Taj Exotica Resort & Spa in Goa has become India’s first hotel to implement a battery energy storage system, partnering with Tata Power in a project that reduces diesel consumption by approximately 200,000 liters annually.
The resort installed a Battery Energy Storage System with approximately 2 MW storage capacity, representing Tata Power’s first deployment of this technology in the hospitality sector. The project involved an investment of approximately 35 million Indian rupees (415,000 US dollars) and is projected to generate annual savings of nearly 15 million rupees ($178,000).
The initiative supports Indian Hotels Company Limited’s decarbonization commitments under its Paathya sustainability framework and aligns with the Tata Group’s Aalingana vision for climate-positive growth.
“The BESS project at Taj Exotica Resort & Spa, Goa is not just an engineering achievement—it is a defining moment in our sustainability journey,” said Ranjit Phillipose, senior vice president of operations for IHCL Goa. “By embracing cutting-edge technology and reducing our reliance on fossil fuels, we are setting new benchmarks for responsible luxury.”
Managing complex power sources
The battery system addresses the operational challenges of managing multiple power sources at the luxury resort. Taj Exotica operates with grid power, diesel generators and solar energy, requiring sophisticated coordination to maintain reliable electricity supply for guests.
Tata Power and IHCL jointly developed an interlocking and protection architecture that includes automated source prioritization logic, prevention of backfeed and overload scenarios, real-time monitoring, advanced safety cut-offs, thermal and surge protections, emergency shutdown protocols and manual override capabilities.
The engineering team led by Athen Chellappa, area director of engineering for Goa, conducted extensive simulations of power outage scenarios to validate system performance. Testing confirmed automatic diesel generator synchronization, priority-based charging from solar and grid sources, interlocking accuracy, changeover timing and cloud connectivity essential for remote operations.
Physical installation was completed in mid-November 2025, followed by full-load testing that demonstrated stable discharge curves and precise switching performance during high-occupancy and peak-load conditions.
Real-time monitoring and predictive maintenance
The battery system is supported by an interactive digital dashboard that provides real-time visibility into energy flows, charging and discharging status, battery health diagnostics and predictive maintenance alerts. The platform also generates detailed historical reports on energy consumption and cost savings.
“Sustainability is at the core of our ethos at Taj Exotica, Goa,” said Sheetal Singh, area director for South Goa and general manager of Taj Exotica Resort & Spa. “The BESS project is an exemplary step in modernizing the way hospitality manages energy.”
The system is expected to reduce approximately 200,000 liters of high-speed diesel consumption annually, resulting in lower carbon emissions and operating costs. Beyond fuel savings, the battery energy storage system improves power quality, minimizes generator runtime and reduces air emissions.
The technology allows the resort to prioritize cleaner energy sources by charging the battery system from solar panels and grid electricity during off-peak periods, then discharging stored energy during peak demand or grid outages. This reduces the frequency and duration of diesel generator operation.
Tata Power executed the installation following detailed technical feasibility studies to assess the resort’s energy consumption patterns, peak demand periods and integration requirements with existing infrastructure.
