Europe's most innovative
zinc battery.
Hybrid flow battery technology built for the future of energy storage — modular, safe, upgradeable, and powered by abundant zinc chemistry.
Two batteries.
One breakthrough platform.
Cayrex builds on a unified zinc-based cell architecture that powers both stationary flow systems and compact drop-in replacements for lead-acid batteries.
Hyperflow Battery
Hybrid flow battery with universal cell architecture — supports multiple zinc chemistries (Zn-Br, Zn-Mn, Zn-I, Zn-Fe) and dual operating modes. One tank, one pump, intermittent operation.
Learn moreAPC Battery
Compact zinc-bromine static battery in standard 12V format — a drop-in replacement for lead-acid. Modular 12/24/36/48V+ stacking, NCD and FCD cell options.
Learn moreEngineered for what comes next.
A platform built around real-world deployment — flexible chemistry, simplified architecture, and a lifecycle that gets better, not worse.
Universal cell architecture
One cell design, multiple zinc chemistries. Adapt the chemistry to the application instead of redesigning the hardware.
Dual operating modes
Switch between static and flow operation. Intermittent pumping only when voltage drops — efficiency without complexity.
Non-flammable & safe
Aqueous electrolyte — no thermal runaway, no fire risk. Safe to install in homes, basements, and dense urban environments.
Modular & upgradeable
Refresh capacity by swapping electrolyte (NCD) or replacing cells (FCD). The battery improves over its lifetime instead of degrading.
Simplified architecture
One tank, one pump — versus two-plus in conventional flow systems. Lower BoP cost, fewer failure points, easier maintenance.
Sustainable by design
Abundant materials, recyclable components, long cycle life. Built on zinc — one of Earth's most accessible and well-understood metals.
From the workbench.
Real prototypes, real cells, real chemistry — built and tested in our lab.
Build tomorrow's energy with us.
Cayrex is independently developed deeptech. Your support — as a partner, investor, or backer — accelerates the path from prototype to deployed product.