What IHI Terrasun Solutions does

IHI Terrasun Solutions is a Chicago-headquartered, private BESS systems integrator and lifecycle services provider operating as a wholly owned subsidiary of Japan's IHI Corporation (founded 1853, 29,149 global employees). The company integrates utility-scale battery energy storage projects across DC-coupled, collocated (AC-coupled), and standalone configurations for solar and storage developers, independent power producers, utilities, and — via channel partners — commercial and industrial customers in US ISO markets and Ontario, Canada. Its core technology is the Assured Controls power plant controller (proprietary algorithms for battery and inverter orchestration) layered on the ESWare software suite acquired from 24M in 2015, comprising ES/Analyzer (pre-sale analytics), ES/Optimizer (runtime dispatch optimization), ES/Pilot (web-based controls), and ES/Forecaster (neural-network peak prediction for Ontario's Global Adjustment market). Assured Procurement offers technology-agnostic battery sourcing across multiple vendors (Samsung SDI, LG Chem, SK Innovations) and chemistries (LFP, NMC).

The business model is a hybrid of project-based hardware integration, recurring software subscriptions (ES/Analyzer Basic at $1,500/year, Premium at $7,500/year), and multi-year managed services for operations, maintenance, capacity guarantees, and remote software upgrades. Revenue is generated primarily through direct enterprise sales to large project developers (e.g., Primergy on Gemini, 380 MW / 1,406 MWh; GlidePath on Byrd Ranch, 60 MW / 60 MWh; Nexamp on 51 MWh of DC-coupled systems) and channel partnerships (Convergent Energy + Power, NRStor C&I, Borrego Solar) that originate projects in exchange for IHI Terrasun's hardware, software, and lifecycle services. The 5.7 GWh portfolio across 68 projects, UL9540A-compliant system design, and IHI Corporation's bankability position the company as a creditworthy integrator for large, financed solar-plus-storage assets, while the recurring O&M layer provides multi-year revenue visibility tied to project operating lifetimes.

Name

IHI Terrasun Solutions

Legal name

IHI Terrasun Solutions, Inc.

Website

https://ihiterrasun.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Short description

IHI Terrasun Solutions is a Chicago-based BESS systems integrator and lifecycle services provider serving US and Ontario solar/storage developers, IPPs, and utilities with proprietary Assured Controls PPC software, the ESWare analytics suite, and multi-year O&M.

Ownership category

akta.pro rank

Product category

Battery Energy Storage Integration

akta.pro primary industry

Utility-Scale BESS EPC & Integration (EUAEAEAA)

akta.pro secondary industries

BESS Operations, Maintenance & Asset Performance Management (APM) (EUAFAAAG), BESS OEMs (Containerized Systems, Racks, Turnkey Solutions) (EUAFAAAC), BESS Grid Interconnection, System Studies & Grid Code Compliance (EUAFAAAJ), BESS Market Participation & Trading Services (Ancillary/Capacity/Arbitrage) (EUAFAAAL)

Keywords

• Battery energy storage
• Solar storage integration
• Power plant controls
• Grid-scale storage services
• Energy storage lifecycle

Headquarters

HQ city

Chicago

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. BESS Hardware and System Integration: IHI Terrasun provides complete turn-key energy storage systems including battery racks, bi-directional inverters, DC-DC converters, HVAC, temperature-controlled enclosures, balance of plant, and full system integration. This is a one-time hardware revenue stream tied to project commissioning.
2. Software Licensing and Subscriptions (ESWare Suite): The ESWare software suite is offered as a subscription with two tiers: Basic at $1,500/year (single license, tutorial videos, help desk) and Premium at $7,500/year (up to 5 licenses, analyst assistance, customer service). ES/Forecaster is also available as a subscription for peak prediction.
3. Operations and Maintenance (O&M) / Lifecycle Services: IHI Terrasun provides ongoing lifecycle services throughout the full duration of project operation, including remote monitoring, troubleshooting, diagnostic services, repair services, digital commissioning, field engineering, and performance guarantees. Services include capacity guarantees, augmentation, and remote software upgrades. Services are contract-based, typically multi-year.
4. Professional Services (Engineering, Commissioning, Consulting): Full design management, system engineering and integration, commissioning, reporting, and consulting services are provided across the project lifecycle. These are one-time or project-based service fees.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels7 records

Core offering

IHI Terrasun provides solar plus storage lifecycle services for utility-scale battery energy storage system (BESS) projects, including system design, hardware integration, proprietary software (Assured Controls platform and ESWare suite), operations and maintenance, and flexible battery procurement. The company is technology-agnostic, supporting multiple battery (LFP, NMC) and inverter vendors, and specializes in DC-coupled, AC-coupled collocated, and standalone battery storage configurations across North America.

Product overview

IHI Terrasun Solutions is a solar + storage lifecycle services provider offering a platform-plus-modules architecture. The core Assured Controls platform provides proprietary power plant controller functionality, supplemented by the ESWare software suite (ES/Analyzer, ES/Optimizer, ES/Pilot, ES/Forecaster) for planning, optimization, control, and forecasting. Services include Assured Procurement for flexible battery sourcing, Assured Services for O&M, Field Engineering Services for monitoring and maintenance, and System Integration Services for project delivery. The company serves utility-scale battery storage projects in North America with DC-coupled, collocated, and standalone configurations.

Differentiator

Problem solved

Functional benefit

Brands

• Assured Controls: Power plant control software platform for managing battery and inverter operations over system lifetime.
• Assured Procurement
• Assured Services
• Assured Insights
• ESWare

Products and services

• Assured Controls
• ESWare Software Suite
• ES/Analyzer
• ES/Forecaster
• Assured Procurement
• Assured Services
• Field Engineering Services
• System Integration Services

Quantifiable outcome

• 100% peak day prediction accuracy using ES/Forecaster neural network (26 days per year of operation, back tested from 2007 to present)
• +5 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability5 records

Feature6 records

Partnerships

Eight partnerships are on record, tiered core.

