Generator Inspection Checklist (Free Excel Template)
A generator inspection checklist for portable and towable job-site generators, including welder-generators. It covers checks before start-up, a second round after the engine is running, and monthly items, all on one 31-day sheet per unit.
Excel (.xlsx) · 4 sheets · Updated 2026-10-21
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Who is this generator inspection checklist for?
- Contractors who bring portable generators to construction sites
- Electricians or foremen put in charge of temporary power
- Crews running welder-generators in the field
When to use it
Check the generator each day before work: once before starting it and once right after it is running. Use one sheet per unit per month, and file it at the end of the month. Monthly items sit at the bottom of the same sheet; mark them in the column for the day they were done.
What's included
The template includes the following. Delete anything you do not need.
- Header for unit, unit ID, type and output, job site, month, and person in charge
- Setup and surroundings: level, exhaust direction, flammables, rain and water, fire extinguisher, carbon monoxide, posted rating
- Fuel, oil, and cooling: fuel, engine oil, coolant, fan belt, air cleaner, refueling
- Electrical: GFCI test, grounding, cords and connectors, cord routing, panel covers, transfer switch
- After start-up: noise, exhaust color, voltage and frequency, warning lights, leaks
- Monthly: battery, filters, insulation resistance, ground rod and ground resistance, run hours
- Initials for inspector, person in charge, and GC, a defect record, and a print sheet
Preview the Excel file
This is the actual file. Use the tabs below to switch between the 4 sheets. How to mark each result is explained on the "Instructions" sheet.
| A | |
|---|---|
| 1 | Portable Generator Inspection Checklist (Daily and Monthly) |
| 2 | |
| 3 | ■ Source |
| 4 | Worker Library https://worker-library.com/templates/generator-inspection-checklist/ |
| 5 | Request a template or an extra item: https://worker-library.com/contact/ |
| 6 | |
| 7 | ■ Sheets in this workbook |
| 8 | "Entry Sheet" … The sheet you fill in on a computer. Landscape layout. |
| 9 | "Sample (Filled In)" … A filled-in example. Use it as a guide to how each column is written. |
| 10 | "Print (Letter)" … For printing and filling in by hand. Taller rows, and the column headings repeat at the top of every page. Set up for US Letter. |
| 11 | |
| 12 | ■ How to use |
| 13 | 1. Fill in the unit ID, type, output, and location at the top. Rental units change each month, so do not leave this blank. |
| 14 | 2. Before starting, check setup, fuel and oil, and electrical. Pick ✓ for OK, X for a defect, or N/A for an item that does not apply that day. |
| 15 | 3. Press the GFCI test button and confirm it trips. If any electrical item is X, do not use the generator until it is repaired or replaced. |
| 16 | 4. After start-up, check noise, exhaust color, output voltage, warning lights, and leaks. These cannot be seen with the engine off. |
| 17 | 5. Once a month, do the monthly rows in the column for that day, and write the insulation and ground resistance readings in the notes so you can compare month to month. |
| 18 | |
| 19 | ■ How to mark results, and what to do (read before you start) |
| 20 | ✓ OK … Use as normal. |
| 21 | X Defect … Stop using it right away. Tell your supervisor and fill in the defect record below. |
| 22 | N/A … Not applicable today. Do not leave the cell blank. A blank cell means "not checked". |
| 23 | The person doing the inspection may decide to stop. Nobody is blamed for stopping. If in doubt, mark X. |
| 24 | After a repair, do not use it until the verifier writes the date and time it was returned to service. |
| 25 | |
| 26 | ■ Adapting it to your site |
| 27 | • For a welder-generator, add rows for the welding leads, electrode holder, and work clamp. |
| 28 | • For several units, copy the sheet once per generator. |
| 29 | • To track fuel added, split the notes column and add a "Fuel added (gal)" column. |
| 30 | • To log output voltage and frequency as numbers, clear the data validation on those cells. |
| 31 | • Mark N/A, or delete the row, for items that do not apply to your unit. |
| 32 | |
| 33 | ■ Things to watch |
| 34 | • This is a general job-site template, not an official OSHA form, and it is not for permanently installed standby or emergency generators, which have their own inspection programs. |
| 35 | • Generator exhaust contains carbon monoxide. Do not run a generator indoors or in enclosed or partly enclosed spaces, and keep it away from doors, windows, and air intakes. Follow the manufacturer's manual. |
| 36 | • Whether the generator frame must be grounded depends on the unit and how it is used. Follow the manufacturer's manual and ask a qualified electrician. |
| 37 | • Fuel storage may be limited by fire codes and your site rules. Check the rules that apply to your site. |
| 38 | |
| 39 | ■ About this template |
| 40 | A free inspection template from Worker Library. |
| 41 | You may copy, edit, and print it for use in your own organization. Add or delete items as you need. |
