Website: [vionxenergy.com](https://vionxenergy.com) (Note: As of the latest available data, the official website may not be active or updated, and information is sourced from secondary web resources.) ### Introduction VionX Energy, founded in 2002 as Premium Power Corp., is a company based in Woburn, Massachusetts, focused on energy storage solutions, particularly vanadium redox flow batteries (VRFBs). The company aimed to deliver long-duration, cost-competitive energy storage systems for grid-scale applications. Specific information on founders and current employee count is not publicly available in recent records, reflecting the limited transparency or activity surrounding the company in recent years. VionX Energy's mission was to optimize proven flow battery technology to provide reliable, safe, and sustainable energy storage with a 20+ year operational life, targeting applications such as renewables integration, EV charging, and industrial microgrids [Crunchbase](https://www.crunchbase.com/organization/vionx-energy). VionX Energy is a private company with no publicly traded stock or ticker symbol. According to available data, the company appears to be inactive as of the latest updates in 2025, with reports indicating it is no longer operational [Tracxn](https://tracxn.com/d/companies/vionx-energy/__MUCftQ5xDSPbYY7-xwuRdvmCzN56WgGc8p6bTolSbaw). Due to this status, much of the information in this report is based on historical data and may not reflect current activities or developments. ### Key Products and Technology VionX Energy specialized in vanadium redox flow battery technology, designed for long-duration energy storage. Below are details of their primary product line: - **VIONX VNX System (Vanadium Redox Flow Battery)** - **Type**: Grid-scale energy storage system - **Technical Specifications**: Modular architecture based on 1 MW power and 2 MWh energy building blocks; capable of discharge durations up to 10 hours at full rated power; operates at 3X higher power density than competitors, according to company claims [Climatescape](https://climatescape.org/organizations/vionx-energy/). - **Fuel Type or Energy Source**: Vanadium electrolyte, processed through proprietary methods for enhanced performance. - **Key Differentiators**: Unrivaled Levelized Cost of Storage (LCOS) for durations over 4 hours due to low capital and operating costs; 20+ year product life with no performance degradation; certified non-flammable and safe for grid applications [Climatebase](https://climatebase.org/company/6838/vionx-energy). - **Development Stage**: Historically, the technology reached a stage of significant durability testing, with stack life demonstrated up to 40 years in lab conditions. However, there are no recent updates on commercial deployment or operational status [The Org](https://theorg.com/org/vionx-energy). - **Target Customers**: Utilities, industrial and commercial microgrids, renewable energy integrators, and EV charging infrastructure providers. Due to the reported inactivity of the company, it is unclear whether these products are still in production or deployment. Historical data suggests a focus on scalable, long-duration storage solutions, but current status remains uncertain. ### Regulatory and Licensing Status As an energy storage company focused on flow battery technology, VionX Energy did not fall under the purview of nuclear-specific regulatory bodies like the U.S. Nuclear Regulatory Commission (NRC). Instead, its regulatory considerations would have included compliance with energy storage safety standards, environmental regulations for battery materials (such as vanadium handling), and grid interconnection rules managed by entities like the [[Federal]] Energy Regulatory Commission (FERC) or state-level public utility commissions. There are no recent public records of specific regulatory milestones or certifications achieved by VionX Energy. Historical information indicates that their systems were engineered to meet grid reliability standards, but updates on compliance or pending approvals are unavailable due to the company’s apparent inactivity [Energy.gov](https://www.energy.gov/oe/articles/arra-sgdp-vionx-energy-distributed-energy-storage-system-formerly-premium-power). The estimated timeline to first commercial deployment, if any, cannot be determined with current data. ### Team and Leadership Information on VionX Energy’s current leadership team is limited due to the lack of recent updates and the company’s inactive status. Historical data from sources like [Bloomberg Markets](https://www.bloomberg.com/profile/company/1322304D:US) and [PitchBook](https://pitchbook.com/profiles/company/51709-24) does not provide up-to-date details on specific executives or their roles. No verified X handles or LinkedIn profiles for key personnel are publicly accessible in the latest data. As a result, this section cannot provide current names or bios for the team. ### Funding and Financial Position VionX Energy raised a total of $152 million over 13 funding rounds from four investors, as reported by [Tracxn](https://tracxn.com/d/companies/vionx-energy/__MUCftQ5xDSPbYY7-xwuRdvmCzN56WgGc8p6bTolSbaw). Specific details on the