The safest battery.
Engineered for decades, not years.
Vanadium redox flow batteries store energy in non-flammable liquid electrolyte. No fires. No toxic gas. No capacity fade. Thirty years of reliable operation.
How vanadium flow batteries work.
A vanadium redox flow battery stores energy as chemical potential in a liquid vanadium electrolyte rather than in solid cells. Two tanks of electrolyte are pumped through a cell stack where the electrochemical reaction takes place. Charge and discharge happen by reversing that reaction.
Because the energy is in the liquid, power output and storage duration scale independently. With lithium-ion, power and energy are packaged together in each cell, so you can't add one without the other. With VRFB, you can: need more hours of storage? Add electrolyte. Need more peak power? Add cell stacks.
The electrolyte operates at ambient temperature. There is no combustible material in the system. Thermal runaway, the failure mode behind lithium-ion battery fires, is physically impossible. See how we develop a project from site assessment to operation.
Built for long-duration, long-life deployment.
How our battery compares to lithium-ion.
Both technologies are used in grid-scale storage. When you're siting a battery near a neighborhood, school, or town center, these differences are worth understanding.
| Metric | Vanadium Flow Battery | Lithium-Ion |
|---|---|---|
| Fire risk | None. The electrolyte is water-based and non-combustible | Present. Requires on-site fire suppression systems |
| Toxic fume risk | None under any condition | Possible during a failure event |
| Required distance from property lines | 10 feet | 30 feet minimum |
| Storage duration | 4 to 12+ hours, expanded by adding electrolyte, not hardware | 2 to 4 hours, fixed at installation |
| System lifespan | 30+ years at full capacity | 10 to 15 years |
| Capacity loss over time | Negligible | 20–30% in the first 10 years |
| Siting near homes and schools | Suitable, with a smaller safety buffer required | Requires larger separation from buildings and people |
| End-of-life disposal | 98%+ recyclable, no hazardous waste | Contains hazardous materials, requires special handling |
Setback requirements per NFPA 855, Standard for the Installation of Stationary Energy Storage Systems, 2023 edition.
Modular by design. Scalable by electrolyte.
Independent Power and Energy Scaling
Increase storage hours by adding electrolyte tanks. Increase peak power by adding cell stacks. VRFB is the only technology where energy capacity and power capacity scale truly independently.
Containerized, Factory-Built Systems
Each system arrives in standard shipping containers with factory-tested components. Installation is faster, quality control is higher, and commissioning is more predictable than field-assembled alternatives.
30-Year Economic Life
A VRFB system installed today will still operate at full rated capacity in 2055. No mid-life battery replacement, no capacity ramp-down. One capital investment supporting three decades of community energy storage, lease revenue, and grid services.
No hazardous waste. Ever.
The vanadium electrolyte retains its chemistry indefinitely and can be reused in future installations. Structural components, tanks, and cell hardware are over 98% recyclable. When a Tremont project reaches end of life, there is no hazardous waste stream, no environmental remediation liability, and no burden passed to your community.