Company lists · Data refreshed September 2026

Top 25 Grid integration system designers based in the United States

Name: Grid integration system designers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,424 companies tracked

RevenueBase identified 1,424 grid integration system designers headquartered in the United States as of September 2026 and tracks 37,526 professional contacts across them, including 16,162 with verified work emails. Houston is the largest hub.

This list covers grid integration system designers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

1,424Companies

37,526Contacts tracked

16,162Verified emails

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The 25 largest grid integration system designers based in the United States

Ranked by team size

Top 25 of 1,424 grid integration system designers based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to grid integration system designers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	FTI	Indirect evidence	Menasha, WI, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,741 contacts →
	Indirect evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 19, 2026
2	Fluence	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,863 contacts →
	Indirect evidence “To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…” Source: RevenueBase Database · checked Sep 19, 2026
3	Westwood Professional Services	Indirect evidence	Plano, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,661 contacts →
	Indirect evidence “At Westwood, our purpose is to create a better world for people through our work.” Source: RevenueBase Database · checked Sep 19, 2026
4	Solv Energy	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,286 contacts →
	Indirect evidence “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Source: RevenueBase Database · checked Sep 19, 2026
5	Wanzek Construction, Inc., A Mastec Company	Indirect evidence	Fargo, ND, United StatesHQ checked Sep 19, 2026	1,001-5,000	933 contacts →
	Indirect evidence “Wanzek Construction, Inc, a MasTec Renewables company, is a leading general construction contractor and clean energy services company headquartered in Fargo, North Dakota.” Source: RevenueBase Database · checked Sep 19, 2026
6	PAE	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	201-500	744 contacts →
	Partial evidence “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Source: RevenueBase Database · checked Sep 19, 2026
7	Powersecure, INC	Indirect evidence	Durham, NC, United StatesHQ checked Sep 19, 2026	501-1,000	740 contacts →
	Indirect evidence “PowerSecure, a Southern Company subsidiary, is a leading provider of innovative energy solutions to electric utilities and their industrial, institutional, and commercial…” Source: RevenueBase Database · checked Sep 19, 2026
8	Electric Power Engineers	Partial evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	501-1,000	630 contacts →
	Partial evidence “Electric Power Engineers (EPE) is a global advisory and engineering firm advancing grid reliability, resilience, flexibility, and affordability.” Source: RevenueBase Database · checked Sep 19, 2026
9	Depcom Power, INC	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 19, 2026	1,001-5,000	624 contacts →
	Indirect evidence “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Source: RevenueBase Database · checked Sep 19, 2026
10	Vanderweil Engineers	Indirect evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	201-500	545 contacts →
	Indirect evidence “Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and…” Source: RevenueBase Database · checked Sep 19, 2026
11	Saber Power	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	521 contacts →
	Partial evidence “Saber Power Services, a portfolio company of Greenbelt Capital Partners, is a fully integrated electrical power system services firm providing end-to-end solutions across utility…” Source: RevenueBase Database · checked Sep 19, 2026
12	RRC Companies	Partial evidence	Round Rock, TX, United StatesHQ checked Sep 19, 2026	201-500	494 contacts →
	Partial evidence “RRC is a top-tier designer of utility-scale wind, solar, energy storage, data center, and oil & gas projects in the US and select international markets.” Source: RevenueBase Database · checked Sep 19, 2026
13	Noresco	Partial evidence	Westborough, MA, United StatesHQ checked Sep 19, 2026	201-500	481 contacts →
	Partial evidence “NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Source: RevenueBase Database · checked Sep 19, 2026
14	Babcock Power	Indirect evidence	Danvers, MA, United StatesHQ checked Sep 19, 2026	501-1,000	476 contacts →
	Indirect evidence “Finding a single capable partner to support both large- and small-scale power generation needs can be challenging.” Source: RevenueBase Database · checked Sep 19, 2026
15	Open Systems International	Indirect evidence	Bedford, MA, United StatesHQ checked Sep 19, 2026	1,001-5,000	422 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
16	Signal Energy	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	409 contacts →
	Indirect evidence “Signal Energy is a leading full service design/build contractor providing Engineering, Procurement, and Construction (EPC) services for renewable energy & infrastructure projects.” Source: RevenueBase Database · checked Sep 19, 2026
17	TRIO	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	201-500	383 contacts →
	Indirect evidence “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Source: RevenueBase Database · checked Sep 19, 2026
18	Energyscape Renewables	Indirect evidence	Denver, United StatesHQ checked Sep 19, 2026	501-1,000	379 contacts →
	Indirect evidence “Established in 2019.” Source: RevenueBase Database · checked Sep 19, 2026
19	Supernova	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	201-500	370 contacts →
	Indirect evidence “Supernova embodies the spirit of innovation and dedication to a sustainable future, making it a shining example of what it means to be a leader in the renewable energy industry.” Source: RevenueBase Database · checked Sep 19, 2026
20	Takkion	Indirect evidence	Evansville, WY, United StatesHQ checked Sep 19, 2026	1,001-5,000	358 contacts →
	Indirect evidence “TAKKION is Moving Energy Forward.” Source: RevenueBase Database · checked Sep 19, 2026
21	PCI Energy Solutions	Indirect evidence	Norman, OK, United StatesHQ checked Sep 19, 2026	201-500	346 contacts →
	Indirect evidence “PCIEnergySolutions is a tight-knit team of 300 diligent product experts, engineers, business analysts, and more.” Source: RevenueBase Database · checked Sep 19, 2026
22	NEI Electric Power Engineering, INC	Partial evidence	Lakewood, CO, United StatesHQ checked Sep 19, 2026	201-500	318 contacts →
	Partial evidence “NEI provides professional expertise and design engineering services for all aspects of power systems engineering.” Source: RevenueBase Database · checked Sep 19, 2026
23	Commonwealth Associates, INC	Partial evidence	Jackson, MI, United StatesHQ checked Sep 19, 2026	201-500	305 contacts →
	Partial evidence “We provide expert engineering and consulting services that enable a more reliable and resilient power system.” Source: RevenueBase Database · checked Sep 19, 2026
24	Asplundh Engineering Services	Indirect evidence	Willow Grove, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	284 contacts →
	Indirect evidence “Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…” Source: RevenueBase Database · checked Sep 19, 2026
25	Illumine-I	Indirect evidence	Austin, CA, United StatesHQ checked Sep 19, 2026	201-500	275 contacts →
	Indirect evidence “The world runs on power.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: grid integration system designers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names grid integration system designers.
Partial evidence: Its own public description names part of grid integration system designers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name grid integration system designers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,424 grid integration system designers based in the United States

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Grid integration system designers based in the United States at a glance

As of Sep 19, 2026

43.1%Verified-email coverage

26.4Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

654

11-50

503

51-200

170

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,424 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among grid integration system designers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “grid integration system designers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names grid integration system designers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among grid integration system designers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 16,162 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Grid integration system designers by metro

Grid integration system designers in Houston41
Grid integration system designers in New York30
Grid integration system designers in Austin26
Grid integration system designers in San Diego25

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names grid integration system designers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many grid integration system designers are there based in the United States?

RevenueBase identified 1,424 grid integration system designers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

FTI, headquartered in Menasha, tops this list with the largest team on record.

Which city has the most grid integration system designers?

Houston leads with 41 headquartered companies, followed by New York (30) and Austin (26).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 16,162 verified decision-maker contacts tracked across these 1,424 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.