Websol Energy System Limited is upgrading its 600 MW PERC solar cell manufacturing line to TOPCon technology, marking a significant step in its strategy to expand high-efficiency solar cell production in India.
The upgrade is expected to increase Websol’s total solar cell manufacturing capacity to 1.35 GW. The company is targeting cell efficiencies of more than 25% following the technology transition.
The brownfield upgrade involves an investment of approximately ₹270 crore and is targeted for completion by March 2027. Websol’s manufacturing facility is located at Falta SEZ, West Bengal.
The transition comes as India’s solar manufacturing sector increasingly shifts toward n-type TOPCon technology, which offers higher efficiency and improved performance compared with conventional PERC cells. Upgrading existing manufacturing infrastructure also enables manufacturers to adopt advanced technologies while leveraging established facilities.
Key Highlights
- Technology upgrade: 600 MW PERC line to TOPCon
- Total cell capacity: 1.35 GW after upgrade
- Investment: Approximately ₹270 crore
- Target efficiency: 25%+
- Completion target: March 2027
- Manufacturing facility: Falta SEZ, West Bengal
- Expansion type: Brownfield technology upgrade
Websol is also exploring greater upstream integration, including potential ingot and wafer manufacturing, as India works toward building a more integrated domestic solar manufacturing ecosystem.
The move highlights the evolving priorities of India’s solar manufacturing industry, where technology upgrades, higher efficiency and supply-chain integration are becoming increasingly important alongside capacity expansion.
