting applications.

Advancing Climatetech and Clean Energy Leaders Program, or ACCEL, has opened applications for it's second cohort. The program — from Greentown Labs and Browning the Green Space — provides access to funding, networking connections, incubation space, mentorship, resources, and opportunities for energy tech founders of color for a year.

“ACCEL is one of the most impactful, meaningful programs we’ve run to date,” Greentown Labs CEO and President Kevin Knobloch says in a news release. “We are eager to expand upon the great success and momentum of year one, and to welcome another incredible cohort of BIPOC-led startups that are developing much-needed climatetech solutions. We’re equally committed to helping these companies accelerate and deploy their solutions, while also helping to build a more diverse, inclusive climatetech workforce—ACCEL sits at the nexus of those two critical efforts.”

The program, supported by the Massachusetts Clean Energy Center, accelerated six startups this year — Active Surfaces, DrinKicks, EarthBond, florrent, frakktal, and SpadXTech.

“The ACCEL Program directly aligns with our mission to ensure that climatetech jobs and wealth creation opportunities are available to all residents of the Commonwealth,” Emily Reichert, CEO at MassCEC and former CEO at Greentown, says in the release. “We are excited to see the second round of this important program, with our Equity Workforce Fund support fostering a partnership between Greentown Labs and Browning the Green Space aimed at accelerating the growth of minority and women business enterprises in Massachusetts.”

ACCEL, which doles out $25,000 in non-dilutive grant funding to each participant, is also supported by Boston-based Barr Foundation and provides programming from VentureWell, a nonprofit with expertise in climatetech.

“Through our partnership with Greentown and VentureWell, we are able to put our respective strengths together to create an ambitious program to bolster founders of color in climatetech and propel innovations that benefit communities most impacted by climate change,” Kerry Bowie, executive director and president of Browning the Green Space, says in the release. “Opening applications for Year 2 of ACCEL is an important milestone in strengthening critical support for traditionally excluded entrepreneurs in our communities.”

Applications for ACCEL are open until January 5, 2024. While entrepreneurs from anywhere can apply, preference will be given to applicants in Greater Boston and Greater Houston, where Greentown’s incubators are located.

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CultureMap Emails are Awesome

Energy expert on powering Texas by leading globally and acting locally

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Texas is known around the world for shaping energy trends, including conservation efforts. As we reflect on Earth Day this month, let’s take a closer look at where Texas is getting things right and where there is still room for improvement.

Texas is the nation’s top producer of energy across oil, gas, wind and solar power. We have built our identity on the idea of leading the world as a powerhouse for energy production, but Texas also has to deliver results to its residents and the United States; otherwise, our global leadership falls flat.

Measuring Texas’ Global Leadership

Texas is the nation’s largest energy producer, leading the U.S. in wind-powered electricity generation and rapidly expanding its solar capacity, according to the U.S. Energy Information Administration. Our state continues to lead nationally in large-scale energy investments, business-friendly policies and abundant natural resources.

Texas is not standing still or simply doing what it has always done. The state recognizes that to stay competitive, we must adapt and change. Diversification in the areas of liquefied natural gas exports and new investments in carbon and hydrogen capture are defining what the next chapter of Texas’ leadership will look like.

Energy leadership requires production, innovation and influence. Together, these will keep Texas as a formidable force in global energy production.

Our Local Texas Reality Is Important, Too

When we zoom in to look more closely at what is happening in Texas, the picture becomes a bit more nuanced. Our energy independence creates both flexibility and vulnerability, especially during major weather events such as winter storms and hurricanes.

Five years later, the effects of Winter Storm Uri remain in many of our minds. Demand for home generators has risen quickly in the state, with Houston leading the way due to grid uncertainty. As our population continues to rise quickly and more data centers are built in the state, grid stability remains a major factor in Texas’ ability to lead in energy innovation to meet the demands of residents.

ERCOT has developed a three-part plan to help mitigate the risk of grid failure during periods of extreme demand or emergencies. While this is an improvement over five years ago, Texas still needs to invest significantly in grid resiliency.

Texas’ Energy Market and Affordability

Often, proponents of our deregulated energy market in Texas hold it up as an example of healthy competition and consumer choice. Lawmakers claim that it gives residents the ability to select an energy plan that best meets their needs.

In practice, however, the market can be difficult to navigate. There are many electricity plans and providers, so residents often feel overwhelmed when navigating the energy market. With fluctuating rates, complex contracts and peak pricing structures, monthly energy bills can be surprising.

Additionally, as utility companies seek to distribute energy infrastructure costs to customers, prices are rising rapidly. According to TEPRI, electricity rates have risen by 30% since 2021, and the organization predicts an additional 29% increase by 2030.

A 60% increase in electricity prices over less than a decade will affect more than 4.1 million LMI (low- to moderate-income) households in Texas. Conservative projections by TEPRI estimate that by 2030, LMI households will pay an additional $863 annually for electricity, representing an electricity-pricing burden of 8.2%.

The energy affordability crisis is just beginning here in Texas, and greater education and proactive legislation are needed to help LMI households navigate the changing market and rising energy costs. LMI households are already choosing between paying for electricity and healthcare for their family members.

If Texas wants to remain a global leader in energy production, innovation, reliability and affordability, the rising cost of energy needs urgent attention.

