What it is

Commercial standby installation covers generators sized for offices, retail spaces, multi-unit buildings, or facilities with critical power needs (like refrigeration or life-safety systems), typically at higher kW capacity than residential units.

When it's needed

• The property has three-phase electrical service.
• Life-safety systems (fire alarms, emergency lighting, medical equipment) require backup power by code.
• Business operations depend on continuous power (refrigeration, servers, point-of-sale systems).

Process

• A detailed load study covering all circuits that need backup coverage.
• Engineering review for larger installations, which may require a stamped electrical drawing.
• Coordination with the local authority having jurisdiction for commercial permitting.
• Installation, commissioning, and load-bank testing.

Cost factors

• Generator capacity, which scales up significantly for commercial loads
• Whether the site has three-phase service
• Engineering and permitting complexity

Limitations

Commercial projects typically require longer lead times than residential ones due to engineering review and equipment availability at larger kW ratings.

FAQ