RenewSys signs 1.2 GW supply deal with Kosol Energie for solar materials

RenewSys India Pvt. Ltd. has entered into a 1.2 GW supply contract with Kosol Energie Pvt. Ltd., which includes the delivery of photovoltaic encapsulants and backsheets. The deal is set to run for 12 months, spanning October 2026 through September 2027, and represents a continuation of the business relationship between these two entities.

Deal specifics

Kosol Energie will receive CONSERV POE encapsulants and PRESERV backsheets from RenewSys under a twelve-month agreement spanning October 2026 through September 2027. The contract covers 1.2 GW of materials, succeeding an earlier deal for 1.1 GW of POE encapsulants that ran from December 2025 to September 2026. These components, manufactured in Gujarat, are designed to support the manufacturing of n-type TOPCon solar modules.

[Background] In a separate development, JinkoSolar announced on 19 October 2026 that its back-contact TOPCon cells achieve efficiencies exceeding 27%, as detailed in an earlier report.

Executive comments

Avinash Hiranandani, Vice Chairman and Managing Director of RenewSys, stated that the enlarged order and the inclusion of backsheets demonstrate the firm’s manufacturing capacity and product standards. Kalpesh Kalthia, Chairman and Managing Director of Kosol Energie, noted that RenewSys' POE encapsulants offer reliable supply and steady quality, which encouraged the firm to continue its collaboration.

In another move, Shakti Pumps (India) Ltd introduced a 620 Wp TOPCon module with a 16-busbar configuration at the REI Expo 2026 on 27 October 2026, as noted in a previous article. The closing date for final submissions for the SURYA Gujarat residential solar program was 8 December 2023, per Luminity's guide.

Market drivers

• ALMM, PLI scheme, and growth in utility-scale, C&I, and rooftop solar drive demand for domestic components.
• Domestic sourcing aims to reduce import dependence, shorten lead times, and maintain quality.
• As of 29 October 2026, TOPCon module benchmark prices stood at $0.107/W, with M10 cells at $0.0463/W and 210R cells at $0.0454/W.
• RenewSys India’s CONSERV POE encapsulants are UL certified for use with TOPCon cells, as reported by pv magazine India on 2 November 2026.

Product specifications and manufacturing integration

RenewSys details that its CONSERV POE encapsulants feature high volume resistivity, minimal water absorption, and protection against potential-induced degradation (PID). Its PRESERV backsheets are designed to provide moisture barriers and electrical insulation, ensuring module longevity in India’s operational environment. Kosol Energie plans to implement these inputs at its fully automated plant in Gujarat to manufacture its glass-to-backsheet modules. Kalpesh Kalthia, Chairman and Managing Director of Kosol Energie, highlighted that procuring backsheets from this local vendor secures a single partner for two essential module parts as the firm expands its TOPCon production capabilities.

What to watch

The next regulatory milestone is the implementation of ALMM List-III for ingots and wafers, which takes effect on 1 June 2028. This rule, detailed in Luminity's ALMM guide, extends domestic sourcing requirements further up the solar value chain. Rooftop installations under the PM Surya Ghar subsidy must continue to use modules manufactured in India from Indian cells, a constraint that sustains demand for locally produced components like encapsulants and backsheets.

On the technology front, JinkoSolar has plans to introduce copper-containing contact materials to replace silver in its back-contact TOPCon cell design.

Additional reporting: pv magazine India.