Free checklist
Standby generator set annual maintenance checklist
The annual standby generator service is the deep pass — the measurements, cleanings and tests a quarterly round doesn't reach. This checklist keeps the full service on record with the photos that make it defensible later. Work is commonly verified against NFPA 110 — confirm the edition your authority having jurisdiction has adopted.
- Items
- 7
- Photos required
- 12
- Built for
- Subcontractors
Who runs it
The generator service lead, often coordinated with the electrical contractor for the ATS work.
When in the schedule
Once a year, scheduled with building management since it typically requires a planned load transfer or bank load.
The checklist
Every item, and the photo that proves it
The photo count on each row is what RTI would require before the item can be submitted. Copy the list as-is, or load it into RTI and let the gate enforce it.
Load and engine
- 2 photos
Load bank or building load test run at rated capacity
Percentage of nameplate load reached and held for the documented duration, with readings recorded.
- 2 photos
Coolant hoses, belts and radiator inspected
Hoses supple with no swelling or cracking, belts within tension spec, radiator fins clear of debris.
- 1 photo
Coolant sample or condition tested
Freeze protection and inhibitor levels within range, no rust or oil contamination.
Fuel system
- 2 photos
Fuel system and day tank inspected
Tank level gauges accurate, vent lines clear, fuel polished or sampled if age warrants it.
- 1 photo
Fuel lines, filters and transfer pump checked
No weeping at fittings, filters replaced on schedule, transfer pump cycles correctly.
Transfer and connections
- 2 photos
Automatic transfer switch exercised under simulated outage
ATS senses simulated utility loss, starts the set, transfers load, then re-transfers and cools down on retransfer.
- 2 photos
Electrical connections and terminations torqued
Lugs, breaker terminals and grounding connections checked for heat marks and re-torqued to spec.
What usually sends this back
The failures are almost always the evidence, not the work
- Load test run at a fraction of nameplate capacity and reported as a full test.
- Coolant hoses left original past their service life because the engine 'wasn't leaking yet'.
- ATS exercised in test mode only, never proven under an actual simulated utility loss.
Run it with the Photo Gate
A checklist nobody can submit half-finished
Load this list into RTI, stick a QR tag on the area it covers, and the submit button stays locked until every mandatory item is answered and the 12 required photos exist. Approved walks roll into a branded turnover package with a tamper-evident record behind every line.
Submission state
The gate is enforced on the server, so it holds even if the phone is offline when the walk happens.
Verified against
Common questions
- What does this standby generator set annual checklist cover?
- 7 items across 3 sections — load and engine, fuel system, transfer and connections. Each item spells out what the person walking the job is actually looking for, not just a box to tick.
- Who should run this inspection?
- The generator service lead, often coordinated with the electrical contractor for the ATS work.
- When in the schedule should this walk happen?
- Once a year, scheduled with building management since it typically requires a planned load transfer or bank load.
- Why does every item ask for a photo?
- 12 of the 7 items call for photo evidence. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.
- What most often fails a standby generator set annual inspection?
- Load test run at a fraction of nameplate capacity and reported as a full test. Coolant hoses left original past their service life because the engine 'wasn't leaking yet'. ATS exercised in test mode only, never proven under an actual simulated utility loss.
- Can I use this checklist in RTI?
- Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper-evident audit trail.
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