MAINTENANCE
Commercial generator service and installation.
Standby power that starts when the grid quits: service, load bank testing, and new installations.
THE SHORT VERSION
What commercial generator service involves
A standby generator only matters on the day the power fails, and that day is a terrible time to learn it wasn't maintained. Commercial generator service keeps the unit ready: oil and filters changed, batteries load-tested, coolant checked, and the transfer switch exercised so the handoff actually happens.
Most failures trace to neglected basics, dead batteries above all. A service plan with scheduled visits and a monthly self-test turns the generator from a hope into a system.
AT A GLANCE
Commercial generator numbers
$400-900
ANNUAL SERVICE
Typical yearly maintenance for a 20-60 kW natural gas unit with one to two visits.
$700-1.5k
LARGER UNITS
Annual range above 60 kW or with heavy runtime; diesel adds fuel-system care.
$35-85k
100 kW EQUIPMENT
The equipment price band for a common commercial size, before installation.
Monthly
SELF-TEST
The exercise cycle that catches dead batteries and stuck transfer switches early.
THE HANDOFF
Transfer switch testing and failures
The generator is only half the system. The automatic transfer switch decides when to move the building onto backup power, and a stuck one means a perfect generator running while the building sits dark.
Exercising the switch under load is the test that matters. It belongs in every service visit, not just the annual.
SIZING IT
How commercial generators get sized
Backup power is a priority list, not a guess. What must stay on: life safety, refrigeration, servers, critical equipment? The list sets the kilowatts, and the kilowatts set the budget.
Oversizing wastes capital; undersizing fails the one day it matters. A load study before purchase is cheap insurance both ways.
When did the generator last run under load?
If you have to think about it, that's the answer. A service plan gets it on a schedule.
QUESTIONS
Straight answers.
How much does generator maintenance cost?
Typically $400-900 a year for common 20-60 kW natural gas units, and $700-1,500 for larger or diesel units. It's a fraction of what one failed outage costs.
What does a service visit include?
Oil and filter change, air filter, battery load test, coolant check, control diagnostics, and a transfer switch exercise, with runtime hours dictating frequency.
How much does a commercial generator cost to buy?
Equipment for a 100 kW unit commonly runs $35,000-85,000 before installation, with fuel type and features moving the number. Installation adds site work, gas or fuel supply, and electrical.
Natural gas or diesel?
Natural gas skips fuel storage and its maintenance, which suits most small commercial sites. Diesel carries its own fuel and suits larger or code-driven applications. The load and the site decide.
GET STARTED
Keep the backup ready.
Tell us the generator's size and age, or that you need one. Service plans and installs both come back priced.