Our daily lives require fundamental necessities — and we're polluting our environment, harming food and air, and compromising our health to meet energy needs. This is why we're moving toward renewable energy, and why gravity is the source we're not yet using.
Existing green energy technologies are efficient on paper, but fragile in practice — dependent on weather, expensive to store, and costly to build.
SOLOGRAVITY is solving India’s renewable energy storage problem: solar and wind power generation is growing rapidly, but India lacks enough reliable, long-duration energy storage to make that power available whenever it is needed.
SOLOGRAVITY, developed by MRSON EQUIPMENTS Pvt. Ltd., is a gravity-based energy storage system (GESS) designed to store surplus renewable electricity and deliver it when required. The system uses excess electricity to lift a heavy mass, storing energy as gravitational potential energy. When power is needed, the mass is lowered in a controlled manner to drive a turbine-generator, converting the stored energy back into electricity for delivery to the grid.
Unlike conventional battery storage, SOLOGRAVITY is designed to operate without water or rare-earth materials, using locally sourced materials and a targeted asset life of up to 50 years. The company aims to provide a long-life, lower-resource alternative to batteries and pumped hydro for supporting India's renewable energy transition.
The proposed system targets 85–90% round-trip efficiency, with a 50 kW pilot intended to validate performance before scaling to a 1 MW commercial plant.
India does not have one universal price for energy storage. Pricing depends on the technology, storage duration, number of cycles, whether charging electricity is included, government subsidies, and the contract structure.
The most useful benchmarks for SOLOGRAVITY are utility-scale battery storage tariffs and pumped-hydro storage costs.
| Storage Model | Recent Indian Benchmark | What the Price Represents |
|---|---|---|
| Standalone BESS, 2-hour system | ₹1.48 lakh/MW/month at the lowest 2025 bid | Capacity-availability payment; typically with government support in the relevant tender |
| Standalone BESS, 4-hour system | ₹2.85 lakh/MW/month at the lowest 2025 bid | Capacity-availability payment |
| Solar + storage | Around ₹2.70–₹3.13/kWh in selected 2025 tenders | Combined electricity supply tariff, not storage alone |
| Pumped hydro | Around ₹7.87–₹8.15/kWh in published cost estimates | Indicative levelised storage cost; project-specific |
There are three common commercial models SOLOGRAVITY can consider.
For example, a 2-hour BESS with a tariff of ₹1.48 lakh/MW/month corresponds to approximately ₹1.23/kWh of discharged energy at two full cycles per day over a 30-day month.
India is rapidly expanding renewable energy capacity, creating an urgent need for reliable, long-duration energy storage. Solar and wind generation are intermittent, while conventional storage solutions face challenges related to battery-mineral imports, shorter asset lifecycles, land requirements and water dependency.
SOLOGRAVITY is positioned to address this emerging gap at a critical moment, driven by four factors:
Surplus electricity lifts the mass — stored as mechanical work
Lifted mass holds gravitational potential — for as long as needed
Mass is lowered in a controlled way to drive the turbine–generator
Power is conditioned to grid standards and dispatched on demand
One clear winner on asset life, footprint, and risk profile.
| Attribute | SOLOGRAVITY | BESS | Pumped Hydro |
|---|---|---|---|
| Asset life | 50 years | 10–15 years | 40–60 years |
| Land intensity | 2.5 acres / MW | ~6 acres / MW | 10+ acres / MW |
| Depth of discharge | 100%, no degradation | Limited cycle life | Site-constrained |
| Water need | None | None | Massive |
| Import exposure | None — local materials | Li / Co / Ni | Turbine imports |
