How often should a standby generator be serviced?

Monthly inspection and exercise, quarterly or semiannual service visits, and an annual comprehensive service with load bank testing is a common standard for commercial facilities.

What is load bank testing and why does it matter?

Load bank testing applies a controlled full load to verify the generator can perform at its rating. It also burns off carbon buildup from light loading on diesel units.

Do you handle permits and air district requirements for new generators?

Yes. New generator installations in the Bay Area involve building permits and air district permitting, and we coordinate both.

Can you service the transfer switch as well as the generator?

Yes. Transfer switches are part of every generator maintenance program we provide.

Standby diesel generator for a commercial facility

ELEC-06Electrical· Union City, Alameda County

Generator Service in Union City, CA

Standby generators only matter on the day the utility fails, and East Bay facilities have learned that day comes more often than it used to. Golden Valley Power & Air services standby generator systems for commercial and industrial facilities: diesel and natural gas generator sets, automatic transfer switches, paralleling controls and the fuel, cooling and exhaust systems that support them.

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Sector: Commercial · Industrial
Coverage: Union City, CA
Scope: Repair · PM · Install
Residential: Not offered

We provide the scheduled maintenance, load bank testing and documentation that critical facilities, healthcare, data rooms, cold storage and municipal operations require, and we respond when a generator fails to start.

Generator Service in Union City

Cold storage, food processing and critical facilities in Union City rely on standby generators. We maintain, test and repair generators and transfer switches, and install new standby power systems.

Union City facilities include industrial and warehouse buildings in the western industrial area, food processing, beverage and packaging facilities, light manufacturing and assembly operations and more. See the full Union City service area page for everything we handle locally.

Scope of work

Generators: what we handle

Equipment

Diesel standby generators from 20 kW to 2 MW
Natural gas and LP generator sets
Automatic transfer switches: open, closed and delayed transition
Paralleling switchgear and generator controls
Fuel systems, day tanks, fuel polishing and containment
Batteries, chargers, block heaters and enclosure systems

Repair & troubleshooting

Failure to start: batteries, chargers, starters, fuel and controls
Transfer switch failures and control problems
Cooling system leaks, belts, hoses and radiator issues
Fuel contamination, injectors and fuel delivery faults
Voltage regulator, governor and alternator problems
Alarm and monitoring faults

Maintenance

Monthly, quarterly and semiannual inspections with exercise runs
Annual comprehensive service: oil, filters, coolant, belts and batteries
Load bank testing to verify full-rated performance and prevent wet stacking
ATS inspection, cleaning and transfer testing
Fuel sampling, testing and polishing coordination
Documentation for compliance, insurance and corporate requirements

Installation & replacement

New standby generator installations with permitting and air district coordination
Transfer switch replacements and additions
Generator replacements and capacity upgrades
Docking stations for temporary generator connection

Diagnostics

Common failures and what they mean

Fault 01

Generator did not start during an outage

Dead batteries and failed chargers are the leading cause. Monthly inspections catch them.

Fault 02

Wet stacking and exhaust issues on diesel units

Light loading during exercise runs. Annual load bank testing resolves it.

Fault 03

Transfer switch did not transfer

Control, sensing or mechanism failures. ATS testing is part of every maintenance program.

Fault 04

Fuel degraded in the tank

Diesel degrades over time. Fuel testing and polishing keeps it usable when you need it.

FAQ

Frequently asked questions

Dispatch

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This is an emergencyEquipment down, temperature-critical, or power loss. For fastest response, please also call.

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Commercial and industrial facilities only. We do not provide residential service.

Nearby

Generators near Union City

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Dispatch · Commercial & Industrial

Generators down? We dispatch to commercial and industrial sites.

(408) 370-0120

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