Why The BESSt Company

investment inquiries

Press Releases

  • TUCSON, Ariz., Sept. 17, 2025 /PRNewswire/ -- The BESSt Company, founded by Tesla alum Joley Michaelson, has launched a proprietary zinc-polyiodide REDOX flow battery designed for sectors that demand uninterrupted power, data centers, cold storage, and AI infrastructure. Based on breakthrough chemistry licensed from Battelle, The BESSt Company's platform offers multi-hour to multi-day energy storage, safety, affordability, and supply chain resilience, with non-flammable, abundant, rare-earth-free materials, and the most compact footprint in its class. Long-duration energy storage (LDES) is crucial to advancing the energy transition and meeting rising power demand. Read more here»

Awards & Recognitions

  • U.S. startup unveils zinc-polyiodid redox flow battery with energy density of 320 Wh/L

    The BESSt Company announced that its new REDOX flow battery technology delivers 20 times the energy density of conventional vanadium flow storage systems. The battery is based on a zinc–polyiodide redox flow chemistry developed by the Pacific Northwest National Laboratory.

    Read full article here»

  • Renewable Energy Storage Pioneer Builds Empire On Just $7 Million

    While Trump’s policies are putting the squeeze on renewable energy—cutting tax breaks and blocking solar projects—one woman-owned renewable energy storage company is proving it can weather the storm. On just $7 million in equity funding, Joley Michaelson has grown The Sun Company from a single venture into a sprawling network of energy businesses, each targeting a different piece of the industry's broken puzzle—a striking achievement in an industry where only 2.1% of venture capital flowed to female-only founder teams in 2024. Customers include Albertson and Safeway.

    Read full article here»

  • Who we are

    Founded with a vision to transform the energy storage landscape, The BESSt Company™ is at the forefront of battery innovation. Headquartered in Tucson, Arizona, we specialize in developing and delivering next-generation battery solutions that address the limitations of existing technologies. We operate a Battery Center of Excellence from Raleigh, North Carolina.

    We are a start-up at the forefront of energy storage innovation, developing a next-generation redox flow battery utilizing a proprietary zinc polyiodide (ZnI2) chemistry. Our focus is on providing advanced Medium (MDES) and Long Duration Energy Storage (LDES) systems.

  • Our Mission

    To revolutionize energy storage by delivering cutting-edge and sustainable battery solutions that enhance energy efficiency, accessibility, and reliability for all, while embodying responsibility and care for our planet and communities.

    Our vision is to be the leading force in energy storage solutions, transforming how the world harnesses and uses energy, and inspiring a global movement toward sustainable living.

  • Our Belief

    Energy is more than power — it’s potential. For too long, energy has been seen only as “power” — something transactional, centralized, and unpredictable. This view limits energy’s true potential — to empower communities, create resilience, and spark regenerative change.


    And so we exist to Power Possibility 

Executive Bios

  • A woman, Joley Michaelson (CEO of TBC), with long brown hair wearing glasses and a white shirt smiling in front of a yellow background.

    Joley Michaelson, Chief Executive Officer

    Joley Michaelson founded The Sun Company to accelerate the clean energy transition through innovative, best-in-class technology and an industry-redefining business model. As the CEO of a solely woman-owned national renewable energy company and a former Tesla executive, Michaelson is building the energy ecosystem of the future around the globe.

    Under her leadership, TSC has over 20+ patents on best-in-class renewable technologies, such as advanced flow battery technology that reduces reliance on rare earth minerals and Independent Renewable Energy Power Plants (I-REPP™). In 2025 the battery portion of The Sun Company exited the company, becoming The BESSt Company.

    Michaelson, a frequent speaker on the future of energy and values-based business practices, has shared insights with industry leaders from Google and Oracle to Sierra Club Foundation and Morningstar.

  • Jeff Britt

    Jeff Britt, President

    Jeffrey S. Britt is a results-oriented executive with extensive domestic and international experience in leading innovation and developing new products and technologies. He has a demonstrated track record of forming and leading R&D and engineering teams to take complex technical products from initial concepts through to high-yield production.

    With a strong background in the renewable energy and battery industries, Britt has held leadership positions at companies such as Sion Power Corporation and Global Solar Energy, Inc. He has a proven ability to manage complex programs, lead strategic initiatives, and secure significant funding and partnerships. His experience includes spearheading the commercialization of novel battery technology and leading a company sale process that resulted in an acquisition by a major energy company.

    Britt’s core competencies include strategic planning, technical product development, production scale-up, and intellectual property management. He has a Ph.D. in Electrical Engineering from the University of South Florida and has authored 53 publications and holds 25 U.S. Patents.

  • A man, Kevin Meagher (CSO of TBC) with gray hair and a mustache standing outdoors with a green, leafy background, wearing a blue button-up shirt with a logo on it.

    Kevin Meagher, Chief Science Officer

    Kevin Meagher, the visionary Chief Science Officer of The BESSt Company, is at the forefront of revolutionizing the renewable energy landscape. With an unwavering passion, Kevin leads battery development, driving the implementation of cutting-edge technologies such as the Digital Twin, and the zinc polyiodide REDOX flow batteries. His journey into the realm of energy commenced with pivotal roles in mission-critical power for data centers and nuclear applications, both civilian and military, setting the stage for his groundbreaking work in advanced analytics.

    As a biochemist by education, Meagher’s commitment to a balanced approach in the economics of distributed generation is a cornerstone of his work. Years of collecting empirical data and customer feedback have refined, targeted, and validated digital twin technology, playing a pivotal role in enhancing the ongoing energy transition. Kevin's leadership is central to the advancement of energy storage.

    Beyond his role at The BESSt Company, Kevin serves as a subject matter expert for the Department of Defense (DOD) and the Department of Energy (DOE) in critical areas such as flow batteries, high-penetration solar, and microgrids. His impactful projects include spearheading the implementation of the first microgrid in the U.S., followed by successful ventures for major institutions like the FAA, eBay, Bank of America, Fidelity, and RBC.

Downloads

  • Full-Color Logo

    Full color version of The BESSt Company logo.

  • Black and White Logo

    Black and white version of The BESSt Company logo.

  • Technology Overview

    Background on the technology and how it fits in the energy storage market.