| 42 | Please do not redistribute or sell the template itself. |
| 43 | |
| 44 | ■ Important notice |
| 45 | This template organizes common inspection items for reference. It is not an official form issued by OSHA or any other authority, and using it does not by itself show compliance. |
| 46 | Which inspections are required, how often, and how long records must be kept depend on the equipment, industry, size of the operation, and location (federal, state, and local rules can all apply). |
| 47 | Check the regulations and standards that apply to you, the manufacturer's instructions, and a qualified or competent person. |
| 48 | Worker Library accepts no liability for any loss arising from the use of this template. |
| 49 | Regulations change. Check the source page above for the latest version. |
| 50 | |
| 51 | ■ Updated |
| 52 | 2026-10-21 (reviewed every 3 months) |
| 53 | |
| 54 | ■ About Worker Library |
| 55 | Worker Library publishes free Excel inspection checklists, logs, and forms for maintenance, safety, and quality teams. |
| 56 | All templates: https://worker-library.com/templates/ |
| A | B | C | D | E | F | |
|---|---|---|---|---|---|---|
| 1 | Portable Generator Inspection Checklist (Daily and Monthly) | |||||
| 2 | Unit | Unit ID | ||||
| 3 | ||||||
| 4 | Inspection item | 1 | 2 | 3 | 4 | 5 |
| 5 | ■ Before start: setup and surroundings | |||||
| 6 | Set level; not sinking, tilted, or rocking | |||||
| 7 | Exhaust not pointed at people, flammables, or openings | |||||
| 8 | No fuel, rags, lumber, or other flammables around the unit | |||||
| 9 | Protected from rain, standing water, and flooding | |||||
| 10 | Fire extinguisher within reach and inspected | |||||
| 11 | Not running inside a building, tent, trench, or other enclosed or partly enclosed space; exhaust away from doors, windows, and air intakes (carbon monoxide) | |||||
| 12 | Rated output and name of the person in charge posted on the unit | |||||
| 13 | Repairs to last defect (X) completed | |||||
| 14 | ■ Before start: fuel, oil, and cooling | |||||
| 15 | Enough fuel; no fuel leaks or seepage | |||||
| 16 | Engine oil between the marks; no oil leaks | |||||
| 17 | Coolant level; radiator not clogged or leaking (water-cooled) | |||||
| 18 | Fan belt tension, wear, and cracks | |||||
| 19 | Air cleaner not clogged or dirty | |||||
| 20 | Refuel only with the engine off and cool | |||||
| 21 | ■ Before start: electrical | |||||
| 22 | GFCI or ground-fault breaker trips with the test button | |||||
| 23 | Grounding conductor not broken; ground rod not loose or pulled up | |||||
| 24 | Extension cords and connectors: no damaged insulation or outer jacket | |||||
| 25 | Terminals and connectors not loose; no signs of overheating or discoloration | |||||
| 26 | Cords not run across vehicle routes, through water, or over sharp edges | |||||
| 27 | Panel cover and doors closed; unused outlets covered | |||||
| 28 | Not connected to building wiring unless through a transfer switch (no backfeeding) | |||||
| 29 | ■ After start-up | |||||
| 30 | No abnormal noise, vibration, smell, or smoke | |||||
| 31 | Exhaust color normal (no white or black smoke) | |||||
| 32 | Output voltage and frequency within rated range | |||||
| 33 | Oil pressure, coolant temperature, and charge warning lights off | |||||
| 34 | No fuel, oil, or coolant leaks anywhere | |||||
| 35 | ■ Monthly (once a month; mark the column for the day it was done) | |||||
| 36 | Battery: electrolyte level, terminal corrosion, state of charge | |||||
| 37 | Fuel filter and oil filter: dirt and replacement due date | |||||
| 38 | Insulation resistance test (write the reading in the notes) | |||||
| 39 | Ground rod driven in and secure; ground resistance measured | |||||
| 40 | Run hours recorded; parts due at next service checked | |||||
| 41 | Inspected by (initials) | |||||
| 42 | Person in charge (initials) | |||||
| 43 | GC check (initials) | |||||
| 44 | ||||||
| 45 | Defect record (fill in every time you mark a defect. Fill left to right in the order things happened. "Condition found" is written by the person who found it, "Corrective action" by the person who fixed it, "Verified by" by the person who checked it.) | |||||
| 46 | Date / item | Condition found | ||||
| 47 | ||||||
| 48 | ||||||
| 49 | ||||||
| 50 | ||||||
| 51 | Reviewed by (supervisor) | |||||
| 52 | ||||||
| 53 | ||||||
| 54 | Notice: This is a general-purpose inspection record. It is not an official government form and does not by itself show compliance with OSHA or any other regulation or standard. | |||||
| 55 | Which inspections you need, how often, and how long to keep records depend on your equipment, industry, and location. Check the regulations that apply to you, the manufacturer's instructions, and a qualified person. | |||||
| 56 | Worker Library accepts no liability for any loss arising from the use of this template. Regulations change; check the source page for the latest version. | |||||
| 57 | Worker Library https://worker-library.com/templates/generator-inspection-checklist/ Updated 2026-10-21 | |||||
This preview shows the first 6 of 33 columns. The downloaded file contains everything.
