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| Parameter | Details |
|---|---|
| Client | Jupiter Wagons Limited |
| Partner | Tata Power Renewables |
| System capacity | 3.5 MW (3,500 kW) |
| Type of system | Rooftop solar |
| Location | Kolkata operations facility |
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About Jupiter Wagons Limited
Jupiter Wagons Limited is a leading rail engineering and mobility solutions company, manufacturing freight wagons, rail components, and advanced mobility products that support India’s growing transport infrastructure. At its Kolkata facility, energy powers critical manufacturing processes, including fabrication, welding, and assembly. As the company expands its operations, it remains focused on building cleaner, more efficient, and future-ready manufacturing capabilities.
Background
Rail manufacturing demands reliable, high-volume energy across every stage of production. To improve energy efficiency, reduce grid dependence, and strengthen sustainability, Jupiter Wagons Limited explored rooftop solar as a strategic solution. The company required a system that could deliver strong performance, meet industrial safety standards, and integrate seamlessly with existing operations. To achieve this, it partnered with Tata Power Renewables to install a 3.5 MW rooftop solar plant at its Kolkata facility.
Project snapshot
The challenge
Jupiter Wagons Limited’s Kolkata facility supports demanding manufacturing operations that require high energy input across critical processes. The company needed to reduce its reliance on conventional grid power while ensuring that the shift to solar did not affect ongoing industrial operations.
The key challenges included -
1. High energy demand - Heavy machinery, fabrication units, welding systems, and assembly lines require consistent power to maintain production quality and timelines.
2. Rising operational energy needs - As the company scaled, energy consumption became an important area for cost control and long-term planning.
3. Need for lower grid dependence - Reducing reliance on grid-based conventional energy was important for improving energy resilience and supporting cleaner operations.
4. Sustainability in large-scale manufacturing - Jupiter Wagons Limited wanted to embed renewable energy into its manufacturing process and align operations with the future of greener mobility infrastructure.
5. Live industrial environment - The solar system had to be designed and integrated without disrupting day-to-day factory activity.
6. Safety and reliability requirements - A large rooftop solar installation for an industrial facility needed strong safety architecture, reliable performance, and long-term maintainability.
Jupiter Wagons is turning rooftops into engines of clean manufacturing
The decision
Jupiter Wagons Limited needed a renewable energy partner to design and deploy an industrial-scale rooftop solar system to meet the demands of heavy manufacturing.
Tata Power Renewables brought proven rooftop solar expertise, backed by its long-standing leadership in India’s rooftop solar segment, along with the engineering depth and execution strength required for an industrial facility. The objective was clear: turn Jupiter Wagons Limited’s available rooftop space into a clean energy asset that could support manufacturing efficiency, reduce conventional energy dependence, and strengthen the company’s sustainability journey.
Engineered to deliver clean energy without disruption
Tata Power Renewables deployed a 3.5 MW rooftop solar system at Jupiter Wagons Limited’s Kolkata operations facility. The system was designed to support the energy needs of industrial-scale rail and mobility manufacturing while ensuring safety, reliability, and consistent performance.
The solution included -
1. High-efficiency solar panels - The installation uses high-efficiency solar panels developed at Tata Power’s state-of-the-art facility.
2. Optimized rooftop design - The rooftop layout was planned to maximize solar capture across large industrial roof areas.
3. Consistent year-round performance - The system is designed to deliver dependable performance across seasons, including monsoons and low sunlight periods.
4. Comprehensive safety architecture - The installation includes advanced earthing systems, surge protection devices, and lightning protection mechanisms.
5. Seamless factory integration - The system was integrated with Jupiter Wagons Limited’s existing factory infrastructure and electrical systems to support smooth operations.
By combining engineering, safety, and performance, the rooftop solar plant enables Jupiter Wagons Limited to access cost-effective clean energy from within its own manufacturing campus.
Turning industrial roofs into reliable solar power assets
The 3.5 MW rooftop solar system was planned around the operational needs of an active manufacturing facility. Tata Power Renewables focused on a solution that could deliver clean energy at scale while maintaining safety and reliability across the installation.
Key implementation highlights included -
- Installed capacity - The system has a total installed capacity of 3.5 MW, making it a significant renewable energy addition to the Kolkata operations facility.
- System type - The project uses a rooftop solar model, converting existing industrial roof space into a productive clean energy asset.
- Industrial application - The system supports power requirements linked to manufacturing processes such as cutting, welding, fabrication, assembly, and testing.
- Safety systems - Advanced earthing, surge protection, and lightning protection were built into the project to safeguard people, equipment, and infrastructure.
- Performance planning - The rooftop design was optimized to capture solar energy efficiently across large roof surfaces.
- Operational integration - The solar plant was integrated with the facility’s existing electrical systems to support reliable, clean energy use without interrupting industrial activity.
Forging cleaner mobility beneath a future-ready solar-powered roof
How rooftop solar powers more than energy savings
The rooftop solar installation is helping Jupiter Wagons Limited make clean energy a part of its manufacturing foundation. The project delivers business, operational, and sustainability benefits that support the company’s long-term growth.
Lower carbon emissions
The solar plant helps displace a portion of grid-based conventional electricity, enabling Jupiter Wagons Limited to reduce its carbon footprint and advance its sustainability commitments.
Cost-effective manufacturing
With on-site clean energy generation, the company can reduce dependence on external power and improve the cost efficiency of its manufacturing operations.
Improved operational efficiency
Reliable solar power supports critical production functions such as cutting, welding, fabrication, assembly, and testing. This helps strengthen performance stability across energy-intensive processes.
Stronger ESG and brand value
By integrating renewable energy into rail and mobility manufacturing, Jupiter Wagons Limited reinforces its position as an environmentally responsible player in India’s engineering and infrastructure sector.
Future-ready industrial infrastructure
The project shows how large manufacturing facilities can use rooftop solar to build cleaner, more resilient, and more efficient operations.
A blueprint for future-ready rail manufacturing
The collaboration between Tata Power Renewables and Jupiter Wagons Limited demonstrates how renewable energy can support India’s next generation of mobility and rail infrastructure.
By bringing a 3.5 MW rooftop solar system into its Kolkata operations, Jupiter Wagons Limited is turning industrial rooftops into strategic energy assets. The project proves that cleaner manufacturing is not just a sustainability choice. It is also a practical pathway to energy resilience, cost control, and future-ready growth.
As India’s mobility and infrastructure sectors expand, projects like this underline a broader shift: what works for rail manufacturing can create value across the wider sectors Tata Power Renewables serves.
Toll-free number copy - To explore how rooftop solar can support your business, call us at 1800 25 77777
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