BBB Accredited Business Profile

A1 Sun, Inc.

A1 Sun, Inc.

(510) 526-5715

A1 Sun, Inc.

11 years in business
1435 4th St
Berkeley, CA 94710-1335
Additional Email Addresses
BBB File Opened: 10/15/2007
Business Started: 01/01/2007
Business Started Locally: 01/01/2007
Business Incorporated: 01/04/2007 in CA
Type of Entity
Business Management
  • Ms. Kathleen Giustino, CFO
  • Mr. Larry Giustino, Principal Owner
Business Category
  • Solar Energy Design
  • Solar Energy Equipment Dealers
  • Solar Energy Contractors
  • Solar Energy Product Services

Additional Information
  • This business service area covers:The Entire East Bay
Products & Services
A1 Sun, Inc. installs photovoltaic and domestic hot water systems for residential and commercial customers. Our design team can create innovative solutions for your solar needs.
Service Area

East Bay- Berkeley, Oakland, Piedmont, Albany, El Cerrito, Richmond and Beyond.

Southern Marin.

Further for the right customer

Alternate Business Names
  • A1 Sun, Inc., Solar Installation
Licensing, Bonding or Registration
This business is in an industry that may require professional licensing, bonding or registration. BBB encourages you to check with the appropriate agency to be certain any requirements are currently being met.
Number of Employees: 
BBB accredited business



This company offers consultation design and solar installation services.

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BBB Reason for Ratings

BBB rating is based on 13 factors: Get the details about the factors considered.

Business Profile

Licensing information is provided in the BBB Business Profiles to inform the public about industries that may require professional licensing, bonding, or registration. Better Business Bureau encourages you to check with the appropriate agency to be certain any requirements are currently being met.
BBB promotes truth in advertising by contacting advertisers whose claims conflict with the BBB Code of Advertising. These claims come to our attention from our internal review of advertising, consumer complaints and competitor challenges. BBB asks advertisers to substantiate their claims, change ads to make offers more clear to consumers, and remove misleading or deceptive statements.
BBB reports on known significant government actions involving the business's marketplace conduct.
BBB reports on a company that is out of business for one year from the date the company closes its doors or ceases to do business.
BBB reports on unauthorized use of the Better Business Bureau's name and/or logo for as long as the business continues to use it in any advertising, or for one year after the business ceases any repeated unauthorized uses.
BBB reports on a business’s bankruptcy as long as the business remains in bankruptcy.
BBB reports when mail sent to the business was returned by the Postal Service.

A1 Sun, Inc.

A1 Sun, Inc.


Customer Review Rating:

This business has no complaints filed

Composite Score: