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- VionX Energy
VionX Energy Funding, Investors & Competitors
VionX Energy has raised $114M across 3 funding rounds, most recently a $26M undisclosed-stage round in June 2018.
Last VionX Energy funding round
$26M
Undisclosed stage · Jun 2018
Cumulative funding VionX Energy raised
$114M
across 3 funding rounds
Key investors in VionX Energy
VantagePoint Capital Partners
Starwood Energy Group Global
NYSERDA
About VionX Energy
VionX Energy is a Woburn-headquartered manufacturer of vanadium redox flow batteries for long-duration energy storage. Founded in 2002, its VNX product line uses 1 MW power and 2 MWh modular blocks for grid-scale applications exceeding four-hour discharge. The systems target renewables integration, EV charging, microgrids, and industrial power, achieving over 20-year lifespans without degradation.
Founded
2002
HQ
Website
Status
Privately held
Customer focus
B2B
Revenue model
Product sales
Sectors
VionX Energy Funding History
VionX Energy has raised a total of $114M across 3 funding rounds.
VionX Energy's first fundraising round was a $58M undisclosed-stage round in June 2015. The most recent completed round was a $26M undisclosed-stage round in June 2018.
VionX Energy funding rounds
| Date | Stage | Investors | Raised | Deal Summary |
|---|---|---|---|---|
| Jun 2018 | Undisclosed stage | Starwood Energy Group Global; VantagePoint Capital Partners; NYSERDA | $26M | VionX Energy, founded in 2014, developed grid-scale vanadium redox flow battery (VRFB) technology for long-duration energy storage. The company employed proprietary vanadium redox flow chemistry with optimization invented by United Technologies Corporation, creating competitive solutions with long runtime across a twenty-year horizon. VionX raised a total of $139M across its lifetime with investors including Largo Clean Energy, VantagePoint Capital Partners, and Starwood Energy Group. The company invested over $150 million in capital to develop its flow battery technology. In December 2020, Largo Resources acquired VionX Energy's intellectual property, hiring core members of VionX's technical team and inheriting the optimization work VionX had undertaken over many years of development. |
| Apr 2018 | Undisclosed stage | - | $30M | VionX Energy Corp, a US-based manufacturer of vanadium flow batteries for long-duration grid-scale energy storage including renewables shifting and firming, secured approximately $58.2 million in gross proceeds from 11 equity investors around April 2018, as per SEC filings. The Massachusetts company, formerly Premium Power Corp, aimed to raise an additional $5 million to meet its funding target, with partners including United Technologies Corp, Jabil Circuit Inc, Vantage Point, and Starwood Energy Group. Its vanadium flow batteries offer six to 10 hour runtime, optimized storage capacity, and long-term power output. Earlier reports from 2017 noted cumulative funding reaching at least $79 million, while a subsequent $5 million debt and equity raise brought totals to $85 million. Overall, VionX raised $139 million across 8 rounds, culminating in an acquisition by Largo Clean Energy on December 8, 2020. |
| Jun 2015 | Undisclosed stage | Starwood Energy Group Global (lead); VantagePoint Capital Partners (lead) | $58M | VionX Energy, a Massachusetts-based manufacturer of vanadium flow batteries for long-duration grid-scale energy storage, secured approximately $58.2 million in gross proceeds in a funding round around June 2015, with participation from 11 equity investors including Starwood Energy Group Global and VantagePoint Capital Partners. The company, formerly known as Premium Power Corp., aimed to raise up to $63 million total, leaving $5 million more needed to meet its target. VionX specializes in vanadium redox flow batteries offering 6-10 hour runtime, optimized for renewables shifting, firming, and long-term power output, with partnerships including United Technologies Corp, Jabil Circuit Inc, Siemens, 3M, and others. This 2015 round marked VionX as the top VC-funded company in the battery storage sector that year according to Mercom Capital Group, highlighting its prominence amid $1.7 billion raised across smart grid, battery storage, and efficiency sectors. The funding supported development of grid-scale flow battery systems, with operational deployments including a 160 kW/4-hour system at Fort Devens Army Reserve base and a 500 kW/6-hour system at Holy Name High School in Worcester, Massachusetts. Subsequent funding activity included a $27 million raise in December 2017 from McCall Partners, Starwood Energy Group Global, and VantagePoint Capital Partners, bringing total capital to at least $79 million by early 2017 and reportedly $193 million cumulatively by later accounts. |
Who has invested in VionX Energy?
3 investors have backed VionX Energy across its funding rounds, including VantagePoint Capital Partners, Starwood Energy Group Global and NYSERDA.
Lead investors include Starwood Energy Group Global and VantagePoint Capital Partners.
VionX Energy Investors
| Investor | HQ | Rounds | Role | First check |
|---|---|---|---|---|
| 2 | Lead | Jun 2015 | ||
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Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples
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Start Free TrialVionX Energy Competitors
VionX Energy competitors include listed companies like Tesla, CATL, LG Energy Solution and Vistra, and private ones like SK on and Base Power.
| Company | HQ | Status | Revenue | EBITDA | Valuation | Revenue Multiple |
|---|---|---|---|---|---|---|
| Publicly listed | $95B | $10B | $1.4T | 13.8x | ||
| Publicly listed | $63B | $16B | $214B | 2.1x | ||
| Publicly listed | $17B | $3.4B | $62B | 3.9x | ||
| Publicly listed | $18B | $5B | $48B | 3.3x | ||
| Private | - | - | $17B | - | ||
| Private | - | - | $13B | - |
VionX Energy Public Comps
VionX Energy is still privately-owned, but its public comps include Tesla, CATL, LG Energy Solution, Vistra, LG Chem, Enlight Renewable Energy, Ecopro, Canmax Technologies, EnerSys and Royal Vopak.
| Last FY | EV/Revenue | EV/EBITDA | ||||||
|---|---|---|---|---|---|---|---|---|
| Revenue | EBITDA | Last FY | LTM | 2027E | Last FY | LTM | 2027E | |
| $95B | $10B | 15.0x | 13.8x | 140.8x | 97.4x | |||
| $63B | $16B | 2.8x | 2.1x | 11.0x | 9.2x | |||
| $17B | $3.4B | 4.8x | 3.9x | 24.1x | 22.2x | |||
| $18B | $5B | 4.0x | 3.3x | 13.9x | 10.2x | |||
| $33B | $3.2B | 1.3x | 1.2x | 13.9x | 8.7x | |||
| $582M | $461M | 27.5x | - | 34.7x | - | |||
| $2.5B | $60M | 5.0x | - | 208.8x | - | |||
| $1.1B | $162M | 6.6x | 3.4x | 46.0x | 9.9x | |||
This data is available for Pro users. Sign up to see all VionX Energy competitors and their valuation data. Start Free Trial | ||||||||
Common questions about VionX Energy
| When was VionX Energy founded? | VionX Energy was founded in 2002. |
| Where is VionX Energy headquartered? | VionX Energy is headquartered in Boston, MA, United States. |
| Is VionX Energy publicly listed? | No, VionX Energy is a private, VC-backed company. |
| How much funding has VionX Energy raised? | VionX Energy has raised $114M across 3 funding rounds. |
| What was VionX Energy's last funding round? | VionX Energy's last funding round was a $26M undisclosed-stage round in June 2018. |
| Who are VionX Energy's investors? | VionX Energy's investors include Starwood Energy Group Global, VantagePoint Capital Partners and NYSERDA. |
| Which companies are comparable to VionX Energy? | Companies comparable to VionX Energy include Tesla, CATL, LG Energy Solution, Vistra, SK on and Base Power. |
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