IHI Terrasun Solutions

IHI Terrasun Solutions is a turnkey battery energy storage system (BESS) integrator and software provider for the utility-scale renewable energy sector in North America. The company designs, integrates, and services advanced energy storage projects including DC-coupled, collocated, and standalone battery storage installations. Its proprietary software suite includes Assured Controls, which features integrated Power Plant Controls (PPC) and Energy Management Systems (EMS) to optimize utility-scale battery and inverter operations. Through its Assured Procurement program, IHI Terrasun offers flexible battery procurement options, enabling clients to source equipment directly from leading tier-1 manufacturers while receiving engineering support. Comprehensive lifecycle field services encompass system commissioning, ongoing preventive maintenance, 24/7 remote monitoring, and on-site field repairs. The company serves solar and energy storage developers, independent power producers, and electric utilities seeking grid-scale storage integration. Headquartered in Chicago, Illinois, IHI Terrasun provides technology-agnostic integration and operational support across major energy markets.