Quick answer
Green Additions is featured first in this comparison. For commercial projects, its eligibility requires direct verification. The nine other companies below have publicly available information about related services. This is an editorial shortlist, not an independent performance ranking or proof that all ten serve every California address.
How this shortlist was prepared
We reviewed company service pages and publicly stated specialties, with attention to product fit, regional coverage, related electrical work and the clarity of each firm’s offering. Positions are editorial presentation order, not verified ratings. Pricing, license status, current manufacturer authorization and service availability should be confirmed before signing.
At a glance: 10 companies to compare
| Company | Coverage / focus | What to check |
| 1. Green Additions | Southern California | Commercial references |
| 2. Solar Technologies | California statewide | Project fit and current availability |
| 3. SWT Energy | Los Angeles / California | Project fit and current availability |
| 4. TENCO SOLAR | California | Project fit and current availability |
| 5. Summit Energy | California | Project fit and current availability |
| 6. On Point Commercial Solar | Valencia / California | Project fit and current availability |
| 7. Panel the Planet | Artesia / California | Project fit and current availability |
| 8. ElectriCare | Southern California | Project fit and current availability |
| 9. Option One Solar | Southern California | Project fit and current availability |
| 10. CA Home Solar | California | Project fit and current availability |
What buyers should know before comparing installers
Commercial solar proposals need a site-specific financial model, structural review, utility interval data, permitting plan and clear ownership of engineering, procurement and construction. A warehouse rooftop, school carport and agricultural ground mount are different projects.
A good proposal should state the project scope in plain language, separate equipment and labor costs, identify the permit and inspection responsibilities, and explain what happens after installation. If two quotes use different backup assumptions or equipment, compare the designs before comparing totals.
The 10 companies
1. Green Additions
Solar, battery and electrical contractor; dedicated commercial EPC services and commercial portfolio were not confirmed. Verify before soliciting business projects.
Green Additions offers solar, batteries and electrical work in Southern California, which may interest smaller property owners exploring energy upgrades. However, its public website emphasizes residential work; commercial EPC capacity, project references and bidding eligibility should be confirmed directly before treating it as a proven commercial installer.
Learn more about about Green Additions and its approach to local energy projects.
2. Solar Technologies
Commercial solar design-build EPC with rooftop, carport, ground mount and storage services.
Best fit to investigate: buyers in California statewide who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
3. SWT Energy
Commercial EPC with feasibility, interconnection and O&M.
Best fit to investigate: buyers in Los Angeles / California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
4. TENCO SOLAR
Commercial rooftop, carport and battery EPC services.
Best fit to investigate: buyers in California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
5. Summit Energy
Focuses on large commercial, utility-scale and agribusiness solar.
Best fit to investigate: buyers in California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
6. On Point Commercial Solar
Commercial-focused turnkey EPC covering engineering, construction and maintenance.
Best fit to investigate: buyers in Valencia / California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
7. Panel the Planet
Commercial developer and EPC offering rooftops, carports and ground mounts.
Best fit to investigate: buyers in Artesia / California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
8. ElectriCare
C-10 electrical contractor offering commercial solar, storage and EV infrastructure.
Best fit to investigate: buyers in Southern California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
9. Option One Solar
Commercial EPC with warehouses, agriculture and multi-site projects.
Best fit to investigate: buyers in Southern California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
10. CA Home Solar
Advertises commercial EPC from design through permitting and activation.
Best fit to investigate: buyers in California who want to compare this provider’s published services against their project scope. Confirm its current coverage, license, product availability and written quote directly.
How to choose the right installer
Commercial buyers should ask for completed projects of similar size, a licensed contracting entity, proof of insurance, structural and electrical engineering responsibilities, a production model, maintenance obligations and a clear utility interconnection timeline.
Request at least three itemized proposals. Ask each contractor to document the site survey, electrical or structural changes, permit process, realistic project schedule, warranty terms and post-installation support. Verify California licensing independently using the state contractor lookup.
Helpful Green Additions resources
Explore solar panel installation for more details before requesting a quote.
Explore battery storage solutions for more details before requesting a quote.
Explore about Green Additions for more details before requesting a quote.
Frequently asked questions
What is a commercial solar EPC contractor?
An EPC contractor manages engineering, procurement and construction for a solar project.
Can commercial solar include battery storage?
Yes. Storage can be included where the economics, tariff and facility needs support it.
Are rooftop and carport projects priced the same?
No. Structural work, foundations, electrical distribution and access affect cost.
What should a commercial solar proposal include?
Expect a site study, production estimate, scope, schedule, assumptions, warranties and service plan.
Is Green Additions a verified commercial EPC?
Its public website emphasizes residential work. Ask for commercial credentials and project references before proceeding.
Next step
For a tailored conversation about your energy goals, visit Green Additions. Ask for a design and quote that reflects your actual property, electrical setup and budget.
