Service your whole-home generator twice a year — once before storm season and once mid-cycle — plus a quick visual inspection every month. Annual oil and filter changes, battery testing, and a load test under real conditions are critical to make sure the generator will start when you need it.

Generator maintenance schedule

  • Monthly — Visual inspection, confirm exercise cycle ran
  • Twice yearly — Full service (oil, filter, battery)
  • Annual — Load test under real conditions
  • Battery replacement every 3 years
  • Spark plugs every 200 run-hours or annually

We service every major brand. See backup power service, or join the Mainstream Maintenance Plan for scheduled generator service.