Overview
IHI Terrasun Solutions provides end-to-end battery energy storage systems (BESS) and solar-plus-storage solutions for utilities, renewable developers, and grid operators across North America. Its approach combines engineering and system integration with proprietary software, long-term service agreements, and unique procurement capabilities to deliver lifecycle services from deployment to ongoing operation. Core offerings include Assured Controls™, a software platform that manages batteries and inverters and enables grid functions, and Assured Procurement™, which streamlines direct battery procurement to reduce costs and risk. The company differentiates itself as a technology-agnostic system integrator that integrates hardware, software, and services to optimize performance, cost, and grid services over the life of a project.
Work here?Claim your company
Simplify's Take
What believers are saying
- Terrasun launched a remote monitoring and diagnostics center, strengthening recurring service revenue.
- Assured Controls and Assured Insights target higher-margin software attach across installed BESS fleets.
- The 2026 Gemini commissioning strengthens references for ERCOT, PJM, and utility procurement cycles.
What critics are saying
- Terrasun's small headcount profile limits execution capacity against larger integrators like Fluence and Wärtsilä.
- Single-project concentration around Gemini exposes revenue and reputation if contract renewals stall in 2026.
- Battery warranty failures or controls bugs at remote sites can trigger costly claims and lost trust.
What makes IHI Terrasun Solutions unique
- IHI Terrasun pairs Assured Controls software with multi-OEM BESS integration and lifecycle services.
- Gemini Solar+Storage commissioning proved North American scale with 1.4 GWh delivered in Nevada.
- Kenshi Suzuki, from IHI Corporation, anchors Japanese industrial backing for North American execution.
Help us improve and share your feedback! Did you find this helpful?