Free browser-based calculator

Generator Maintenance Cost Calculator

Estimate annual service, testing, fluids, batteries and repair reserves.

Project inputs

Change the assumptions to explore an early planning scenario.

Planning result

Enter your assumptions

  • Service contracts
  • Testing and consumables
  • Repair reserve
  • Estimated annual maintenance budget

How to use this result

Use this to separate routine service from testing and unexpected repair allowances.

Manufacturer schedule

Actual maintenance must follow equipment, duty and legal requirements.

Fuel systems

Add separate tank, fuel quality and delivery costs where applicable.

Important: Costs, codes, permits, inspection duties, accessibility rules, environmental requirements and insurance conditions vary by country, province or state, municipality, building use, equipment type, installation date and project scope. Qualified local professionals and the authority having jurisdiction must determine what applies. Generator exhaust can produce deadly carbon monoxide. Electrical backfeed, fuel, fire, noise and exhaust hazards require qualified design and installation. Never operate a portable combustion generator indoors or in a partly enclosed area.