ThermoVault is the packed-bed thermal battery that replaces fossil-fuel boilers across industry. Charge it with renewable electricity or recovered waste heat, and dispatch clean heat up to 600°C, for 18 hours — at a fraction of the cost of lithium-ion.
Today, most of it still comes from burning coal, diesel, natural gas, furnace oil and LPG. Renewable energy can now replace every bit of it — if it can be stored and delivered as heat, on demand.
Half of all global energy is consumed as heat — more than electricity and transport combined. It is the largest, least-addressed part of the energy transition.
Process industries need continuous high-temperature heat around the clock — for steam, drying, and thermal processing that never stops.
Solar and wind are the cheapest electricity ever produced. Captive solar now delivers power to industry at a fixed low rate — the missing link is storing that energy as heat and dispatching it when industry needs it.
A packed bed of ceramic balls absorbs heat when energy is available and releases it on demand — using nothing more than airflow and stored heat. No exotic chemicals. No degradation. Systems deliver up to 600°C today, with higher-temperature designs under active development.
When renewable energy is cheap and abundant, hot air flows through the packed bed of ceramic balls — made from abundant, locally available materials — transferring heat into the storage medium.
The ceramic balls hold thermal energy with negligible standby loss, locked in by refractory insulation. The system operates under positive air pressure — not a sealed pressure vessel — and never degrades.
When heat is needed, cold air enters from the bottom and exits superheated from the top — up to 600°C today, with higher temperatures under active development — feeding directly into process heat, steam boilers, or a turbine for grid electricity.
A direct solar-to-heat path with one conversion step and 70-80% round-trip efficiency — turning low-cost daytime solar into dispatchable process heat that undercuts LNG/PNG, furnace oil and diesel.
From the global heat problem to how ThermoVault stores and dispatches renewable energy for industry.
Batteries store electricity and give back electricity. ThermoVault stores heat and gives back heat. These are fundamentally different problems — and ThermoVault serves the larger one.
Three conversion steps. Each loses efficiency and adds cost, and needs an extra electric heater — at roughly ₹11,000/kWh (2026).
One conversion step. Direct thermal path. No electric heater. At ₹925/kWh — around 12× cheaper than lithium-ion for storing energy as heat.
Charge ThermoVault in ~6 hours of low-cost captive or open-access solar, store it as heat, and dispatch for up to 18 hours. Delivered heat lands just above coal's cost and well below furnace oil and diesel — so you can decarbonise without the usual cost penalty of switching to oil or gas, at a rate fixed for 15–25 years.
From textile mills to steel plants, from solar farms to grid operators — ThermoVault is engineered for any facility that needs reliable, high-temperature heat at low cost.
Continuous process steam for dyeing, finishing and drying — replacing coal and diesel boilers without stopping the line.
Paint-baking ovens, heat treatment furnaces and foundry pre-heaters — integrated into existing thermal infrastructure.
Hard-to-abate industries needing heat above 600°C — temperatures no battery can reach.
Absorb surplus solar and wind, store it as heat, and enable more renewables to be built and used profitably.
Precise, continuous process heat for reactions, distillation and drying, with flow-controlled temperature accuracy.
Long-duration storage that balances renewable generation and dispatches heat or electricity when the grid needs it.
From pilot units to utility-scale installations, every ThermoVault system is engineered to your exact energy and power requirements.
Buy your ThermoVault system outright, or let us own and operate it while you simply pay for the heat. Two models, one outcome — clean, low-cost industrial heat with no compromise.
Buy your ThermoVault system outright, or let us own and operate it while you simply pay for the heat. Two models, one outcome — clean, low-cost industrial heat with no compromise.
Tell us about your project and our engineers will respond with an initial assessment within 1-2 business days.