Radar · Energy in CA
Best Energy Companies in CA, United States
The 126 best Energy companies in CA, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: SunPower Corporation.
By Rohit KhannaTrends & Stories
126companies tracked
$872.5Mdisclosed funding
0unicorns
1have raised
FLIAR INTELLIGENCE · ENERGY × CA
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.
171companies analysed
82%cloud-native stacks
2025funding peak (by rounds)
2unicorns
2015median founding year
Ranked: Best Energy companies in CA
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SunPower Corporation SunPower Corp. | $873M | 107 mo ago | Public | — | 1985 | ContentfulApple iCloud MailMicrosoft 365+30 | 3,500 patents Solar photovoltaic mounting hardware, cable management, and energy system integration. | — |
| 2 | A-C Electric Company A-C Electric Company – a 70+ year young employee development factor that just happens to be one of the… | — | — | — | — | — | WordPressMySQLPHP+14 | 1,530 patents Advanced fault detection and isolation for medium‑voltage distribution networks | 2 job openings · 4 internships |
| 3 | AEE Solar AEE Solar was founded in 1979 as Alternative Energy Engineering with the goal of bringing renewable… | — | — | — | — | 1979 | — | — | — |
| 4 | Agility Fuel Solutions Agility® Fuel Solutions is the leading global provider of clean fuel solutions for medium- and heavy-duty… | — | — | — | — | — | — | 222 patents Composite high‑pressure fuel storage and vehicle fuel‑system safety components | — |
| 5 | All Industrial Electric Supply All Industrial Electric Supply is a full service electrical supply distributor available 24x7. | — | — | — | — | 2004 | — | — | — |
| 6 | Amelco Electric Amelco Electric is a construction company based out of 901 Howe Rd, Martinez, California, United States. | — | — | — | — | — | — | — | — |
| 7 | AMERIGAS PROPANE L.P. AMERIGAS PROPANE L.P. | — | — | — | — | — | — | — | — |
| 8 | Asbury Environmental Services Asbury Environmental Services is an oil & energy company based out of 100 W Valpico Rd Ste M, Tracy… | — | — | — | — | — | — | — | — |
Top 1 Energy companies in CA
#1
Public · San Jose, CA · founded 1985 · 4554 employees$872.5Mraised▾
Public · San Jose, CA · founded 1985 · 4554 employees
SunPower Corp. (Nasdaq: SPWR) provides a diverse group of customers with complete solar solutions and services. Residential customers, businesses, governments, schools and utilities around the globe rely on SunPower's more than 30 years of proven experience. From the first flip of the switch, SunPower delivers maximum value and superb performance throughout the long life of every solar system.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 204k LinkedIn followers — 69.9% of this cohort's audience
Investors
DOE, TotalEnergies, Total, CSI RD&D, Cypress Semiconductor, PacRim Venture Partners
Tech stack
Acquia Cloud PlatformAcquia Cloud Site FactoryAdobe AnalyticsAdobe Experience Platform Identity ServiceAdobe Experience Platform LaunchAmazon Cloudfront
Funding & investor landscape
$872.5Mtotal disclosed funding
1companies funded
0disclosed rounds
0rounds last 90 days
Prism market signals · United States · country-scoped Prism corpus, 1,994,997 docs
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
RESEARCH IN CA · Energy
How research on Energy Storage in CA is moving
A read on the academic research around Energy Storage in CA — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 8,483 papers.
Chinese Academy of Sciences and affiliates dominate California's energy-storage research, focusing optimistically on advanced battery and supercapacitor materials, with breakthroughs and advancements vastly outpacing concerns.
8483 papers · stance +0.54 · 37% breakthrough · 11% concern
top institutions
- Chinese Academy of Sciences994
- University of Chinese Academy of Sciences345
- Nanyang Technological University283
- Beijing University of Chemical Technology216
- Ministry of Education193
leading researchers
Bouzek, Karel · Paušová, Šárka · Yan Xu · Yu Zhang · Martin Pumera · Xiong Wen Lou
prism intelligence · tone & topics
96% positive · 1% critical tone
BusinessEnvironmentMaterials ScienceSustainabilityTransportationElectronics
▲
Breakthroughs2,884 · 34%
▼ 36%→34% share
▼0.9× share momentum2 median citations89% since 2021mostly methods-led
Electrolyte research is surging — papers grew from 25 to 471, driving core battery chemistry advances in CA.
rising sub-themes (early→recent)
- Electrolyte25→471
- Battery (electricity)30→441
- Electrochemistry26→436
- Anode33→413
- Cathode28→358
Newly emergingDielectric 0→74 · Thermal 0→58 · Ionic conductivity 0→57
Landmark Graphene Anchored with Co3O4 Nanoparticles as Anode of Lithium Ion Batteries with Enhanced Reversi · 2,431 cites
◆
Advancements3,980 · 47%
▲ 39%→48% share
▲1.2× share momentum1 median citations93% since 2021mostly methods-led
Renewable energy integration is intensifying — advancements papers rose from 37 to 842, now dominating the field.
rising sub-themes (early→recent)
- Renewable energy37→842
- Battery (electricity)37→679
- Photovoltaic system17→446
- Power (physics)8→331
- Supercapacitor56→370
Newly emergingPhase-change material 0→83 · Electricity generation 0→78 · Particle swarm optimization 0→54
Landmark Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization · 4,827 cites
▼
Concerns882 · 10%
▲ 9%→10% share
▲1.1× share momentum3 median citations88% since 2021mostly reviews
Battery safety concerns are escalating — related papers grew from 17 to 195, with electric vehicles newly flagged.
rising sub-themes (early→recent)
- Renewable energy11→199
- Battery (electricity)17→195
- Electrolyte6→121
- Cathode2→92
- Nanotechnology20→109
Newly emergingPhotovoltaic system 0→42 · Voltage 0→23 · Electric vehicle 0→20
Landmark Pseudocapacitive oxide materials for high-rate electrochemical energy storage · 5,233 cites
Common questions
How many Energy companies are there in CA, United States?
Radar tracks 126 indexable Energy companies headquartered in CA, United States that meet our profile-completeness bar.
What is the total funding raised by Energy companies in CA, United States?
The Energy companies in CA, United States on this list have raised a combined $872.5M in disclosed equity funding across 1 funded companies.
Which is the highest-funded Energy company in CA, United States?
SunPower Corporation is the highest-funded Energy company in CA, United States, with $872.5M in disclosed equity funding.
How many Energy companies in CA, United States are funded?
1 of the 126 Energy companies in CA, United States on this list have disclosed at least one equity funding round.
How many Energy unicorns are there in CA, United States?
None of the Energy companies in CA, United States on this list currently has a disclosed valuation of $1B or more.
Who are the top investors in CA, United States Energy companies?
The most active investors in CA, United States Energy companies on this list include a range of venture and angel investors.
Rohit KhannaTrends & Stories
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.