Grid Resilience Is Mandatory

In addition to energy affordability, Texas frequently experiences extreme weather, making grid resilience foundational to its continued leadership in both local and global markets.

Between 1980 and 2024, Texas experienced 190 weather-related events with financial losses exceeding $ 1 billion. From hurricanes along the Gulf Coast to prolonged heat waves and drought, the state’s energy infrastructure is under increasing strain. These events necessitate that Texas invest in long-term planning and preparedness for its energy infrastructure.

Next Steps for Local Leadership

Texas needs to strengthen every part of its energy infrastructure. Leading locally means strengthening the grid by building out transmission, scaling battery storage, and deploying smarter, more responsive technology. At the same time, we need to make the market easier to navigate and ensure Texans are better educated and protected as they make energy decisions.

Additionally, as Texans become more informed about the energy landscape, it is crucial to equip them with the knowledge to use energy conservation tools such as programmable thermostats, mobile apps to monitor and adjust energy usage, shifting away from peak-hour usage and selecting energy plans without gimmicks or tricky clauses.

These important intersections are where Texas’ global leadership meets local impact in a critical time of change and transition in the Texas energy landscape.

Going Forward

Beyond addressing the critical issues of reliability and affordability at home here in Texas, it is important to recognize that they are also global. While we already export our energy products to the world, we have a unique opportunity to also export solutions in grid innovation, market design and technologies that are applicable to varied environments and markets around the world.

If we get it right, Texas will be known for not only producing energy but also for shaping how energy systems evolve globally. In order for Texas to lead both locally and globally, we need to focus on performance through smarter infrastructure, thoughtful policy and informed consumers.

Because true energy leadership isn’t just about how much we produce, it’s about performance, access and impact from Texas communities to the global stage, which is an imperative that goes far beyond Earth Day.

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Sam Luna is director at BKV Energy, where he oversees brand and go-to-market strategy, customer experience, marketing execution, and more.

Houston energy transition hub opens applications for new fundraising cohort

apply now

EnergyTech Cypher has opened applications for its second Liftoff fundraising program.

Applications close May 20 for the 10-week virtual fundraising sprint. The program is geared toward energy and climatech founders preparing to raise their first institutional round. It will cover fundraising requisites, like pitch materials, term sheet negotiation and round closing, according to a release from EnergyTech Cypher.

The program kicks off June 1 and runs every Monday from 1-3 p.m. CST. It will conclude with an in-person capstone simulation in Houston on August 3, where founders will work to close a mock round.

Jason Ethier, EnergyTech Cypher founder and CEO, will lead the program with Payal Patel, an EnergyTech fellow and entrepreneur in residence.

The program is available through Cephyron, EnergyTech Cypher's new investor relationship management platform, built specifically for energy and climatech founders. Users must have a Cephyron Boost membership to participate in the Liftoff program.

The Cephyron IRM app recently went live and is available to founders at any point in their fundraising process, according to the news release. The platform aggregates investor data, tracks market signals and delivers curated weekly recommendations.

EnergyTech Cypher launched Liftoff last year. The inaugural cohort included 19 startups, including Houston-based AtmoSpark Technologies, The Woodlands-based Resollant and others. Each participant closed at least one fundraising deal, according to EnergyTech Cypher.

EnergyTech Cypher rebranded from EnergyTech Nexus earlier this year. It also launched its CoPilot accelerator in 2025. The inaugural group presented its first showcase during CERAWeek last month.

EnergyTech Cypher's annual Pilotathon Pilot Pitch and Showcase applications also opened this month. Find more information here.

Houston climatech startup raises $29M funding round​

fresh funding

Houston-based NanoTech Materials has closed a $29.4 million Series A.

The round was led by Austin-based HPI Real Estate & Investments. Houston-based Goose Capital and Austin-based Milliken & Company also participated.

Nanotech has developed its patented Insulative Ceramic Particle (ICP) technology, which reduces heat transfer in buildings and outdoor infrastructure, improving efficiency and safety. It's known for its Cool Roof Coat, Wildfire Shield and Insulative Coat: Cool Touch product lines.

With the new funding, Nanotech plans to scale operations and expand its market reach for its products.

“We’re addressing one of the pressing and urgent challenges facing infrastructure owners today: controlling energy costs and extending asset life,” Mike Francis, CEO and co-founder of NanoTech Materials, said in a news release. “This financing marks a transformative moment for us. It allows us to rapidly scale production and bring our high-performance materials to market faster, while delivering measurable cost savings and redefining what resilience looks like in today’s built environment.”

Nanotech launched in 2020 and was the first company selected for Halliburton Labs. It moved into a 43,000-square-foot space in Katy in 2023. It brought on new partners that expanded the company's reach in the Middle East and Singapore the following year. Its technology was recognized as one of Time magazine's 200 Best Inventions of 2024.

“We were early investors in Nanotech Materials and are pleased to continue supporting the company as it becomes a leader in breakthrough materials science and technology,” John Chaney, investor at Goose Capital and board member at NanoTech, added in the release. “NanoTech’s ability to elevate fire resilience and energy efficiency in the built environment is critical for strengthening and hardening infrastructure. Its pioneered approach is transforming current building standards and making our lives safer.”

The company has secured $34.4 million in total to date, according to the release. It raised an oversubscribed funding round in 2023 and a $5 million seed round in 2020.