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.
Engineering long-duration storage for a self-reliant world
Saeyon Innovations is a Bengaluru deep-tech company developing indigenous vanadium redox flow battery systems, from cell and stack to the complete battery energy storage system.
A self-reliant world powered by clean energy, made possible by long-duration storage everywhere.
Store clean energy. Use it when you need it.
We enable industries and renewable energy producers to store clean energy and use it when they need it, for their own benefit and for the planet's, with long-duration storage designed and made in India.
Deep engineering expertise, focused on one technology.
Saeyon brings together engineers with years of experience across electrochemistry, mechanical design, power electronics, controls and software. We design every part of the system in-house, from the cell stack and electrolyte to the battery management system and monitoring. This lets us innovate quickly and stand behind every system we build.
Cell and stack
Flow-field design, electrode and membrane selection, stack assembly.
Fluid system
Electrolyte circuits, pump drives, pressure-drop optimisation and rebalancing.
Controls and BMS
State-of-charge sensing, protection, PCS integration and remote monitoring.
A containerised vanadium flow battery that delivers 100 kW for six hours. Power and run-time can each be sized to your site.
Specifications are design targets for the system under development and are confirmed for each project.
Size your system
Indicative only. Electrolyte estimate assumes about 25 Wh per litre of total electrolyte. Final sizing follows a site study.
Request a quote for this sizeEnergy stored in liquid, released on demand
A vanadium flow battery keeps its energy in two tanks of electrolyte. Pumps move the liquid through a cell stack, where the energy is stored or released.
- 1Charging. Solar or grid power enters the stack and changes the vanadium in each tank to its charged state.
- 2Storing. The charged liquid waits in the tanks for hours, with no loss of capacity over the years.
- 3Discharging. The liquid flows back through the stack and releases the energy as DC power for your site.
See what storage could save your site
Choose how you would use the battery and tell us about your power cuts. We estimate savings for the system size you picked above, using current Karnataka industrial tariffs.
Savings are after the cost of charging from solar and before battery maintenance. Your payback estimate includes everything.
When does it pay back for your site?
Leave your details. We will send your payback time and a full cost comparison for the numbers above.
How we calculate
- Diesel: fuel at your price plus ₹5/L for logistics, 3.5 kWh per litre, generator servicing every 250 running hours and annual maintenance.
- Each power-cut day uses one full battery cycle, recharged from solar at ₹3/kWh with 80% round-trip efficiency.
- Evening energy is valued at the KERC HT-2(a) energy charge of ₹6.60/kWh, with time-of-day rates for December to June.
- Demand charge of ₹350/kVA a month, reduced by the system's power, plus excess-demand penalties avoided in three months a year.
- If you don't own a generator yet, we include the generator you would no longer need to buy, and its overhaul in year 15.
- Tariffs and diesel prices are held flat, so the estimate is conservative.
Standard configuration
| Rated power | 100 kW (configurable 50–500 kW) |
|---|---|
| Rated energy | 600 kWh (configurable by tank volume) |
| Duration at rated power | 6 h (2–12 h options) |
| Depth of discharge | 100% |
| Design cycle life | 15,000+ cycles |
| Design life | 20+ years |
| DC round-trip efficiency | 78–83% (target) |
| Electrolyte | Vanadium sulfate in dilute sulfuric acid, non-flammable |
| Power conversion | Bi-directional PCS, grid-tied or off-grid |
| Monitoring and control | Integrated BMS with SOC sensing; MODBUS RTU, CAN and MQTT; remote dashboard |
| Enclosure | Containerised, outdoor-rated, with secondary containment |
| Applications | DG replacement, solar shifting, peak shaving, microgrids |
Two independent dials
Add stack modules
Power scales in 25 kW stack modules. Match the peak load you need to carry.
Add electrolyte
Run-time scales with tank volume. Move from 4 to 12 hours without changing the stacks.
Let's size storage for your site
Tell us about your load and backup needs. We will come back with a preliminary sizing.
Saeyon Innovations
Bengaluru, Karnataka, India
saeyon.org
Privacy Policy
Last updated: November 2026
Saeyon Innovations ("we") runs saeyon.org. This policy explains what we collect through this website and how we use it.
What we collect
When you send an enquiry or request a payback estimate, we collect your name, company, email address, phone number, your message, and the values you entered in the savings calculator. We collect nothing else, and we don't use advertising or tracking cookies.
Why we use it
Only to reply to your enquiry, prepare your estimate or proposal, and follow up about it. We don't sell or rent your details, and we don't add you to mailing lists without your consent.
Services we use
- Web3Forms delivers form submissions to our inbox.
- hCaptcha checks that a form is sent by a person, not a bot. It may process technical data such as your IP address, under its own privacy policy.
How long we keep it
As long as needed to respond and for our business records, then we delete it.
Your choices
You can ask us to see, correct or delete your details at any time by writing to inquire@saeyon.org.
Contact
Saeyon Innovations, Bengaluru, Karnataka, India · inquire@saeyon.org