Indian industry and captive renewable energy

Indian companies are increasingly investing in captive renewable energy to secure more predictable electricity costs, reduce dependence on the power grid and limit exposure to supply disruptions, turning clean power into a strategic business decision rather than solely a sustainability commitment, according to a bwsustainabilityworld.com report. Indian automakers are increasingly looking towards captive renewable energy as well and are investing in captive and group captive renewable projects to secure more predictable electricity costs.

As explained by a powerup.at article, captive power generation refers to the production of electricity by a generation facility primarily for its own consumption. Instead of relying on a distant utility company to transmit power over hundreds of kilometres of cables (incurring losses along the way), a captive power plant handles generating electricity directly on site. This is the ultimate form of distributed generation. The producer and the consumer are the same entity. The user is typically energy-intensive industries like steel mills, chemical plants, data centres, or large textiles factories. The goal is to achieve energy independence and ensure a secure power supply that is immune to the disruptions and fluctuations of the public grid power. At its core, captive power is about converting a fuel source into electricity locally. While technologies vary from solar power to steam turbines, the workhorse of industrial captive power is the reciprocating gas engine. The process is straightforward but critical. During combustion. fuel is burned in the engine cylinders to create mechanical energy. Then is the conversion when an alternator coupled to the engine converts this movement into electricity. And finally, the utilization, where this power is fed directly into the facility’s internal grid to meet energy needs. energy demands, captive power generation operates in two ways. One, grid-connected where the plant runs in parallel with the public grid. The grid acts as a battery – supplying extra power when required or absorbing excess power when the plant overproduces. In some regions, open access regulations even allow you to wheel this power to other locations. Two, the off-grid (island mode), where the facility is completely isolated. This is common in remote mining operations or regions with extremely unreliable infrastructure. Here, the captive plant is the only lifeline against outages, often supported by energy storage systems.

A Tatapower blog highlights that group captive solar is becoming a strategic lever for businesses managing rising power costs and sustainability mandates. Under India’s open access framework, it allows multiple companies to jointly invest in and consume clean energy, often delivering 20–40% savings compared to grid tariffs for commercial and industrial users. Beyond cost efficiency, the model offers long-term energy security, greater control over power expenses, an

The BW report adds that the shift is particularly pronounced in steel, cement and metals, where electricity is a significant operating expense and interruptions can affect production. Automakers and commercial real estate operators are also expanding their use of dedicated solar, wind and hybrid power projects as businesses seek greater control over energy procurement. The growing adoption of captive renewable energy reflects a wider change in corporate power purchasing, with cost competitiveness, energy security and emissions reduction increasingly influencing investment decisions. Companies are building their own generation capacity or partnering with renewable developers to supply electricity directly to their operations.

An analysis by climate.economictimes.indiatimes.com points out that India’s industrial electricity strategy is also undergoing a quiet but important shift. Instead of relying entirely on state grids, more companies are building or contracting renewable power for their own use, a move that is reshaping how factories, offices and business parks manage both cost and supply risk. The analysis also highlights that FinancialExpress.com reported that the trend is gathering pace across heavy industry and is now spreading into autos, commercial real estate and office campuses. At the centre of this change is a simple business calculation. Captive green power, whether through on-site generation or group-captive arrangements, gives large consumers a way to lock in electricity costs, reduce exposure to volatile spot markets and support decarbonisation targets at the same time. Industry sources cited in the report said the model has become more attractive as renewable tariffs have fallen and regulatory structures have become more supportive.