Quino Energy, a company developing water-based organic flow batteries, raised $10 million in Series A funding from Atri Energy Transition, a company focused on the deployment of Long Duration Energy Storage (LDES).
The funding agreement also allows the company to access an additional $6 million in equity funding if necessary, bringing the total investment to up to $16 million.
The company will use this funding to increase the production of its proprietary organic flow battery electrolyte beyond the U.S. and demonstrate it in real-world field pilot projects by pairing it with commercially available flow battery hardware.
Quino Energy focuses on developing flow batteries that store electrical energy in organic molecules called quinones. The company states that these batteries have low capital costs, long life, fire safety, scalability, and local manufacturability, making them suitable for both commercial and grid applications.
“The close of our Series A funding round represents a key milestone for Quino Energy on our mission to establish our safe, low-cost flow batteries as the leading solution for mid- to long-duration energy storage, as well as for multi-cycle per day applications,” said Eugene Beh, Co-Founder and CEO at Quino Energy.
In April, Quino Energy and Long Hill Energy Partners received $10 million grant from the California Energy Commission and $5 million in funding from the U.S. DOE’s Critical Facility Energy Resilience (CiFER) program to support a 5 MWh flow battery deployment in Southern California.
In 2023, the company also raised $1.25 million in a Seed funding round, which saw participation from Energy Revolution Ventures and Doral Energy Tech Ventures, while TechEnergy Ventures increased the size of their earlier investments.
According to Mercom’s 9M and Q3 2025 Funding and M&A for Energy Storage report, VC funding in the sector totaled $2.8 billion in 56 deals, a 4% increase YoY compared to $2.7 billion in 61 deals in 9M 2024. Materials and Components providers received the most VC funding in 9M 2025.
In September, XL Batteries, a provider of Organic Flow Battery solutions, raised $7.5 million from Merrin Investors, the family office of entrepreneur and philanthropist Seth Merrin. With this funding, the company plans to scale its operations, enhance grid resilience, and support energy independence by reducing reliance on foreign supply chains.
