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Generator Availability Calculator

Turn MTBF, repair time, and test hours into availability and the expected hours a site is left unserved.

Inputs

Inputs and assumptions

Start with fleet data, then replace it with the site's own service log.

Service contract response time plus parts availability.

Result

Availability
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Expected unserved hours per year
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Expected failures per year
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Hours the set is expected to run, tests included
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Probability of failure on demand
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What to check

  • Failure and repair logs from this site's own equipment
  • Manufacturer MTBF statements and service contract response time

Related calculators

Screening-grade sizing. Manufacturer load-acceptance curves, ISO 8528-5 transient limits, and the adopted electrical code edition govern the final selection; an engineer signs off before hardware is ordered.

Saved calculations

Keep the assumptions with the result.

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