• IHI Corporation (Parent)coreOthers · 19 August 2020IHI Corporation (Tokyo, Japan) is the parent company of IHI Terrasun Solutions. IHI Terrasun is a wholly owned subsidiary of IHI Americas Inc. (IAI). IHI Corporation has 170+ years of history since 1853, 29,149 global employees, and 206 offices worldwide. Provides bankability, financial support, and strategic guidance to IHI Terrasun. Parent company expertise in energy management and power controls complements IHI Terrasun's BESS integration capabilities.
• NexampcoreChannel Partner/ Reseller/ Distributor · 18 September 2019IHI Energy Storage contracted by Nexamp to provide energy storage technology for 6 DC-coupled solar + storage systems totaling 51MWh across Massachusetts and New York. Projects under NY SUN, VDER, and MA SMART programs. Nexamp is a solar developer expanding into energy storage.
• Convergent Energy + PowercoreChannel Partner/ Reseller/ Distributor · 15 August 2018Convergent commissioned North America's largest behind-the-meter energy storage system (10MW/20MWh in Sarnia, Ontario) with IHI providing hardware and software. IHI also provides operations and maintenance services and capacity guarantee. This marked IHI's entry into Ontario market with another 21MW contracted in the region.
• NRStor C&I L.P.coreStrategic or Co-development Partner · 8 June 2018MOU signed June 8, 2018 for IHI Energy Storage to deliver 42MWh of behind-the-meter Lithium-ion battery solutions for 8 commercial and industrial customers in Ontario, Canada. IHI delivers battery, inverter, ESWare software, enclosure, balance of plant, and full wrap including warranty and O&M. Projects expected operational in 2019.
• Borrego SolarcoreChannel Partner/ Reseller/ Distributor · 21 February 2018IHI Energy Storage partnered with Borrego Solar to implement a 2MW/4MWh storage system for Braintree Electric Light Department (BELD) with MassCEC ACES grant. Borrego Solar acted as developer/EPC. IHI provided hardware and ESWare software. Partnership has grown to over 150MWh of collaborative projects across Massachusetts.
• Tucson Electric Power (TEP)coreStrategic or Co-development Partner · 23 January 2017Joint research program announced January 23, 2017 between IHI Inc. Energy Storage and TEP to study and research battery energy storage systems for the electric grid. IHI provided a 1MW/1MWh ESS operated using ESWare software at TEP's solar array site. TEP provided site and interconnection. Focused on grid and feeder reliability in southern Arizona microclimate.
• SK InnovationscoreTechnology or IntegrationIHI Terrasun Solutions executed an MOU with SK Innovations to include SK batteries in its integration portfolio, expanding battery procurement options beyond Samsung SDI and LG Chem.
• Primergy SolarcoreChannel Partner/ Reseller/ DistributorPrimergy Solar is the developer and partner for the Gemini Solar + Storage project (380 MW/1,406 MWh) in Nevada. IHI Terrasun provides full BESS integration, power plant controls, commissioning, and maintenance services for this flagship project.

Scale indicators9 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Fluence Energy: Fluence is the most direct comparable: a global BESS integrator and software provider serving IPPs, utilities, and developers with turnkey systems (Gridstack, Cubex), the Fluence Mosaic platform, and lifecycle services. Operates in the same US ISO markets and Ontario with comparable scale and customer types.
• Tesla Energy (Megapack): Tesla's Megapack business competes head-to-head with IHI Terrasun in utility-scale front-of-meter BESS, offering vertically integrated hardware, software (Autobidder/Opticaster), and services. Largest by deployed volume in North America; key threat as a vertically integrated competitor.
• Wärtsilä Energy Storage: Wärtsilä's GridSolv Quantum product line competes in utility-scale BESS integration with full EPC and lifecycle services capabilities. Comparable hardware-agnostic integration approach and similar IPP/utility customer base in North America.
• Sungrow: Sungrow is a leading global BESS and PV inverter supplier expanding aggressively into utility-scale storage integration in North America. Competes on integrated hardware/software value proposition similar to IHI Terrasun's approach.
• Powin Energy: Powin is a US-based BESS integrator (Centipede platform) with comparable focus on utility-scale deployments, multi-vendor battery support, and software-driven lifecycle services. Direct competitor on IPP and utility tenders.
• Saft (TotalEnergies): Saft, the battery subsidiary of TotalEnergies, delivers BESS systems and integration services globally with a similar long-duration storage focus. Comparable in targeting utility and C&I customers with full lifecycle offerings.
• e-STORAGE (Canadian Solar subsidiary): e-STORAGE is Canadian Solar's BESS subsidiary offering turnkey utility-scale storage solutions. Competitor in the same North American market segments (developers, IPPs, utilities) with comparable turnkey value proposition.

Broad incumbents

• Nidec ASI: Nidec ASI delivers large-scale power conversion and energy storage solutions as part of a broader industrial motor/power electronics portfolio. Comparable utility-scale integration capabilities but bundled within a wider incumbent offering.
• GE Vernova: GE Vernova's GridOS and BESS offerings overlap with IHI Terrasun in the utility-scale storage integration space. Larger incumbent with broader portfolio of generation, grid, and storage solutions targeting similar utility customers.

Emerging players

• Stem Inc: Stem is a software-focused energy storage player (Athena platform) competing for the C&I and IPP software/optimization layer that overlaps with IHI Terrasun's ESWare suite. Adjacent competitor at the controls/optimization software layer rather than the hardware integration layer.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ihienergystorage

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about IHI Terrasun Solutions