India added 2.6 GW of solar open access capacity in the second quarter (Q2) of 2025, a nearly 143% increase from 1.1 GW in Q1 2025. Installations rose 60.1% year-over-year from over 1.7 GW, according to the Q2 2025 Mercom India Solar Open Access Market report. The rise in solar open access installations was due to developers moving swiftly to secure the waiver on the interstate transmission system charges before the June 2025 deadline. Several projects were partly commissioned to qualify for the benefit. Maharashtra, Karnataka, Rajasthan, Gujarat, and Tamil Nadu led solar open access installations in Q2 2025, contributing to slightly over 86% of the total.