Illumine-i | Solar, BESS & Grid Engineering Services Illumine-i | Solar, BESS & Grid Engineering Services

Illumine-i | Solar, BESS & Grid Engineering Services

Renewable Energy

Sustainable Development Goals

SDG 13 – Climate Action, SDG 7 – Affordable and Clean Energy, SDG 9 – Industry Innovation and Infrastructure

Company Overview

Illumine-i is a power and design engineering firm founded in 2015 by Nithish Sairam and Sudarsan Krishnan, both former employees of Tesla, Sunrun and NextEra Energy. The company is headquartered in Austin, Texas, with a delivery office in Chennai, India, and employs more than 220 engineers and technical staff across both locations.

Illumine-i provides engineering, design and consulting services that cover the full lifecycle of clean energy infrastructure. Its scope spans utility, community, and commercial and industrial solar photovoltaic systems, battery energy storage systems, microgrids, electric vehicle charging stations, and transmission and distribution substations. The firm also conducts power system studies, including short circuit, arc flash, load flow and protection coordination analysis, and offers independent engineering, owner’s engineering and development consulting services to lenders, developers, independent power producers and asset owners.

Since its founding, Illumine-i has grown from a five-person team designing low voltage power plants into a firm that has engineered more than 3 gigawatts of clean energy capacity and supported over 200,000 solar, storage and EV charging projects. The company also extends digital modeling, MEP engineering and project management services to the architecture, engineering and construction sector, with a portfolio of more than 30 million square feet of building projects.

Illumine-i has built a suite of proprietary digital tools to support its engineering delivery, including a client project management portal, a mobile field survey application, an automated EV charging proposal generator, and AI-based tools for construction document extraction and electrical panel scheduling. In February 2024, the company raised USD 2 million in a Series A funding round led by Anicut Capital to support automation, digitization and expansion into new markets.

Why These SDGs Matter

Illumine-i selected three SDGs based on verifiable alignment with its core business activities. SDG 7, Affordable and Clean Energy, is directly supported through the company’s engineering design of solar photovoltaic, battery storage and EV charging infrastructure, which enables the deployment of renewable energy generation and supporting assets. SDG 9, Industry, Innovation and Infrastructure, applies because Illumine-i designs the substations, protection systems and grid delivery infrastructure that clean energy projects depend on, and because the firm has developed proprietary digital tools, including AI-based document processing and automated proposal software, to support infrastructure delivery. SDG 13, Climate Action, is relevant because the company’s engineering output, more than 3 gigawatts of clean energy capacity and over 200,000 solar, storage and EV charging projects, directly enables the construction of low-carbon energy infrastructure at scale.

Products & Services
  • Utility, community and C&I solar PV design engineering
  • Battery energy storage system (BESS) design and integration
  • Microgrid design for resilient, islanded operation
  • EV charging station (EVCS) design and engineering
  • Transmission and distribution substation design
  • Power system studies (short circuit, arc flash, load flow)
  • Protection, control and SCADA integration
  • Independent engineering for project lenders
  • Owner’s engineering and asset acquisition due diligence
  • BIM, MEP modeling and Scan-to-BIM services for AEC clients

Business Challenges Solved
  • Engineering bottlenecks slowing solar and storage project timelines
  • Lack of in-house technical capacity at smaller EPCs and developers
  • Interconnection and permitting delays from incomplete design packages
  • Absence of independent technical validation for project financing
  • Fragmented data collection during field surveys and site assessments
  • Manual, error-prone extraction of data from construction documents
  • Limited engineering support for battery storage fire code compliance
Approach & Methodology

Illumine-i organizes its delivery around discrete engineering service lines that follow a project from feasibility through construction and operation. Preliminary engineering covers feasibility studies, conceptual design and site assessments, while detailed engineering produces construction-ready drawings, single line diagrams, structural calculations, permit sets and interconnection packages. For financed projects, the firm offers independent engineering, providing third-party technical due diligence for lenders, and owner’s engineering, representing asset owners through acquisition due diligence and performance validation.

