Best Energy Companies in Hawaii, United States
The 41 best Energy companies in Hawaii, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Holu Hou Energy.
Our analysis of 171 Energy companies
$71.4b in tracked funding; 82% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy companies in Hawaii
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Holu Hou Energy Renewable energy solutions for homeowners, apartment owners, and businesses | $36M | 29 mo ago | Acquired | Brad H Co-Founder and CEO | 2019 | WordPressMySQLPHP+21 | — | — |
| 2 | Sopogy Solar Power Technology | $33M | 163 mo ago | Acquired | — | 2002 | — | 54 patents Parabolic trough solar thermal collectors and their tracking/support structures. | — |
| 3 | Keahole Solar Power Solar Energy Storage and Installation | $30M | 187 mo ago | Series B | — | 2007 | — | — | — |
| 4 | Pacific Biodiesel Multi-feedstock technology developer for biodiesel | $3M | 18 mo ago | Funding Raised | Robert King CEO | 1995 | WordPressMySQLPHP+21 | — | — |
| 5 | Natural Power Concepts Innovative renewable energy solutions provider addressing the global energy crisis | $2M | 190 mo ago | Public | John Pitre Founder | 2007 | — | 80 patents Portable foldable wind turbine blade designs for compact renewable energy generation | — |
| 6 | Kauai Island Utility Cooperative Electric cooperative providing electrical service to Kauai with approximately 38,000 metered locations. | $2M | 13 mo ago | Funding Raised | — | 2002 | DrupalApple iCloud MailMicrosoft 365+25 | — | — |
| 7 | Holu Energy Turnkey solutions provider for the commercial and industrial solar sector | $100K | 88 mo ago | Deadpooled | Ted Peck Founder | 2015 | — | — | — |
| 8 | Hawaiian Electric Developer of solar energy projects | — | 167 mo ago | Funding Raised | — | 1881 | Apple iCloud MailJW PlayerBootstrap+17 | — | — |
Top 9 Energy companies in Hawaii
#1
Funding Raised · Lihue, Hawaii · founded 2002$1.6Mraised▾
Kauai Island Utility Cooperative is an electric cooperative located on the island of Kauai in Hawaii. It was formed in 2002 and serves approximately 35,000 member-owners. They provide electrical service to Kauai and offer payment options, outage center information, and payment assistance programs.
- Jul 2025Grant (prize money)$1M
- Aug 2008Grant (prize money)$300K
- Apr 2008Grant (prize money)$300K
#2
Funding Raised · Kahului, Hawaii · founded 1995 · 54 employees$2.9Mraised▾
Pacific Biodiesel was conceived in 1995 in response to serious environmental and health concerns surrounding unmanageable quantities of used cooking oil. Their expertise lies in constructing and operating biodiesel processing plants, as well as producing and marketing quality fuels. Pacific Biodiesel has built 12 facilities on the mainland U.S. and Japan, and completed expansions on several of those plants. It’s newest venture, Big Island Biodiesel, located on Hawaii Island, began production in 2012.
- Feb 2025Grant (prize money)$23.5K
- Aug 2018Grant (prize money)—
- Sep 2011Grant (prize money)$460K
- Sep 2011Grant (prize money)$82.1K
#3
Acquired · Honolulu, Hawaii · founded 2019$36Mraised▾
Renewable energy solutions for homeowners, apartment owners, and businesses. The company provides solar energy storage and management solutions, enabling energy independence and resilience. They offer turn-key solar energy and storage systems for residential and commercial units, focusing on safety and high power. Their solutions harness solar panel power, store energy, and facilitate sharing among multiple units. They cater to homeowners, apartment owners, businesses, and installers, offering renewable, sharable energy solutions. The company is committed to bringing affordable solar energy to communities, promoting clean energy adoption. They are involved in de-carbonizing multi-dwelling unit residential properties with innovative technology.
