About Us

IHI Terrasun Solutions is a subsidiary of IHI Corporation, a 165-year-old organization with deep energy industry experience. IHI Terrasun Solutions is a solar + storage systems integration and lifecycle services provider with highly integrated hardware and software capabilities.

The robust software and top tier energy storage solutions are developed by the expert team at IHI Terrasun Solutions. Employees have extensive industry knowledge and experience, and enthusiastically seek to build on IHI’s advanced product offerings. 

To design systems, IHI Terrasun Solutions uses proprietary software that operates on the same algorithm later used to deploy the system in real-time. This end-to-end algorithm structure coupled with the support offered by a well-established parent organization enables IHI Terrasun Solutions to provide an advanced warranty to customers, reducing project risk and increasing clarity on system scheduling and deployment. 

With solar + storage expertise, robust service offerings, and technology-agnostic solutions, IHI Terrasun Solutions develops efficient and streamlined systems to achieve your energy storage goals. 


IHI Corporation has been a leader in the industrial sector since 1853.

Originally established as Ishikawajima Shipyard, IHI has expanded into various spheres of industry such as energy & environment, industrial systems, aero & space engines, and social infrastructure. IHI’s global history, experience, and expertise provides bankability and support to its various subsidiaries and sister companies. All of IHI’s subsidiaries work under the corporate message of “Realize your dreams,” describing IHI’s mission to help bring society to new levels of technological advancement. 

In 1977, IHI Corporation developed an American branch which provides support to all US subsidiaries and divisions of IHI Corporation, including IHI Terrasun Solutions.

IHI Terrasun Solutions was established in 2014. The group was positioned to develop software and provide energy storage products and services utilizing the software. In an effort to develop advanced optimization capabilities, IHI Terrasun Solutions purchased the ESWare software suite from 24M – an advanced, non-linear, economic algorithm-based software.

In March 2020, IHI Energy Storage, a division of the US-based headquarters of IHI Corporation, incorporated as IHI Terrasun Solutions, a wholly owned subsidiary of the US-based headquarters of IHI Corporation. The company incorporated after meeting several internal milestones and is now known as Terrasun, a solar + storage lifecycle services provider.

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