Commercial Solar Companies in California 2026: Top EPCs Compared
California commercial solar — 915 MWdc installed in 2025, growing 28% year-over-year — is concentrated among a handful of EPCs and developers that handle most of the state's non-residential projects. This guide profiles the five most prominent commercial-focused players per Solar Power World's 2025 Top California Contractors List, plus notes on financing partners (CleanCapital, Borrego/New Leaf Energy) that shape the market. All data is cross-referenced against SPW, company filings, and industry reporting.
SOLV Energy
Private (PE-backed)
Focus
Major EPC; utility-scale + active C&I
Typical systems
500 kW to multi-MW
Financing
EPC-focused; partners on PPA and CPACE
Notable
1.1+ GW total CA installs in 2024 data; large C&I and community solar projects 2024-2026
Strength
Deep EPC bench, large-project execution capability, strong utility-scale experience that informs commercial work
Watch-out
Primarily utility-scale — mid-market C&I may be a smaller priority than their largest accounts
Baker Electric Solar (Commercial Division)
Private
Focus
C&I rooftop and carport specialist
Typical systems
100 kW to MW+
Financing
Direct sale, PPA, and lease partnerships
Notable
66,000+ kW of California installs; rooftop and carport portfolio
Strength
California-based with long local track record; strong relationships with CA utilities for interconnection
Watch-out
Smaller footprint than SOLV; ideal for mid-market rather than multi-MW campus projects
REC Solar
Private (historically Duke Energy subsidiary; now independent IPP focus)
Focus
Developer/IPP; C&I and community solar
Typical systems
Mid to large
Financing
Owns/operates assets; PPA model dominant
Notable
4,700+ kW of CA installs listed; 700+ projects nationally
Strength
Developer/operator model means they can carry the system as their asset — good fit for PPA-hungry commercial buyers
Watch-out
Less relevant if you want direct ownership; PPA-heavy structure
Cenergy Power
Private, California-based
Focus
Commercial and agricultural EPC
Typical systems
Mid to large
Financing
Direct sale, PPA, CPACE
Notable
450+ MW cumulative; multiple CA agricultural and commercial projects 2024-2025
Strength
CA-native with strong agricultural focus — worth evaluating if your property is in the Central Valley or agricultural corridors
Watch-out
Lower national visibility than SOLV/Baker; local-CA focus is both an advantage and a limit
M Bar C Construction
Private
Focus
Carport and parking-structure specialist
Typical systems
Parking-lot solar canopies, typically 500 kW to multi-MW
Financing
EPC / subcontractor structure
Notable
#1 commercial-only installer in California per Solar Power World; 15 MW Viejas Casino carport; Six Flags carport 2024-2025
Strength
Unmatched specialization in carports/canopies — if you have parking to cover, they are the benchmark
Watch-out
Not a fit for rooftop-only or non-parking-lot commercial projects
Other California Commercial Solar Market Participants
Beyond the five EPCs above, a few other players shape the California commercial market:
- CleanCapital — Private financier / IPP that acquires California DG portfolios (27 MW noted in 2025 activity). Not a primary installer, but a common PPA off-taker / portfolio buyer who ultimately owns the system on your roof.
- Borrego Solar (now New Leaf Energy) — Borrego spun off its development arm as New Leaf Energy in 2022. ECP-backed. Focuses on distributed generation and commercial development rather than residential.
- Sunworks, SunPeak, CB&I Solar, GAF Energy — Lower commercial volume or residential/utility overlap in 2025 SPW data. Not top-tier in commercial-only California installs.
The commercial solar landscape is less consolidated than residential — fewer household names and more specialist EPCs competing on local relationships, interconnection expertise, and financing partnerships. If you're shopping commercial solar in California, get quotes from at least three EPCs that actually specialize in commercial (not residential installers with a commercial division), and confirm their familiarity with your utility's specific interconnection queue and the commercial TOU tariff your property is on.
Data caveat
Exact 2025-2026 install volumes, BBB complaint counts, and lawsuit details for every player were not uniformly available in three independent public sources. Profiles here rely on Solar Power World's 2025 California Contractors List, company websites and press, and PV Magazine USA coverage. No major bankruptcies or restructurings were noted for the five listed firms in 2025-2026.
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