Solar → Flow Battery → Grid

Clean power, stored safely, delivered around the clock.

Ravault Energy builds the full renewable value chain — from solar generation to safe, long-duration flow-battery storage and reliable grid delivery. Indigenized, safe, and cost-effective.

Talk to us Explore the solution

The problem to be solved

Clean energy is abundant — but only when the sun shines and the wind blows.

Solar and wind are now the cheapest sources of new power, yet they are intermittent. Without affordable, long-duration storage, clean electricity cannot be delivered when it is actually needed — after sunset and through peak evening demand.

Intermittency

Solar output collapses at night and dips with weather, leaving a multi-hour gap between generation and demand.

Short-duration storage

Most lithium batteries economically cover only 2–4 hours — far short of the 10+ hours needed to firm up renewables.

Safety risk

Large lithium installations carry thermal-runaway and fire risk, making siting near communities and grids harder.

Geopolitical exposure

Critical battery materials and cells are concentrated in a few countries, exposing energy security to supply shocks.

Cost of firm power

Delivering round-the-clock clean power remains expensive when storage costs stay high per kilowatt-hour.

Grid reliability

Grids need flexible, dispatchable capacity to stay stable as more variable renewables come online.

Dispatchability

Solar power is not dispatchable — it cannot be called on when the grid needs it. Redox flow batteries make solar dispatchable, storing energy to deliver on demand.

Our solution

An end-to-end value chain: Solar → Flow Battery → Grid.

Ravault Energy pairs solar generation with our indigenized flow-battery storage to deliver firm, clean power to the grid — safely and affordably.

Aerial view of a large-scale solar photovoltaic farm

Solar generation

Utility-scale solar produces low-cost clean electricity during the day.

Interior of a grid-scale battery energy-storage facility

Flow-battery storage

Excess energy is stored in safe, long-duration flow batteries for 10+ hours.

Representative energy-storage installation.

High-voltage electricity transmission towers against the sky

Grid delivery

Firm, dispatchable clean power is delivered to the grid whenever it's needed.

Why our flow battery

Safe

Non-flammable, water-based electrolyte. No thermal runaway — safe to site near homes and grids.

Indigenized

Built on a domestic supply chain — energy security that's immune to geopolitical shifts.

Cost-effective

Engineered to make round-the-clock clean power affordable at scale.

10+ hours storage

Long-duration by design — it decouples power from energy to firm up renewables overnight.

The electrochemistry

How a flow battery works

A flow battery stores energy in two liquid electrolytes held in external tanks. Because energy lives in the tanks and power is set by the cell stack, you can scale duration simply by using bigger tanks.

Energy in the tanks, power in the stack

Two electrolytes are pumped from their tanks through a central cell stack. Inside the stack, the liquids are kept apart by an ion-exchange membrane while an electrochemical reaction takes place at each electrode.

Charging: solar electricity drives a reduction–oxidation (redox) reaction, storing energy in the dissolved active species in each tank.
Discharging: the reaction reverses, releasing electrons through the external circuit as usable power while ions cross the membrane to balance charge.
Scaling duration: because energy is stored in the liquid, adding storage hours simply means larger tanks — power and energy scale independently.

Diagram is schematic and simplified to illustrate the working principle.

Let's build reliable clean power together.

Whether you're a utility, developer, or partner, tell us how we can help — or request a meeting at our IIT Bombay office.