- Mar 2024Series A$35M
- Feb 2021Seed$300K
- Dec 2019Seed$700K
#4
Acquired · Honolulu, Hawaii · founded 2002$33.4Mraised▾
Sopogy designs, manufactures, and markets micro-scaled concentrating solar power technology (MicroCSP); and sells related software, and services. Their products include SopoFlare, SopoNova, SopoHelios, SopoTitan, SopoLite, and the SopoSoft operating system. The company sells to Independent Power Producer, Oil & Gas industry, Commercial & Industrial sector. The company assets were acquired by Hitachi Power Systems in 2014.
- Jan 2013Series E$4M
- Oct 2012Series E$5.2M
- Apr 2012Series C$375K
- Mar 2012Series C$1M
#5
Series B · Honolulu, Hawaii · founded 2007 · 5 employees$29.6Mraised▾
Keahole Solar Power is a solar project and technology developer. Using different solar technologies including MicroCSP (from a Hawaii company “Sopogy”) Keahole is developing new proprietary methods for energy storage, installation, operation, and software/controls for solar farms.
- Jan 2011Series B$7.4M
- Apr 2010Series B$17.9M
- Dec 2008Series A$4.2M
- 2008Series A—
#6
Public · Honolulu, Hawaii · founded 2007 · 4 employees$2.4Mraised▾
Innovative renewable energy solutions provider addressing the global energy crisis. The company focuses on capturing abundant renewable resources through commercially viable solutions. Their mission is to provide innovative technologies that address the global energy crisis. They are committed to developing and implementing solutions that harness the power of nature to create a more sustainable future. The company aims to be a leader in the renewable energy sector, offering solutions that are both environmentally responsible and economically sound. They are dedicated to innovation and the development of new technologies that can help to solve the world's energy challenges.
- Oct 2010Seed$50K
- Aug 2010Seed$2.4M
#7
Deadpooled · Honolulu, Hawaii · founded 2015$100Kraised▾
Holu Energy provides full-end solar services to the commercial, industrial and non-profit organizations. Provides project planning & development, analysis & risk management, financing & execution and O&M services. Projects include a 432kW parking shade PV system, a 412kW rooftop PV array for the University of the Nations.
- Apr 2019Seed$100K
#8
Funding Raised · Honolulu, Hawaii · founded 1881 · 2529 employees—raised▾
Developer of solar energy projects
#9
Deadpooled · Honolulu, Hawaii · founded 2006—raised▾
Hawai`i BioEnergy LLC (HBE) is a consortium established by three of Hawaii's largest landowners - Kamehameha Schools, Grove Farm Company Inc, and Maui Land & Pineapple Inc, along with venture capital partnerships including Vinod Khosla, Ulupono Initiative and Finistere Ventures. They have established this company to produce biofuels locally from Hawaii to reduce the dependence of foreign imports. The company has already tied up with several companies and associations to supply their bioethanol and jet fuel.
- Jun 2007Seed—
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Grid Energy Storage is moving in the United States
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 5,941 United States-affiliated papers.
- Electric Power Research Institute204
- Pacific Northwest National Laboratory202
- Argonne National Laboratory193
- Northeastern University151
- Massachusetts Institute of Technology124
- Battery (electricity)57→359
- Electrolyte37→318
- Electrochemistry30→240
- Cathode32→224
- Anode37→209
- Renewable energy40→492
- Battery (electricity)59→507
- Power (physics)8→227
- Electrolyte27→244
- Electrochemistry37→240
- Battery (electricity)35→184
- Renewable energy24→156
- Electrolyte13→114
- Electrochemistry10→80
- Cathode9→72
Where energy storage is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing energy storage patents in the United States
United States energy storage patent filing is accelerating — 8,522 filings from 3,681 assignees (2016–2025), led by General Electric, ESS Technology, GM Global TECH Operations; annual filings 687→1058.
- General Electric592
- ESS Technology276
- GM Global TECH Operations233
- Fastcap Systems205
- UNIV California180
- Rondo Energy157
- United Technologies154
- Battelle Memorial Institute146
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.