Q&A: The breakthrough energy tech that could replace batteries forever

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Manas Pathak's insights offer a glimpse into the future of energy storage and the innovations that companies like Earthen are bringing to the table. Photo via earthen.energy

In the rapidly evolving world of energy technology, few innovations hold as much promise as the solutions being developed by Earthen.

We recently had the opportunity to sit down with Manas Pathak, the CEO and co-founder of Earthen, to delve into the company's groundbreaking thermo-mechanical energy storage system. In this Q&A, we explore the core of Earthen's technology, its potential impact on the energy sector, and what the future holds.

Manas Pathak's insights offer a glimpse into the future of energy storage and the innovations that companies like Earthen are bringing to the table. As the energy sector continues to evolve, solutions like these will play a pivotal role in shaping a sustainable future.

Energy Tech Startups: Can you explain the unique approach Earthen takes with its thermo-mechanical energy storage using supercritical CO2?

ManasPathak: Certainly. At Earthen, we've developed a thermo-mechanical energy storage solution that leverages supercritical CO2. This phase of CO2, achieved at high pressures and temperatures, behaves both as a liquid and a gas. It's central to our technology, offering a compact, safe, and cost-effective solution for long-duration energy storage. Think of it as a modern take on compressed air storage but using CO2 for superior results.

Q: With so many energy storage solutions emerging, what sets Earthen's system apart in terms of efficiency?

MP: Our system boasts a competitive round-trip efficiency of 78%, which is quite remarkable. To put it in perspective, this efficiency rivals that of lithium-ion batteries. The use of supercritical CO2 is central to achieving this efficiency, allowing us to harness its unique properties for optimal energy storage and retrieval.

Q: How does Earthen's technology integrate with existing infrastructure, like pipelines?

MP: One of the exciting applications of our technology is its ability to retrofit pipelines, converting them into energy storage assets. This means that existing infrastructure, like pipelines initially designed for other purposes, can be repurposed and utilized for energy storage, maximizing the use of resources and reducing the need for new constructions.

Q: What are Earthen's plans for the future, especially in terms of product launches and market presence?

MP: We're quite ambitious about our roadmap. We aim to launch our first commercial product by 2026-2027. As for our market strategy, we're targeting a diverse range of customer segments, from utility-scale energy storage to commercial-industrial spaces. Our mission is to democratize access to clean energy on a global scale, and we're taking concrete steps to realize that vision.

Q: Lastly, what inspired the creation of Earthen and its focus on equitable energy distribution?

MP: Growing up in India, I witnessed firsthand the disparities in energy consumption. The smallest homes often faced the longest power outages. This early realization highlighted the need for equitable energy distribution. At Earthen, our end goal is to see clean electrons reaching every corner of the globe, ensuring that everyone has access to reliable and sustainable energy.

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This conversation has been edited for brevity and clarity. Click here to listen to the full episode.

Hosted by Jason Ethier and Nada Ahmed, the Digital Wildcatters’ podcast, Energy Tech Startups, delves into Houston's pivotal role in the energy transition, spotlighting entrepreneurs and industry leaders shaping a low-carbon future. Digital Wildcatters is a Houston-based media platform and podcast network, which is home to the Energy Tech Startups podcast.

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New research center at Rice aims to work toward strict EPA standards for forever chemicals

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Rice University announced a new research center that will focus on per- and polyfluoroalkyl substances (PFAS) called the Rice PFAS Alternatives and Remediation Center (R-PARC).

R-PARC promises to unite industry, policy experts, researchers, and entrepreneurs to “foster collaboration and accelerate the development of innovative solutions to several PFAS challenges,” according to a news release. Challenges include comprehensive PFAS characterization and risk assessment, water treatment infrastructure upgrades, contaminated site remediation, and the safe alternatives development.

“We firmly believe that Rice is exceptionally well-positioned to develop disruptive technologies and innovations to address the global challenges posed by PFAS,” Rice President Reginald DesRoches says in a news release. “We look forward to deepening our relationship with ERDC and working together to address these critical challenges.”

The Environmental Protection Agency issued its stringent standards for some of the most common PFAS, which set the maximum contaminant level at 4.0 parts per trillion for two of them. Pedro Alvarez, Rice’s George R. Brown Professor of Civil and Environmental Engineering, director of the WaTER Institute, likened this in a news release to “four drops in 1,000 Olympic pools,” and also advocated that the only way to meet these strict standards is through technological innovation.

The center will be housed under Rice’s Water Technologies Entrepreneurship and Research (WaTER) Institute that was launched in January 2024. The WaTER Institute has worked on advancements in clean water technology research and applications established during the decade-long tenure of the Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment, which was funded by the National Science Foundation.

“The challenge of PFAS cuts across several of the four major research trajectories that define Rice’s strategic vision,” Rice’s executive vice president for research and professor of materials science and nanoengineering and physics and astronomy Ramamoorthy Ramesh, adds in the release. “R-PARC will help focus and amplify ongoing work on PFAS remediation at Rice.”

