Commercial standby that meets code and stays online.

Three things. First, commercial is almost always liquid-cooled (radiator and coolant) instead of air-cooled - higher duty cycle, longer life under load. Second, commercial runs three-phase power to match commercial electrical service, while residential is single-phase. Third, commercial install triggers NFPA 110 (emergency and standby power systems) and stricter NFPA 37 setback rules, plus annual documented maintenance is not optional.

We pull a real electrical load study, not a square-footage estimate. That means panel-by-panel reading of connected load, identifying critical vs non-critical circuits, motor starting kVA for compressors and elevators, future growth factor, and the operating duty cycle you need. For a c-store that has to keep pumps and coolers running, sizing is different than a data center on a 24-hour generator-runtime requirement. We size for real-world worst case.

NFPA 110 governs emergency and standby power systems for life-safety and critical loads. It sets requirements for Type, Class, and Level classification, fuel capacity (Level 1 systems typically require enough fuel for the equipment's classified runtime), weekly no-load exercise, monthly load-bank testing, and annual full-load testing under defined conditions. Documentation requirements are strict - logs must be retained and available for inspection.

Depends on application. Natural gas is preferred for facilities with reliable gas service - no on-site fuel storage, no day-tank, fuel runs as long as the gas main is pressurized. Diesel is required for facilities where gas-supply interruption is part of the risk model (data centers, hospitals) or where local code requires on-site fuel storage for life-safety. Bi-fuel runs primarily on natural gas with diesel backup - useful for extended outages.

Annual at minimum, semi-annual or quarterly for higher-criticality systems. Commercial Generac warranty requires documented annual service. NFPA 110 Level 1 systems require monthly load-bank tests and annual full-load tests. AKHC offers commercial maintenance contracts with scheduled visits, fuel sampling on diesel systems, battery testing, load-bank testing, and full documentation that satisfies AHJ inspection.

Yes. Critical facilities run paralleled generators on common bus duct for N+1 or 2N redundancy. Generac MPS (Modular Power Systems) supports paralleling 25kW to 150kW units; larger industrial systems parallel megawatt-class units. AKHC handles design coordination with the facility's electrical engineer of record - we install and commission, the EOR stamps the drawings.

NFPA 37 governs stationary combustion engines and includes fuel-storage clearances. Diesel tanks over 660 gallons trigger additional EPA SPCC (Spill Prevention) requirements. Above-ground diesel storage needs containment, leak detection on day-tanks above certain thresholds, and proper venting. We design the fuel system to code and coordinate inspection.