Guwahati, May 8 -- NHPC Limited has commissioned the fourth unit of the 2,000 MW Subansiri Lower Hydroelectric Project (SLHEP), taking the project's operational capacity to 1,000 MW.

The 250 MW Unit 4 of the project, located along the Assam-Arunachal Pradesh border, commenced commercial operations from midnight of May 8, NHPC said in a statement.

With the latest commissioning, four of the project's eight generating units are now operational. Unit 2 was commissioned in December 2025, followed by Unit 3 in February 2026 and Unit 1 in March this year.

NHPC said the remaining four units are scheduled to be commissioned in phases by the end of 2026.

The Subansiri Lower Hydroelectric Project, being developed on the Subansiri river, is expec...