Rondo Energy and SCG Cleanergy have launched Southeast Asia’s first industrial heat battery at SCG’s cement plant in Saraburi Province, central Thailand. The 33 MWh Rondo Heat Battery (RHB33) on a new modular platform delivers 2.3 MWth of continuous high-pressure steam, charged from the grid and a nearby floating solar farm to drive a steam turbine for 24-hour clean electricity in cement production. The project received funding from Thailand’s Science, Research, and Innovation Promotion Fund via PMUC and was built entirely with local suppliers.
The system stores renewable electricity as heat up to 1,500°C in bricks, converting it to steam at 97 per cent efficiency for industrial use, exceeding cement kiln needs and enabling fossil fuel replacement. Rondo now offers units from 33 MWh to over 1 GWh, with this as the world’s first heat battery generating steam for real production power. SCG Cleanergy plans expansion to other ASEAN operations and clients by 2026 for commercial scale.
The deployment supports SCG’s Net Zero 2050 goals and regional industrial decarbonization in heat-intensive sectors like cement, chemicals, and textiles amid rapid growth.