Websol Energy Systems has announced an expansion plan to add 4 GW of solar cell and 4 GW of solar module capacity.

The expansion will be carried out in two phases and will use tunnel oxide passivated contact (TOPCon)  technology. Phase III will add 2 GW of solar cell and 2 GW of solar module capacity by June 2027. Phase IV will add another 2 GW of solar cell and 2 GW of solar module capacity by June 2028.

The combined investment of ₹30 billion (~$340.73 million) for this expansion will be funded through internal accruals and institutional lending.

This expansion builds on Websol’s existing manufacturing base at Falta, West Bengal, where it currently operates a 600 MW solar cell line and a 550 MW solar module line under Phase I. The solar cell line is operating at an effective capacity utilisation of 90%. These facilities were financed through a combination of internal accruals, preferential equity issuance, and loans from financial institutions.

Websol is also on track to commission an additional 600 MW solar cell line (Phase II) at the same location by October 2025. Fully funded through internal accruals, this addition will take Websol’s total solar cell capacity to 1.2 GW.

India added 25.3 GW of solar module capacity and 11.6 GW of solar cell capacity in 2024, according to Mercom’s State of Solar PV Manufacturing in India 2025 report.

The manufacturing capacity additions in 2024 were primarily driven by demand from the solar project pipeline and the reimposition of the Approved List of Models and Manufacturers order from April 2024.

Based on the current pipeline, monocrystalline modules are anticipated to account for over 58% of the annual module production capacity and 64% of the cell production capacity by 2027, followed by TOPCon, Heterojunction, and other technologies.