Topaz Solar leads where India's bioenergy sector follows: Tamil Nadu's first Green Hydrogen project at Veppur, India's first weed-to-Bioethanol-cum-Bioplastics biorefinery at Thoothukudi, and the world-first Water Hyacinth BioCBG complex at Bokakhat — with four further locations planned across Assam. Guided by Chairman & Chief Mentor Ganesan Natarajan, Topaz Solar develops these projects on a commercial basis, but its mainspring is contribution to this country's sustainability: every plant removes a weed, a waste stream or an import bill from India's ledger.
Every flagship in the Topaz Solar portfolio sets a national benchmark — and one may set a global one.
The country's largest biogenic Green Hydrogen cum Cryogenic Dry Ice complex and India's first commercial-scale Green Hydrogen project — pairing 6.2 TPD of green hydrogen with 31.8 TPD of biogenic dry ice from a single integrated site.
The first large-scale plant anywhere in India to run a BioCBG cum Cryogenic Dry Ice complex on water hyacinth and bamboo as feedstock — processing 1,200 TPD of the invasive weed. At this magnitude, it is likely the largest plant in the world using water hyacinth as feedstock.
Yogan Sustainable Fuels converts Prosopis Juliflora (Seemai Karuvelam) — the invasive tree the Madras High Court has mandated for eradication — into fuel-grade Bioethanol, PLA Bioplastics, Cryogenic Dry Ice and Lignin Bio-Coal in one zero-waste ₹140 Cr complex delivering a 51.4% IRR.
Where the industry vents CO₂ separated during biogas upgrading, Topaz Solar captures it and converts it into marketable Cryogenic Dry Ice — turning an emission into a product for pharma, fisheries and food cold chains, and making every BioCBG plant carbon-smarter by design.
Innovation at Topaz Solar is less about adopting technology for its own sake and more about connecting processes that are traditionally treated separately. Integrated projects extract multiple forms of value from the same feedstock — a more circular, resource-efficient model where emissions become products.
"Topaz Solar was established with a clear vision of contributing to India's energy transformation through projects that are commercially sustainable, environmentally responsible and socially relevant."
— Ganesan Natarajan, Chairman, Topaz SolarA ₹1,453 Crore, five-project investment proposal has been submitted to the Hon'ble Chief Minister of Tamil Nadu and Guidance Tamil Nadu — spanning Biogas, Green Hydrogen, Cryogenic Dry Ice, CBG, Organic Bio-Fertilizers, Bioethanol and Bioplastics through dedicated SPVs across four strategic locations. In Assam, the Water Hyacinth BioCBG programme begins at Bokakhat and extends to four further locations. Commercial in structure; national sustainability in purpose.
India's first integrated Bioethanol–Bioplastics–Dry Ice biorefinery (Yogan Sustainable Fuels Pvt. Ltd., ₹140 Cr). Prosopis Juliflora — the invasive Seemai Karuvelam whose eradication the Madras High Court has mandated — becomes 10 TPD fuel-grade Bioethanol (IS 15464, supplied to OMCs), 10 TPD CIPET-certified PLA Bioplastics, 8.5 TPD Cryogenic Dry Ice for Thoothukudi's seafood export cold chains, and 13 TPD Lignin Bio-Coal powering the on-site 1.5 MW boiler. Five revenue lines, ₹98.16 Cr gross revenue, 51.4% IRR, 1.7-year payback, 68.1% EBITDA margin — NSE Emerge IPO ready. A weed the state pays to remove becomes an export industry beside India's second-largest container port.
Tamil Nadu's first — and India's largest biogenic — Green Hydrogen cum Cryogenic Dry Ice plant (₹343 Cr, two phases). Co-located with Thirumavadi Bioenergy for synergistic feedstock and shared infrastructure, fed by 500 acres of Giant King Napier Grass: 20 TPD Biogas, 6 TPD Green Hydrogen and 32 TPD Cryogenic Dry Ice, with offtake secured from Mega Engineering (methane LOI) and Sicgil (dry ice LOI + agreement). 150–180 direct jobs, and the CO₂-to-dry-ice capture that defines every Topaz Solar plant.
The world-first Water Hyacinth BioCBG cum Cryogenic Dry Ice complex (₹190 Cr) — and likely the largest plant anywhere on this feedstock. 1,200 TPD of the invasive weed plus bamboo becomes CBG, dry ice, FOM and LFOM alongside Numaligarh Refinery, restoring the Kaziranga buffer beels and 17,500 fishing livelihoods. Bokakhat is the anchor: the programme extends to four further locations across Assam, on the path to a 50-unit statewide replication.
Integrated Biogas + Green Hydrogen + Dry Ice facility — 20 TPD biogas, 6 TPD GH₂, 32 TPD dry ice on 500 acres of Napier Grass. Phase 1 ₹171 Cr, Phase 2 ₹172 Cr. 150–180 direct jobs.
MNRE 'Flagship Project' — 13.2 TPD biogas, 3.2 TPD GH₂ (Phase 2), 24 TPD dry ice from 500 acres of self-cultivated Napier Grass. AIG Direct LLC (USA) Term Sheet signed for the full two phases; dual offtake with Sicgil and Mega Engineering. Phase 1 ₹162 Cr, Phase 2 ₹130 Cr.
Adjacent to the 648 MW Kamudhi Solar Park — captive solar at ₹2.0–2.5/kWh powers 15 TPD CBG, 4 TPD GH₂ (Phase 2) and 28 TPD dry ice, with hydrogen export access via Tuticorin Port (~80 km). When operational, the largest integrated biogas-to-hydrogen-to-dry-ice facility in India. 180–220 direct jobs.
Yogan Bio-Fertilizers Pvt. Ltd. — 260 TPD certified Organic DAP plus 2,00,000 bottles of Nano Chelated Organic Liquid Urea. Substitutes ₹550 Cr/year in chemical DAP imports, saves the Government ₹237–285 Cr/year in NBS subsidies, and serves 60 lakh+ Tamil Nadu farming households. 300–350 direct jobs.
The weed-to-Bioethanol-cum-Bioplastics biorefinery spotlighted above — Prosopis Juliflora at ₹6,500/MT into four product lines on a 5-acre SIPCOT Phase II plot, with pipeline access to the 60 MLD Mullakadu Desalination Plant and VO Chidambaranar Port at its doorstep. 58 plant + 130 harvesting jobs.
The anchor plant — 1,200 TPD water hyacinth + bamboo into four LOI-backed streams (₹199.98 Cr/yr), presented to the Hon'ble Chief Minister of Assam and developed alongside NRL. Four further Assam locations follow in the Bio Refinery initiative, funded from project accruals toward a 50-unit statewide replication — the path to India's first carbon-positive state.
Yogan Sustainable Fuels will extend Second-Generation cellulosic bioethanol (50–100 KLPD, scalable to 200 KLPD) across the Napier Grass clusters — guaranteed OMC offtake at ₹65.61/litre under the Ethanol Blending Programme, eligible for ₹150 Cr capital subsidy under PM JI-VAN Yojana, replacing imported petrol litre for litre.
The Union Cabinet's approval of the scheme in August 2026 provides a significant policy push to India's circular bioenergy ecosystem — and it closely complements projects Topaz Solar already has under development.
"The company's focus on agricultural residue and invasive biomass also strengthens its alignment with India's broader self-reliance objectives by developing domestic alternatives to imported energy resources and equipment."
— Ganesan Natarajan, Chairman, Topaz SolarThe ₹1,453 Crore five-project Tamil Nadu investment proposal has been submitted to the Hon'ble Chief Minister of Tamil Nadu and the senior officials of Guidance Tamil Nadu, while the Bokakhat proposal has been presented to the Hon'ble Chief Minister of Assam.
Industry Outlook names Topaz Solar Company of the Year — Renewable Energy Solutions 2026, profiling the company as "Building the Next Chapter of India's Circular Energy Economy."
— Industry Outlook, 2026 featureOwn 250+ acres? Grow Giant King Napier Grass — and become a partner in a BioCBG plant, anywhere in India.
Topaz Solar invites landowners with 250 acres or more willing to cultivate Giant King Napier Grass as energy feedstock into partnership in a BioCBG plant. Napier is a high-yield perennial — plant once, harvest for years — with assured offtake under GOBARdhan's administered CBG price and CGD networks. You bring the acreage; we bring project development, technology, offtake and policy support.
Register your interestPartner with us on CBG, Green Hydrogen and circular bioenergy projects across Tamil Nadu and Assam — as an offtaker, technology partner, lender or investor.