Turn solar into 24×7 power
Store midday surplus and run on sunshine after sunset — with zero downtime.
India’s first productized BESS
WATTBANK
Keep the Sun After Sunset.
A fully integrated, service-led battery energy storage solution — energy audit, right-sized storage design, implementation, 24×7 monitoring and complete lifecycle management. Not just hardware deployment.
- Peak-Hour Energy Cost Reduction
- 15–20% / yr
- Built for Connected Loads
- 500 kW–1MW
- Lithium Iron Phosphate Cells
- LFP
- Design Life
- 25years
Energy storage · New
WATTBANK
Sunlight, on Demand.
India’s first productized Battery Energy Storage Service. Not a box of batteries — a fully managed service that stores your cheapest energy and releases it when grid power costs the most.
Evening peak · 15:00 – 24:00
15–20% lower peak-hour energy costs, every year
Stored solar Grid import
- 01Energy Audit
We read your load curve and tariff before sizing anything.
- 02Right-Sized Design
Storage sized to your evening peak — not a catalogue box.
- 03End-to-End Implementation
Turnkey installation, integration and commissioning.
- 0424×7 Data Visibility
Real-time power flow and health on the WATTBANK dashboard.
- 05Lifecycle Management
Monitoring, maintenance and guaranteed energy delivery.
With WATTBANK you can
Buy the Outcome, Not the Box.
Designed specifically for commercial multi-storey facilities with a connected load between 500 kW and 1 MW — the buildings where evening peaks bite hardest.
Cut peak-hour costs by 15–20%
Discharge into the evening time-of-day window when grid power costs the most.
Guaranteed energy delivery
You buy an energy outcome, not just equipment.
Accelerate net zero
Shift more of your day onto clean power, measurably.
End-to-end, fully managed
Execution and lifecycle support by the team that designed it.
| Buying storage hardware | ||
|---|---|---|
| Sizing | From a product catalogue | Right-sized to your load curve and tariff |
| What you buy | Batteries and an inverter | Guaranteed energy delivery |
| Visibility | Local display, if any | 24×7 real-time dashboard, anywhere |
| After install | Warranty paperwork | Monitoring, maintenance and lifecycle management |
| Accountability | Split across vendors | One partner, end to end |
The first WATTBANK
Commissioned at Home, in Baner.
The inaugural 130 kW WATTBANK system went live at Amar Business Zone, Baner — the same Pune building as our headquarters — paired with 136 kWp of rooftop solar and a 120 kWh LFP battery bank.
- Storage System
- 130kW
- Battery Energy
- 120kWh
- Rooftop Solar
- 136kWp
In the news
The Launch, Covered.
WATTBANK launched in September 2025 and was covered across India’s energy and business press.
- The Hindu BusinessLine · Sep 2025Kalpa Power launches ‘WATTBANK’ BESS, promises 50% peak tariff savings
- pv magazine India · Sep 2025Kalpa Power launches WATTBANK, India’s first productized battery energy storage system
- SolarQuarter · Sep 2025WATTBANK: first 130 kW system commissioned at Amar Business Zone, Baner