iSun Energy
iSun Energy is a NASDAQ-listed (ISUN) clean-energy infrastructure provider that develops and deploys commercial, industrial, and utility-scale solar energy systems and smart-city e-mobility hubs, headquartered in Williston, United States, founded in 2011.
- Company typePublic
- Founded2011
- HeadquartersWilliston, United States
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
What iSun Energy does
iSun Energy (legal name: iSun Inc.) is a publicly traded, NASDAQ-listed (ticker: ISUN) clean-energy infrastructure company founded in 2011 and headquartered in Williston, United States. The firm develops and deploys solar energy systems alongside smart-city e-mobility hubs, positioning itself across commercial, industrial, and utility-scale clean-energy projects. Its operational focus spans solar EPC (engineering, procurement, and construction) delivery and the rollout of EV-charging infrastructure intended to support municipal and commercial smart-city initiatives.
The company operates with 251–500 employees and has scaled revenue materially over the past several years, reaching the $50M–$100M range by 2023. Its growth has been financed primarily through external debt rather than operating cash flow, including a $25.0 million Senior Secured Convertible Notes facility closed in November 2022 and an $8.0 million senior secured loan from Decathlon Capital Partners in December 2023 that refinanced a portion of the convertible notes. The company has consistently posted negative EBITDA and net losses through 2020–2023, indicating that current scaling is capital-intensive and dependent on continued access to financing.
Public materials describing an associated solar EPC entity (Legacy Power) indicate iSun's service model includes turnkey project delivery, repowering of existing solar assets, and ongoing operations & maintenance (O&M) services — including monitoring, preventative maintenance, and performance optimization. However, the input data does not specify iSun's own product mix, technology stack, proprietary components, customer names, geographic markets served, or pricing structure. The business model can be characterized as project-based solar EPC with adjacent e-mobility infrastructure deployment, but specific revenue mechanics (recurring vs. one-time, contracted vs. spot, segment mix) are not disclosed in the available inputs.
iSun Energy firmographics
Firmographics- Name
- iSun Energy
- Legal name
- iSun Inc.
- Website
- https://isunenergy.com
- Company type
- Public
- Founded year
- 2011
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- iSun Energy is a NASDAQ-listed (ISUN) clean-energy infrastructure provider that develops and deploys commercial, industrial, and utility-scale solar energy systems and smart-city e-mobility hubs, headquartered in Williston, United States, founded in 2011.
- Ownership category
- akta.pro rank
iSun Energy industry classification
Industry- Product category
- Solar Energy and E-Mobility Infrastructure
- NAICS
- Solar Electric Power Generation (221114)
- akta.pro primary industry
- Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)
- akta.pro secondary industries
- Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging) (IMAFALAJ), Repowering, Augmentation & Retrofit Integration (Capacity Expansion) (EUAEAEAL)
Keywords
Where iSun Energy is headquartered
LocationHeadquarters
- HQ city
- Williston
- HQ country
- United States
- HQ region
- North America
Markets served
iSun Energy business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D
iSun Energy product offering
Product offeringCore offering
iSun Energy develops and deploys solar energy assets and smart city e-mobility hubs. The company's core activity is the build-out and delivery of physical clean-energy infrastructure — solar generation systems and electric mobility infrastructure — for business and municipal customers undertaking the transition to clean energy.
Differentiator
Problem solved
Functional benefit
Products and services
- Solar Energy Systems Developed and deployed by iSun Energy for commercial, industrial, utility, and municipal customers as physical clean-energy infrastructure.
- Smart City E-Mobility Hubs Deployed by iSun Energy to provide electric-mobility infrastructure for smart-city and commercial customers.
Companies that use iSun Energy
Customer profileIdeal customer profiles1 record
iSun Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
iSun Energy partnerships and signals
Strategic signalScale indicators2 records
Recent moves4 records
Expansion highlights3 records
iSun Energy competitors and assessment
Company assessmentBroad incumbents
- Tesla Energy: Provides integrated solar, storage, and increasingly EV charging/offerings—compares to iSun's solar + storage + smart city e-mobility hub positioning, though at vastly larger scale.
- Primoris Services Corporation: Diversified infrastructure contractor with significant utility-scale solar, storage, and power delivery projects; comparable as a public-market peer with overlapping solar EPC plus T&D service lines.
- Blattner Energy (now owned by Quanta Services): One of the largest North American renewable energy EPC firms (now under Quanta Services); a broad incumbent providing scale, balance-sheet, and diversified renewables services iSun competes against.
Direct peers
- Pine Gate Renewables: Developer-EPC hybrid operating in utility-scale solar and storage across the US; comparable to iSun's development-through-commissioning scope and similar customer set (independent power producers, utilities).
- McCarthy Building Companies (Renewables): National EPC with a dedicated Renewables group delivering utility-scale solar and storage projects, directly overlapping iSun's commercial and utility solar execution model.
- SunPower (formerly Maxeon-post spin): Public solar company with residential, commercial, and new energy services franchises; useful comparable for iSun's small-cap public profile and multi-segment solar services exposure.
- SOLV Energy: Largest US utility-scale solar EPC contractor (formerly Swinerton Renewable Energy), executing turnkey PV plus storage projects for developers and utilities—directly comparable to iSun's solar EPC and BESS integration business.
- Mortenson Construction: Major renewable energy EPC with a sizable wind, solar, and storage portfolio serving utility and C&I customers; competes head-to-head with iSun on mid- and large-scale solar EPC bids.
Emerging players
- ChargePoint: Public EV charging network operator; relevant emerging-player comparable for iSun's smart city e-mobility hub line, sharing the small-cap public profile and clean-energy infra narrative.
- Array Technologies: Public solar tracker and balance-of-systems provider serving utility-scale PV; relevant comparable as a small/mid-cap public clean-energy name adjacent to iSun's solar project economics.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat3 records
Key risks5 records
Key highlights5 records
Customer concentration
iSun Energy social profiles
Digital presenceiSun Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
iSun Energy leadership team
Management profileNumber of profiles
Profiles4 records
iSun Energy funding detail
Funding detailFunding overview
Funding rounds3 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
iSun Energy M&A and investment
M&A and investmentM&A
Investments1 record
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about iSun Energy
What does iSun Energy do?
iSun Energy develops and deploys solar energy assets and smart city e-mobility hubs. The company's core activity is the build-out and delivery of physical clean-energy infrastructure — solar generation systems and electric mobility infrastructure — for business and municipal customers undertaking the transition to clean energy.
Is iSun Energy a public or private company?
iSun Energy is a public company. It is classified as public and is currently operating.
When was iSun Energy founded?
iSun Energy was founded in 2011. It employs 251 to 500 people.
Where is iSun Energy based?
iSun Energy is headquartered in Williston, United States, in the North America region.
Who are iSun Energy's main competitors?
Broad incumbents on record are Tesla Energy, Primoris Services Corporation and Blattner Energy (now owned by Quanta Services). Direct peers are Pine Gate Renewables, McCarthy Building Companies (Renewables), SunPower (formerly Maxeon-post spin), SOLV Energy and Mortenson Construction. Emerging players are ChargePoint and Array Technologies.
Does iSun Energy have an API?
No public API is recorded for iSun Energy.
What industry is iSun Energy in?
iSun Energy's product category is Solar Energy and E-Mobility Infrastructure. Its primary akta.pro industry code is EUAMABAB, Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System), with a secondary code of IMAFALAJ, Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging). Its NAICS code is 221114.