The ERDC delegation was led by agency director David Pittman who also serves as the director of research and development and chief scientist for the U.S. Army Corps of Engineers. ERDC representatives also met with several Rice researchers that were involved in work related to the environment, and sustainability, and toured the labs and facilities.

Texas ride-hailing app grows Houston fleet with EV additions

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Your next Alto ride might be electric. The Dallas-based car service has rolled out electric vehicles in Houston.

Alto, founded in Dallas in 2018 and launched in Houston in 2020, elevates ridesharing with its own fleet of company-owned, clearly branded SUVs driven by its staff of drivers. The company previously announced its plans to evolve its fleet into being completely electric, and the first EVs have hit the road, according to a company email.

"Our EV additions to the Houston fleet mark an important moment in our commitment to significantly reduce Alto's environmental impact," reads the email sent on September 5.

The new cars offer similar features to its existing fleet, including legroom, phone chargers, water bottles for riders, and more. Plus, the new cars — Kia EV9 — boast a quieter ride.

Alto has consistently grown in its Texas markets — which include Houston and Dallas — over the years, including expanding into Houston's suburbs.

Will Coleman, CEO of Alto, previously wrote in a guest column for InnovationMap that his priorities for starting the company included safety — but also sustainability. For years, Alto has been expressing interest in introducing EVs, with plans of having a completely electric fleet.

"This EV vision is one example of how a rideshare company can build a better and more accountable industry, and these steps also give Houstonians a more responsible and sustainable transportation solution," Coleman writes.

CenterPoint's big resiliency plan, Houston energy co. acquired, and more top news from the week

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Editor'snote: From CenterPoint doubling down on resiliency to Ethos Energy being acquired, these are the top headlines that resonated with EnergyCapital readers on social media and daily newsletter this week.

CenterPoint Energy announces $5B expanded resiliency plan

CenterPoint has committed to "the largest investment in Greater Houston infrastructure in the company's nearly 160-year history." Photo via Getty Images

CenterPoint Energy disclosed that it's completed its core resiliency actions first phase of its Greater Houston Resiliency Initiative. The company also reports that it's outlined extra upcoming efforts.

Following the unprecedented outages of Hurricane Beryl, CenterPoint outlined its GHRI in August. As of last week, the first phase, which included more than 40 critical actions in total to strengthen the electric grid, has been completed ahead of schedule.

The company also announced a second phase of GHRI and approximately $5 billion in resiliency investment from 2026 to 2028, a figure that's around twice as much as initially promised. Continue reading.

Houston energy equipment service provider acquired by New York PE firm

One Equity Partners announced the acquisition of EthosEnergy, which focuses on rotating equipment services for power generation, energy, industrial, and aerospace and defense industry.

Houston-based energy equipment service provider EthosEnergy has been acquired by a New York private equity firm.

One Equity Partners announced the acquisition of EthosEnergy, which focuses on rotating equipment services for power generation, energy, industrial, and aerospace and defense industry. The terms of the deal were not disclosed. Continue reading.

Texas energy company partners with Ford for first-of-its-kind deal

Ford Motor Company and TXU Energy are partnering to create a first-of-its-kind retail energy offering for Ford electric SUV and truck customers in Texas via the TXU Free EV Miles program. Photo courtesy of Ford

Buckle up, Ford drivers and TXU Energy customers — you're going to want to speed toward this deal.

Ford Motor Company and TXU Energy are partnering to create a first-of-its-kind retail energy offering for Ford electric SUV and truck customers in Texas via the TXU Free EV Miles program.

The program offers Ford EV customers the opportunity to charge their vehicle at home for free during an 18-hour window. Enrollment for the “Free EV Miles program” is open to interested Ford and TXU Energy customers. Continue reading.

Roundup: Navigating Houston's two September climate-focused weeks

Houston is playing host to a ton of energy and climate-focused events next month. Photo courtesy of the Ion

Two separate weeks of climate and energy-focused weeks are organizing events and programming during the second week of September — here's what all to consider attending. Continue reading.

Texas lands largest portion of energy efficiency-focused federal grant program

The DOE funding will go toward the creation of a new Texas-based revolving loan fund that operationally matches the existing Texas LoanSTAR revolving loan program. Photo via Getty Images

Texas is among one of 17 states and territories to receive a portion of $66 million in awards for initiatives that pump federal dollars into their communities to support energy efficient projects.

The funds come from the U.S. Department of Energy's Energy Efficiency Revolving Loan Fund (RLF) Capitalization Grant Program. The RLF Program awards are intended to be put toward state-based loans and grants that go towards local businesses homeowners, and public spaces for "for energy efficiency audits, upgrades, and retrofits to increase energy efficiency," according to the DOE. Continue reading.

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