Generator Maintenance: the difference between owning one and being protected by one

The weekly self-exercise cycle fools people. The unit hums for ten minutes every Wednesday, the owner hears it, and everyone concludes it's fine. But the self-test runs unloaded — a light jog, not the marathon. An outage asks the engine to carry your whole panel for hours or days, and that's when the deferred problems surface: a battery that could crank a warm engine but not a cold one, oil that's been degrading for four Georgia summers, a fuel regulator drifting out of spec, a corroded connection that only opens up under real current. Coastal conditions accelerate all of it — humidity, salt air on the islands, wasp nests in the enclosure louvers, ant colonies that have a documented fondness for controller wiring.

• Oil & filter change. Air-cooled engines run hot in our climate; fresh oil on schedule is the cheapest life-extension a unit can get.
• Battery test & replacement cycle. The single most common cause of a no-start. We load-test it, not just voltage-check it, and replace on evidence rather than after the failure.
• Load-bank & transfer testing. The unit runs under genuine load, and the automatic transfer switch performs a real handoff — the two checks a driveway glance can never give you.
• Fuel system inspection. Gas pressure verified at the regulator; on LP systems, tank levels and lines checked so storm week doesn't start with a fuel surprise.
• Coolant service on liquid-cooled units. Larger whole-home machines carry radiators, and coastal heat is unkind to old coolant.
• Enclosure & wiring check. Corrosion, rodents, insects, debris in the louvers — small housekeeping that prevents expensive electrical faults, and doubly important on salt-air island installs.
• Controller & exercise settings. Firmware, clock, and self-test schedule confirmed, error history read and cleared with explanations, not shrugs.

A standby generator is a fifteen-to-twenty-year asset when it's serviced and a five-to-eight-year disappointment when it isn't — the gap is entirely maintenance. If you inherited a unit with a house purchase and have no idea when it was last touched, that's a common and fixable situation: we'll baseline it with a full service and a load test, tell you honestly what shape it's in, and put it on an annual cycle. And if the verdict is that the old unit is undersized for how you actually live, the sizing guide and the installation page cover the upgrade path with real numbers.