Define what must keep running
List essential lighting, pumps, air conditioning, servers, machinery and production equipment. Generator selection must account for simultaneous loads and motor starting.
Separate standby from prime power
Standby generation covers grid interruptions. Prime power has a different operating duty. Specify expected operating hours and how demand changes throughout the day.
Understand kVA and kW
kVA measures apparent power; kW measures active power. Power factor relates the two. Adding nameplate ratings alone does not replace a load and transient assessment.
Check the installation space
Allow for ventilation, exhaust, maintenance access, noise control and fuel storage. Qualified professionals should design the installation.
Compare total cost
Assess equipment, installation, fuel use at your expected load, maintenance and parts. Ask for clear assumptions and exclusions.
What to send JMG
Provide the site location, application, load list, available ratings, expected running hours and timeline. For an existing generator, include its rating plate.