latest funding round, including date, amount, and lead investors, are not publicly available in recent records. Key institutional investors or strategic backers are also not specified in the latest data. As a private company, VionX Energy does not have a market cap or stock performance data. The company appears to be pre-revenue or without recent commercial contracts, given its reported inactive status. Financial statements or revenue updates are not accessible through public sources like [CB Insights](https://www.cbinsights.com/company/vionx-energy-corp/financials), and there are no indications of current operational income. ### Recent News and Developments | Date | Event | Details | |---------------|------------------------------------|-------------------------------------------------------------------------| | Oct 19, 2025 | Company Status Update | Reported as inactive by Tracxn, with no recent operational activity noted [Tracxn](https://tracxn.com/d/companies/vionx-energy/__MUCftQ5xDSPbYY7-xwuRdvmCzN56WgGc8p6bTolSbaw). | | Unknown, 2025 | No Recent Developments | Lack of news or updates in 2025 regarding funding, partnerships, or projects. | | Unknown, 2025 | No Recent Developments | No further events or milestones reported in available data. | | Unknown, 2025 | No Recent Developments | No further events or milestones reported in available data. | | Unknown, 2025 | No Recent Developments | No further events or milestones reported in available data. | Due to the apparent inactivity of VionX Energy, there are no significant recent events or developments to report for 2025 beyond the confirmation of its non-operational status. Historical events are not included here as they fall outside the current year focus. ### Partnerships and Collaborations There are no recent or active partnerships documented for VionX Energy in the latest available data. Historically, the company aimed to collaborate with utilities and renewable energy integrators for grid-scale storage solutions, as noted in [Energy.gov](https://www.energy.gov/oe/articles/arra-sgdp-vionx-energy-distributed-energy-storage-system-formerly-premium-power). However, specific partner names, agreements, or strategic value cannot be confirmed due to the lack of current information and the company’s inactive status. ### New Hampshire Relevance VionX Energy’s technology, if it were active, could have potential relevance for [[New Hampshire]]’s energy infrastructure needs, particularly in supporting grid stability and renewable integration. The state’s proximity to the ISO New England (ISO-NE) grid and existing infrastructure like [[Seabrook Station]] (a nuclear power plant) could theoretically benefit from long-duration energy storage solutions like VRFBs for balancing intermittent renewable sources such as wind and solar. However, given VionX Energy’s reported inactivity, its technology readiness for deployment in New Hampshire or elsewhere is non-existent at this time. There is no alignment with current NH legislative initiatives like HB 710 or SMR provisions, as the company does not appear to be operational. Potential applications for grid power, data center load, or industrial heat in NH cannot be pursued without active technology development or deployment. There are no documented connections or expressed interest in the Northeast US, including New Hampshire, in recent data. ### Competitive Position In the energy storage sector, particularly for vanadium redox flow batteries, VionX Energy historically positioned itself against competitors like [[Invinity Energy Systems]] and Sumitomo Electric Industries. Below is a brief comparison based on historical data, noting that VionX Energy’s current status impacts its competitive standing: - **Invinity Energy Systems**: A UK-based company actively developing and deploying VRFBs for grid-scale applications. Invinity has operational projects (e.g., Oxford Energy Superhub as noted in posts on X) and appears to lead in current market presence compared to VionX’s inactivity. - **Sumitomo Electric Industries**: A Japanese firm with established VRFB installations globally, offering proven long-duration storage solutions. Sumitomo’s active status and global reach provide a significant advantage over VionX Energy. VionX Energy’s unique advantage was its claim of unrivaled LCOS for discharge durations over 4 hours and a 20+ year product life with no degradation [Climatescape](https://climatescape.org/organizations/vionx-energy/). However, the primary risk is its apparent cessation of operations, rendering it non-competitive in the current market. Without updates or active projects, VionX Energy cannot capitalize on the growing demand for long-duration storage solutions. ### Closing Note VionX Energy, once a promising player in vanadium redox flow battery technology, appears to be inactive as of the latest 2025 data, with no clear trajectory or outlook for revival. **RSS_FEED**: none (Note: No official RSS feed for VionX Energy press releases or news could be located due to the lack of an active official website or investor relations page. Historical data and secondary sources do not provide a current feed.) *Report generated December 24, 2025*