• Available 24/7-365 for repair of your backup power generator
  • Based in Hayward and Fiddletown, CA, we provide mobile repair to the Greater San Francisco Bay Area.
  • Warranty repair available for industrial, commercial and residential generators.
  • Generac MPS, Generac Industrial, Phase A, Controls and commercial/residential factory-trained and certified.
  • Onan, Caterpillar, Kohler - we repair them all!
  • Residential, commercial and industrial standby generators and transfer switches.
  • Natural gas, propane, diesel, gasoline and their combinations.
  • Have a 10 second requirement? We provide safety inspections and written certificates of compliance.
  • We offer service contracts as well as per-visit generator repair.
  • California C-10 Electrical Contractor as well as B General Contractor License #914864
  • We carry the $1M insurance ($2M aggregate) required by most government agencies. Additional coverage available.
  • Se habla Español - just don't talk too fast!

We have years of experience with ALL major brands including:

We specialize in the following types of backup power:

  • 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)

We do -NOT- provide services for:

  • Portable (camping) generators (i.e. Honda, inverter, open-frame)
  • RV generators (except diesel and/or fleet generators, by specific exception)
  • Gasoline generators (except life-safety applications, again by specific exception)
  • Ozone generators
  • Wind generators
  • Hydro generators
  • Single-cylinder air-cooled residential standby power generators. These include Generac below ~10kW.
  • Any generator brand or type that has a history of being inherently unreliable. While AAAA can make most unreliable generators reliable, custom modifications and repairs can be cost-prohibitive.
  • Generators that would require illegal modifications to make reliable. For example, a design flaw that prevents the generator from starting under certain barometric conditions (i.e. fuel mixture is too lean) would qualify because California prohibits modifying fuel systems, making the repair this generator needs illegal. AAAA has identified this very condition in several single-cylinder engines. As AAAA cannot legally provide the repair (and doesn't wish to be associated with generators that fail every time the wind blows), AAAA's has simply discontinued support for single-cylinder residential generators.
  • Intentionally neglected generators. AAAA employs talented technicians who can repair just about any issue with just about any generator so it wounds us to be asked to neglect a generator. We don't provide "service-by-repair" (neglecting a generator until it breaks) and we don't offer support for generators where a reliability issue has been identified but its repair is declined. There are plenty of local companies who will gladly take your money to rush to the site every time the power is out and still will -not- repair your generator. AAAA Generator Services Inc is -not- one of those companies.