Star Energy Geothermal, a subsidiary of Barito Renewables, is powering up Indonesia’s energy transition with a major milestone—the successful testing of the Salak Binary Geothermal Power Plant (PLTP) in the Gunung Salak geothermal field. From February 3 to 6, 2025, the plant underwent a rigorous 72-hour Unit Rated Capacity (URC) test, proving its readiness to contribute to the nation’s renewable energy goals. Just days later, on February 8, 2025, the Indonesian government granted its official Operation Feasibility Certificate (SLO), giving the green light for full-scale operation.

What sets the Salak Binary PLTP apart is its innovative binary cycle technology, which taps into Hot Brine—a geothermal byproduct previously reinjected into wells—as an extra source of electricity. By channeling 170°C Hot Brine through a heat exchanger, the system drives a turbine and generator, delivering clean energy straight to PLN’s power grid.

Launched in June 2021, the Salak Binary Project took off with an EPC contract awarded to a consortium of PT Tripatra Engineers and Constructors and Ormat Pacific Inc. Despite pandemic-era challenges, the team delivered beyond expectations—completing the project with zero fatalities and even surpassing its initial power target. Instead of the planned 14.3 MW, the plant achieved a gross capacity of 16.6 MW, reinforcing Star Energy Geothermal’s position as a leader in sustainable power.

With this achievement, Star Energy Geothermal moves one step closer to its ambitious 1,900 MW geothermal management target by 2032. The company celebrates this milestone as a testament to its commitment to innovation, sustainability, and Indonesia’s green energy future.