Choose the power. Choose the hours.
In a vanadium flow battery, stacks set the power and the tanks set the hours. You choose each one on its own.
Need more power? Add stacks. Need more hours? Add electrolyte. You never buy extra batteries to get longer backup.
Built for daily cycling and long hours
20+ years, no capacity fade
The electrolyte does not degrade. Systems are designed for 15,000+ full cycles over their life.
Non-flammable
Water-based electrolyte with no thermal runaway. Safe to install near people and production lines.
100% depth of discharge
Use the full rated capacity every day without shortening battery life.
Add hours with tanks
Extend duration by adding electrolyte volume. Cost per extra kWh falls as duration grows.
Stays charged for backup
Can sit at high state of charge without the calendar ageing seen in lithium cells. Suited to diesel-generator replacement.
Recoverable vanadium
At end of life the electrolyte can be recovered and reused. It keeps its value.
VRFB and lithium-ion at a glance
General characteristics of each technology. Values vary by product and duty cycle.
| Characteristic | Vanadium flow (VRFB) | Lithium-ion (LFP) |
|---|---|---|
| Typical cycle life | 15,000+ cycles | 4,000–8,000 cycles |
| Design life | 20–25 years | 10–15 years |
| Usable depth of discharge | 100% | 80–90% |
| Fire risk | Non-flammable electrolyte | Thermal runaway possible |
| Best duration | 4–12 hours | 1–4 hours |
| Footprint | Larger | Compact |
| Round-trip efficiency | 78–83% (Saeyon target) | 85–95% |
Where it fits
Diesel generator replacement
Clean, silent backup for manufacturing units and commercial buildings.
Solar time-shifting
Store midday solar output and use it through the evening peak.
Peak demand reduction
Cut maximum-demand charges and time-of-day tariff costs for C&I consumers.
Microgrids and weak grids
Stable supply for campuses, telecom sites and remote installations.
