On Thursday, June 25, 2026, Kolkata-based Jupiter International Limited officially scaled up its clean energy footprint by commissioning Unit IV at its centralized manufacturing campus in Baddi, Solan district, Himachal Pradesh.
Backed by a capital investment of ₹550 crore, this expansion directly addresses India’s acute domestic supply deficit for next-generation solar cells.
Project Blueprint & Capacity Leap
The rollout shifts Jupiter’s product mix away from legacy architectures, transitioning the Baddi hub into an advanced tech corridor:
- Capacity Injection: Adds 1.25 GW of high-efficiency TOPCon (Tunnel Oxide Passivated Contact) cell manufacturing capacity.
- Total Capacity Scale: Propels Jupiter’s cumulative operational cell capacity from 2 GW to 3.25 GW.
- Sequential Growth: This launch follows a fast-tracked timeline. Just months prior, the company commissioned its 1 GW mono-PERC line (Unit III, operated via its subsidiary Jupiter Solartech Pvt Ltd) at the same Katha village site, meaning the firm has effectively tripled its capacity within a brief multi-quarter window.
The Technology Paradigm: Why TOPCon Matters
Jupiter’s pivot to TOPCon lines up with a massive structural shift in Indian solar procurement. Large utility developers are rapidly moving away from traditional mono-PERC cells due to performance limitations
By embedding an ultra-thin tunnel oxide layer paired with highly doped polycrystalline silicon, TOPCon cells minimize internal electron recombination. For utility-scale project developers, this translates to a lower Levelized Cost of Electricity (LCOE) because the panels generate more power over a 25-year lifespan within the exact same land footprint.
The Strategic Horizon: The Nagpur “TopCon ++” Mega-Fab
Operationally, Jupiter is utilizing the Baddi Unit IV ramp-up as a real-world testing bed and training baseline for its upcoming crown jewel project:
“It provides a technology platform on which Jupiter is scaling up to build a 3 GW TopCon ++ performance fab to be commissioned in Nagpur at the end of the year.” — Dhruv Sharma, CEO, Jupiter International.
The upcoming 3 GW Nagpur mega-facility in Maharashtra will focus on an even more advanced iteration of cell architectures, helping position Jupiter as a prominent pure-play, domestic solar cell manufacturer capable of taking on integrated tech giants like Adani Solar and Reliance New Energy.