Technical work is grounded in established power engineering practice, including short circuit, arc flash, load flow and protection coordination studies, together with SCADA and protective relaying integration for generation and delivery infrastructure. Battery storage engineering incorporates compliance with NFPA 855 fire code requirements and includes fire suppression design alongside layout and performance modeling.

The firm has invested in proprietary software to support this engineering process. Its client portal manages projects from submission through delivery, a mobile application supports field data capture for site surveys, and separate AI-based tools handle automated EV charging proposal generation, construction document and bill-of-materials extraction, and electrical panel schedule automation. Illumine-i describes its operating philosophy around three principles: identifying and modeling problems before they surface on site, flagging issues even when inconvenient to project timelines, and remaining engaged with clients from feasibility through post-construction operational questions.

Market Position

Illumine-i operates in the power engineering and independent engineering segment of the clean energy market, serving solar and storage EPCs, project developers, independent power producers, lenders and asset owners across the United States and internationally. The company positions itself as a single engineering partner covering both power generation design, spanning solar, storage and EV charging, and power delivery engineering, spanning substations and protection systems, rather than specializing in one discipline. Client testimonials cited on the company’s website reference engagements with a top-ten United States solar EPC and an independent power producer, indicating the firm serves established, larger-scale industry participants alongside smaller developers. Its differentiation rests substantially on proprietary software tools built to support engineering delivery, including automated proposal generation and AI-based document processing, which the company positions as a complement to its engineering services rather than a standalone product line.

Procurement Considerations
  • Verify current professional engineering (PE) licensure of assigned staff by state/jurisdiction
  • Confirm NFPA 855 compliance track record for battery storage projects
  • Request project references for the specific service type needed (independent vs. owner’s engineering)
  • Clarify turnaround times for permit-ready and interconnection packages
  • Confirm data handling and IP terms for use of proprietary tools (e.g., SiteScribe, Endore AI)
  • Assess scalability of engineering capacity for multi-site or portfolio-level projects
  • Review contractual liability terms for engineering deliverables tied to financing timelines
Funding, Recognition & Ecosystem
  • Series A funding of USD 2 million (Rs 17 crore), led by Anicut Capital, February 2024
  • Selected among Forbes India & D Globalist’s “Select 200 Companies with Global Business Potential” at the D Globalist Entrepreneur Mobility Summit, 2023
Natnavi Analysis

Illumine-i occupies a specific niche within the clean energy services market: engineering and design support for solar, storage, EV charging and grid delivery infrastructure, rather than project development, financing or equipment manufacturing itself. This positioning matters because engineering quality upstream, in permitting, interconnection and structural design, materially affects downstream project cost, timeline and reliability, and specialized engineering firms have become a distinct category within the broader clean energy supply chain as project volumes have scaled.

The company’s decade of operating history, its expansion from residential solar design into utility-scale generation, battery storage, EV charging and substation engineering, and its Series A funding from Anicut Capital in 2024 point to a firm that has grown alongside the market it serves. Its investment in proprietary digital tools, spanning project management, field survey and AI-based document processing, suggests an attempt to differentiate through technology rather than price alone, and reflects a broader trend of engineering firms building software to scale delivery capacity.

Procurement teams should weigh Illumine-i’s stated project volumes and capacity figures, drawn primarily from company-published sources, against project-specific references and current documentation obtained directly from the firm during vendor evaluation. As a privately held company, much of its performance and client data is not independently audited, which is typical for firms of its size and stage.

Sources & References
Website
Founded: 2015
Company Stage: Growth-Stage Company
Headquarters
Austin, Texas, United States
Geographic Presence
Illumine-i delivers engineering and design services across the United States, Australia, the United Kingdom and the Middle East, supporting solar, storage, EV charging and substation projects for developers, EPCs and asset owners. Delivery is anchored by its Austin, Texas headquarters and Chennai, India engineering center, which together serve utility, commercial and residential clean energy markets internationally.
Solution Type
Consultancy, Service Provider, Technology Provider
Sustainability Outcomes
Carbon Reduction, Energy Efficiency, Renewable Energy Adoption, Sustainable Infrastructure, Transport Decarbonization
Industries Served
Automotive & Electric Mobility, Commercial Buildings, Construction & Real Estate, Energy & Utilities
Last Reviewed: August 20, 2026

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