Insights

Strong Industry Presence iSun has a long-standing reputation in the renewable energy sector, with over 50 years of experience and a proven track record of deploying large-scale solar projects and advanced electrical solutions, making it a reliable partner for diverse energy infrastructure needs.

Expanding Renewable Portfolio The company's recent focus on residential, commercial, municipal, and utility-scale solar projects, along with solar EV charging solutions, presents multiple cross-selling opportunities across different market segments seeking sustainable energy solutions.

Recent Financial Moves The rescission of a reverse stock split and strategic executive restructuring indicate forthcoming growth initiatives and increased operational focus, suggesting potential for new partnerships and investment opportunities aligned with their long-term plans.

Market Growth Potential With increasing investments in clean energy and a rising trend in renewable infrastructure, iSun is positioned to capitalize on emerging demand, especially in solar and electric mobility sectors, opening avenues for collaboration on innovative projects.

Investment and Stock Momentum The recent surge in iSun’s stock price reflecting strong trading activity and investor interest signifies heightened visibility and potential interest from financial partners and institutional investors seeking to support or participate in their growth story.

iSun Tech Stack

iSun uses 8 technology products and services including Facebook Pixel, Open Graph, Google Fonts API, and more. Explore iSun's tech stack below.

  • Facebook Pixel
    Analytics
  • Open Graph
    Content Management System
  • Google Fonts API
    Font Scripts
  • Modernizr
    Javascript Libraries
  • LiveChat
    Live Chat
  • Kinsta
    Platform As A Service
  • HTTP/3
    Web & Portal Technology
  • Facebook
    Widgets

Media & News

iSun's Email Address Formats

iSun uses at least 2 format(s):
iSun Email FormatsExamplePercentage
First@isunenergy.comJohn@isunenergy.com
55%
FLast@isunenergy.comJDoe@isunenergy.com
27%
Last@isunenergy.comDoe@isunenergy.com
18%
First.Last@renewz.comJohn.Doe@renewz.com
68%
Last.First@renewz.comDoe.John@renewz.com
13%
FirstL@renewz.comJohnD@renewz.com
10%
Last.F@renewz.comDoe.J@renewz.com
9%

Frequently Asked Questions

Where is iSun's headquarters located?

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iSun's main headquarters is located at 400 Avenue d Williston, Vermont 05495 United States. The company has employees across 4 continents, including North AmericaAsiaAfrica.

What is iSun's stock symbol?

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iSun is a publicly traded company; the company's stock symbol is ISUN.

What is iSun's official website and social media links?

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iSun's official website is isunenergy.com and has social profiles on LinkedIn.

What is iSun's NAICS code?

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iSun's NAICS code is 33441 - Semiconductor and Other Electronic Component Manufacturing.

How many employees does iSun have currently?

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As of December 2025, iSun has approximately 201 employees across 4 continents, including North AmericaAsiaAfrica. Key team members include Chief Executive Officer: J. P.Commercial Project Sales & Development Director: P. C.Corporate Controller: C. R.. Explore iSun's employee directory with LeadIQ.

What industry does iSun belong to?

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iSun operates in the Renewable Energy Semiconductor Manufacturing industry.

What technology does iSun use?

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iSun's tech stack includes Facebook PixelOpen GraphGoogle Fonts APIModernizrLiveChatKinstaHTTP/3Facebook.

What is iSun's email format?

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iSun's email format typically follows the pattern of First@isunenergy.com. Find more iSun email formats with LeadIQ.

How much funding has iSun raised to date?

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As of December 2025, iSun has raised $8M in funding. The last funding round occurred on Dec 14, 2023 for $8M.

When was iSun founded?

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iSun was founded in 1972.

iSun

Renewable Energy Semiconductor ManufacturingVermont, United States201-500 Employees

iSun is a mid-sized company based in Williston, Vermont, operating in the renewable energy semiconductor manufacturing sector. It traces its roots to 1972 and has worked as an electrical contractor for Fortune 500 companies, delivering projects that range from clean rooms and fiber optic installations to flight simulators and solar systems totaling more than 400 megawatts. The company provides a broad suite of solar services across residential, commercial, industrial and municipal markets, and offers solar-powered electric vehicle charging solutions for both grid-tied and battery-backed solar EV systems. 

Its customer base spans residential to utility-scale projects, with a focus on accelerating the adoption of electrification technologies and solar energy. In March 2024, iSun appointed Robert J. Zulkoski as Chief Executive Officer, marking a leadership transition as the company continues its growth-focused activities.

Section iconCompany Overview

Headquarters
400 Avenue d Williston, Vermont 05495 United States
Stock Symbol
ISUN
NAICS Code
33441 - Semiconductor and Other Electronic Component Manufacturing
Founded
1972
Employees
201-500

Section iconFunding & Financials

  • $8M

    iSun has raised a total of $8M of funding over 3 rounds. Their latest funding round was raised on Dec 14, 2023 in the amount of $8M.

  • $25M$50M

    iSun's revenue is estimated to be in the range of $25M$50M

Section iconFunding & Financials

  • $8M

    iSun has raised a total of $8M of funding over 3 rounds. Their latest funding round was raised on Dec 14, 2023 in the amount of $8M.

  • $25M$50M

    iSun's revenue is estimated to be in the range of $25M$50M

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