• Available 24/7-365 for service, repairs, sales, load bank tests, rentals and all other things related to standby power!
  • Authorized Gillette, Kohler, GE/Zenith and Blue Star and Generac dealer for sales and service
  • Factory-certified technicians available for Kohler, Generac, MTU, Caterpillar, Zenith, Onan and more...
  • Based in Hayward, CA , we provide mobile service to the Greater San Francisco Bay Area
  • Please see our television ad on KTLN (or you can view it here).
  • We also have branches serving the Amador County, Reno and Seattle areas.
  • Onan, Caterpillar, Kohler, Generac, Detroit Diesel/MTU, MQ - we service them all!
  • We sell and service Generac, ASCO, GE/Zenith, CAT and other major brand ATS (Automatic Transfer Switches)
  • We provide full service for all automatic transfer switches (as well as bypass types) to NFPA-110 and JCo standards.
  • EGSA and OSHA certified technicians.
  • We work with generators powered by natural gas, propane, diesel and their combinations.
  • Have a 10 second start requirement? We provide safety inspections and written certificates of compliance.
  • We provide generator sales and installations meeting NFPA-99 and NFPA-110 regulations.
  • Do you need a remote annunciator or remote monitoring? We are the leading provider of custom annunciator installations.
  • We provide industrial, commercial and residential standby power solutions with a focus on turn-key installations.
  • We specialize in custom installation solutions where attention to detail is paramount.
  • Have solar panels? Whether you just need advice or a gen backup for your off-grid energy system, let us help you.
  • We offer service contracts as well as per-visit generator maintenance.
  • California B, C-10 and C-36 (General, Electrical and Plumbing) Contractor License #914864
  • We carry the $1M insurance ($2M aggregate) required by most government agencies.
  • AAAA Generator Services Inc is able to comply with vendor requirements that are above and beyond our normal offerings. These include third party Vendor Compliance Management Services (VCMS), additional insurance (above our normal $2,000,000), etc.
  • Se habla Español - just don't talk too fast!


Our Company Mission

AAAA Generator Services Inc is a family-run business

Our goal is to help you make the best decision possible for all your standby power needs, from cradle to grave including sales, service and maintenance, from UPS to generators to ATS to fire pump engines. This includes extensive research to help you find the best product for the most competitive price.

We take pride in offering our clients the highest level of service and full client satisfaction. We believe that our hard work, honesty and integrity will continue earning your generator business.

We have years of experience with ALL major brands including:

  • Allis-Chalmers
  • ASCO
  • Blue Star
  • Caterpillar / Olympianv
  • Cummins / Onan
  • Detroit Diesel/MTU
  • Elliott Magnetek
  • Generac / Guardian / Centurion / Honeywell
  • John Deere
  • Katolight
  • Kohler
  • Kubotav
  • MMD
  • MultiQuip (MQ)
  • Simpower
  • Teledyne / Bambozzi
  • Electro-Motion generators
  • GE/Zenith

and too many other brands to mention

We specialize in the following types of electric generators:

  • Acute and sub-acute care facility generators with NFPA99 and NFPA110 (must transfer in 10 seconds) requirements.
  • Convalescent home generators, nursing home generators, hospital generators, etc.
  • Industrial generators and related fire pump engines
  • Diesel generators
  • Diesel trailer generators
  • Diesel light towers
  • Natural gas generators
  • Propane generators
  • Bi-fuel generators (natural gas/diesel, propane/diesel)
  • Stationary generators
  • Uninterruptible power supply (UPS) systems (i.e. Gamatronic, APC)
  • Residential and Commercial liquid cooled standby power generators
  • Residential air-cooled standby power generators (engine must have a minimum of two cylinders)