We transform potential into performance through innovative energy solutions — thermoelectric generation, green hydrogen and circular battery storage — deployed at gigawatt scale across Southeast Asia.
BIG GAIN GROUP (BGG) is a clean energy technology commercialisation platform based in Bangkok, Thailand. We identify, integrate, and deploy the world's best energy technologies through exclusive partnerships with leading R&D and manufacturing specialists.
Our portfolio spans thermoelectric power generation, green hydrogen production and storage, and advanced battery energy storage — deployed through long-term project agreements with Thailand's most demanding industrial and strategic energy customers.
BGG commercialises technologies developed and manufactured by exclusive partner Phacharasin Group. Every technology has been field-tested before industrial-scale deployment.
Solid-state conversion of thermal differentials to electricity. H₂/LPG burner → chiller → TEG stack → DC/AC output. Silent, continuous, maintenance-minimal baseload power.
Circular BESS using regenerated lead-acid and NiCd batteries. BRS units restore batteries to ≥80% SoH at 40–60% below new battery cost.
End-to-end hydrogen ecosystem: electrolyzers for green H₂, FRP composite storage cylinders (patent-protected), and HHO hybrid assist for industrial vehicles.
Converting industrial waste heat at 200–500°C to electricity via TEG modules. No additional fuel. Pure efficiency extraction from existing industrial processes.
Solar-powered electrolysis for green hydrogen production combined with BESS buffering — delivering CBAM-compliant, carbon-free 24/7 baseload at industrial scale.
AI-managed dispatch across TEG, H₂ and BESS. Real-time optimisation of generation and storage. Predictive maintenance reduces downtime and extends system life.
The TEG system converts temperature differences into electricity using the Seebeck effect — no turbines, no combustion engines, no moving parts. The result is silent, continuous, maintenance-minimal baseload power that operates independently of weather conditions.
Hydrogen or LPG creates the heat source. Hydrogen combustion produces only water vapour; zero CO₂ at point of use. LPG serves as the transition-period fallback fuel.
A chiller maintains the cold side of the TEG stack at 0°C to −15°C. The temperature differential (ΔT) across the stack is the primary driver of electricity generation.
Solid-state thermoelectric cells convert ΔT directly to DC electricity. Zero moving parts. Zero combustion. Phacharasin cell range: 200–500°C operating temperature.
DC converted to AC at 10 kW per module. Modular stacking: 10 units = 100 kW; 50 units = 500 kW. AI system optimises dispatch and load balancing in real time.
Patent · Utility Model 16100661
BGG's hydrogen technology portfolio covers the entire value chain — from green H₂ production via electrolysis, through safe high-pressure composite storage, to delivery as a clean fuel for TEG modules and industrial vehicles.
Low-energy water electrolysis. Modular (lab bench), containerised, and industrial-scale configurations. Field-tested at multiple power levels. Integrated gas purification.
Fiber-reinforced polymer composite cylinders for LPG and hydrogen. 50–70% lighter than steel. Corrosion-free. Explosion-resistant. No-weld thread technology.
Patent — Utility Model 16100661Hydrogen injection into diesel/petrol engines. 40–60% fuel saving verified in field trials. Reduces CO₂ and black smoke. Compatible with trucks, buses, industrial machinery.
Battery Regeneration Systems restore end-of-life batteries to ≥80% SoH at 40–60% below new battery cost — creating a structural cost advantage that compounds at scale, while diverting tonnes of battery waste from landfill each year.
BGG's BESS strategy sources degraded batteries from Thailand's largest utility and telecom operators, regenerates them, and deploys them as grid-scale storage — circular economy that is both cost-efficient and environmentally superior to new battery procurement.
Circular Economy · 40–60% Cost Saving
Exclusive Technology Partner
Phacharasin Group develops, patents and manufactures all core clean energy technologies that BGG commercialises at gigawatt scale. The partnership combines Phacharasin's engineering depth with BGG's commercial execution capability.
Patented fiber-reinforced polymer cylinders. 50–70% lighter, corrosion-free, explosion-resistant.
Utility Model 16100661Low-energy H₂ production and 200–500°C TEG cells. R&D advancing to full production for BGG Phase 1 (Q3 2026).
Proprietary DesignClean energy is not a future aspiration — it is deployable technology, available today, at the scale the world requires.BIG GAIN GROUP · Engineering the World's Energy Future
Whether you are a prospective energy customer, technology collaborator, investor, or government agency, we welcome discussions at every stage. Detailed technical documentation and Company Profile available under NDA on request.