Two construction workers in safety vests and helmets reviewing a tablet at an energy storage site.

A large solar and energy storage project with rows of solar panels and battery containers under a partly cloudy sky at sunset.

Two engineers in safety gear checking electrical equipment outdoors with a digital clamp meter.

Energy Storage Projects with IHI Terrasun

Software and Services for Energy Storage Performance

High reliability energy storage software and solutions that capture value and reduce operational risk

Flexible Solutions for Energy Storage Projects

High availability energy storage system solutions that capture market value and reduce operational risk

Power Plant Control (PPC) and Energy Management System (EMS) software delivering stable, grid compliant, real-time control of battery energy storage and solar power plants.

System integration of battery DC blocks, Power Conversion Systems (PCS), and plant controls using exceptional depth of experience with battery, inverter and project execution experience bringing projects online.

Assured Design provides expert, front end engineering support to help energy storage developers make the right technical and commercial decisions early in the project lifecycle.

Assured Services combines US‑based technicians with experience across multiple OEM battery and PCS products providing the industry’s safest field support for energy storage projects.

Assured Controls: PPC + EMS software for energy storage and solar power plants

Assured Controls coordinates active and reactive power, dispatch logic, and safe operating limits for batteries to ensure predictable and reliable system performance with >99.5% uptime.

Grid‑Code‑Ready Control__ real‑time active and reactive power control built to meet ISO, RTO, and utility requirements.

Multi‑OEM Interoperability__ a flexible controls architecture that works seamlessly across battery and inverter platforms.

Optimized Dispatch Performance__ precise limit management and dispatch logic that maximizes usable energy and plant efficiency.

Pre‑Deployment Controls Validation__ simulated operating scenarios confirm controls performance before energization

Request a demo of our power plant controls software

Connect with us

Assured Integration: Commissioning and Execution That Makes BESS Work

IHI Terrasun’s integration services turn design intent into predictable plant behavior bringing complex, multi‑OEM systems online safely, efficiently, and ready for commercial operation.

Faster, Lower‑Risk COD

Proven commissioning discipline identifies and resolves controls, communications, and configuration issues early reducing rework and schedule risk.

Multi‑OEM Systems That Operate as One

Seamless interoperability across batteries, inverters, BMS, SCADA, and networking ensures stable, coordinated plant operation.

Verified System Behavior at Energization

End‑to‑end validation of control modes, limits, and operating scenarios confirms the plant behaves exactly as engineered.

Foundation for Long‑Term Performance

Clean handoff from commissioning to operations ensures system availability.

IHI Terrasun provides comprehensive services for energy storage projects

Cycle graphic showing contracting, quality assurance, logistics, project management, installation, and commissioning steps for energy storage projects

Learn More

Assured Design

Reduce BESS project risk

Assured Design helps energy storage developers select, pair, and configure battery and inverter technologies with confidence, reducing technical project risk while maximizing system performance and long‑term flexibility.

Efficient Design matters:

Battery and Inverter OEM Selection
Independent evaluation of battery and inverter OEMs based on operating characteristics, grid requirements, thermal limits, and lifecycle considerations so equipment choices match project requirements.
Optimized Battery–Inverter Pairing
‍Engineering‑driven pairing of DC and AC equipment to balance efficiency, ramp rates, clipping behavior, and control responsiveness across operating modes.
Performance and Compliance by Design
Controls architecture, operating envelopes, and grid‑code requirements are incorporated upfront, avoiding late‑stage changes that can be costly.
Future‑Ready System Architecture
Design decisions account for augmentation paths, OEM flexibility, and evolving grid requirements, protecting optionality over the asset’s full lifecycle.

Assured Services

IHI Terrasun’s Assured Services provide operationalcontinuity, field expertise, and system insight BESS developers need to protect availability and reduce lifecycle risk after COD.

Preventive and Corrective Maintenance

Scheduled preventive maintenance and responsive corrective support for batteries, inverters, controls, networks, and site IT/OT infrastructure, performed by OEM‑trained IHI Terrasun field engineers.

Multi‑OEM Field Services and Troubleshooting

Onsite and remote troubleshooting across battery, PCS, controls, and networking systems, coordinating OEMs as needed to resolve issues efficiently and thoroughly.

Warranty Management and Diagnostics Support

Management of OEM warranty claims, including diagnostics, documentation, and coordination to accelerate repair or replacement timelines.

Operational Monitoring and Data Visibility

Asset monitoring, fault review, and performance reporting leveraging our in-house Assured Insights data and analytics platform to support faster issue resolution and informed asset manager decisions.

IT/OT - Controls, Network, and Cyber Infrastructure Support

Ongoing support for power plant controls, site networks, servers, and cybersecurity including patching, configuration management, and system health monitoring.

Pre-COD Commissioning‑to‑Operations Continuity

Commissioning embedded technicians for seamless transition from commissioning into long‑term operations with shared documentation, known system behavior, and a consistent engineering support team.

Get BESS Services