| A | B | C | D | E | F | |
|---|---|---|---|---|---|---|
| 1 | Portable Generator Inspection Checklist (Daily and Monthly) [SAMPLE] | |||||
| 2 | Unit | Portable generator | Unit ID | GE-02 | ||
| 3 | ||||||
| 4 | Inspection item | 1 | 2 | 3 | 4 | 5 |
| 5 | ■ Before start: setup and surroundings | |||||
| 6 | Set level; not sinking, tilted, or rocking | ✓ | ✓ | ✓ | ✓ | ✓ |
| 7 | Exhaust not pointed at people, flammables, or openings | ✓ | ✓ | ✓ | ✓ | ✓ |
| 8 | No fuel, rags, lumber, or other flammables around the unit | ✓ | ✓ | ✓ | ✓ | ✓ |
| 9 | Protected from rain, standing water, and flooding | ✓ | ✓ | ✓ | ✓ | ✓ |
| 10 | Fire extinguisher within reach and inspected | ✓ | ✓ | ✓ | ✓ | ✓ |
| 11 | Not running inside a building, tent, trench, or other enclosed or partly enclosed space; exhaust away from doors, windows, and air intakes (carbon monoxide) | ✓ | ✓ | ✓ | ✓ | ✓ |
| 12 | Rated output and name of the person in charge posted on the unit | ✓ | ✓ | ✓ | ✓ | ✓ |
| 13 | Repairs to last defect (X) completed | ✓ | ✓ | ✓ | ✓ | ✓ |
| 14 | ■ Before start: fuel, oil, and cooling | |||||
| 15 | Enough fuel; no fuel leaks or seepage | ✓ | ✓ | ✓ | ✓ | ✓ |
| 16 | Engine oil between the marks; no oil leaks | ✓ | ✓ | ✓ | ✓ | ✓ |
| 17 | Coolant level; radiator not clogged or leaking (water-cooled) | ✓ | ✓ | ✓ | ✓ | ✓ |
| 18 | Fan belt tension, wear, and cracks | ✓ | ✓ | ✓ | ✓ | ✓ |
| 19 | Air cleaner not clogged or dirty | ✓ | ✓ | ✓ | ✓ | ✓ |
| 20 | Refuel only with the engine off and cool | ✓ | ✓ | ✓ | ✓ | ✓ |
| 21 | ■ Before start: electrical | |||||
| 22 | GFCI or ground-fault breaker trips with the test button | ✓ | ✓ | ✓ | X | ✓ |
| 23 | Grounding conductor not broken; ground rod not loose or pulled up | ✓ | ✓ | ✓ | ✓ | ✓ |
| 24 | Extension cords and connectors: no damaged insulation or outer jacket | ✓ | X | ✓ | ✓ | ✓ |
| 25 | Terminals and connectors not loose; no signs of overheating or discoloration | ✓ | ✓ | ✓ | ✓ | ✓ |
| 26 | Cords not run across vehicle routes, through water, or over sharp edges | ✓ | ✓ | ✓ | ✓ | ✓ |
| 27 | Panel cover and doors closed; unused outlets covered | ✓ | ✓ | ✓ | ✓ | ✓ |
| 28 | Not connected to building wiring unless through a transfer switch (no backfeeding) | ✓ | ✓ | ✓ | ✓ | ✓ |
| 29 | ■ After start-up | |||||
| 30 | No abnormal noise, vibration, smell, or smoke | ✓ | ✓ | ✓ | ✓ | ✓ |
| 31 | Exhaust color normal (no white or black smoke) | ✓ | ✓ | ✓ | ✓ | ✓ |
| 32 | Output voltage and frequency within rated range | ✓ | ✓ | ✓ | ✓ | ✓ |
| 33 | Oil pressure, coolant temperature, and charge warning lights off | ✓ | ✓ | ✓ | ✓ | ✓ |
| 34 | No fuel, oil, or coolant leaks anywhere | ✓ | ✓ | ✓ | ✓ | ✓ |
| 35 | ■ Monthly (once a month; mark the column for the day it was done) | |||||
| 36 | Battery: electrolyte level, terminal corrosion, state of charge | ✓ | ✓ | ✓ | ✓ | ✓ |
| 37 | Fuel filter and oil filter: dirt and replacement due date | ✓ | ✓ | ✓ | ✓ | ✓ |
| 38 | Insulation resistance test (write the reading in the notes) | N/A | N/A | N/A | N/A | ✓ |
| 39 | Ground rod driven in and secure; ground resistance measured | N/A | N/A | N/A | N/A | ✓ |
| 40 | Run hours recorded; parts due at next service checked | ✓ | ✓ | ✓ | ✓ | ✓ |
| 41 | Inspected by (initials) | JD | JD | MS | JD | JD |
| 42 | Person in charge (initials) | |||||
| 43 | GC check (initials) | |||||
| 44 | ||||||
| 45 | Defect record (fill in every time you mark a defect. Fill left to right in the order things happened. "Condition found" is written by the person who found it, "Corrective action" by the person who fixed it, "Verified by" by the person who checked it.) | |||||
| 46 | Date / item | Condition found | ||||
| 47 | 9/2 Three-phase cord | Outer jacket torn on one cord | ||||
| 48 | 9/4 GFCI | Breaker does not trip with the test button | ||||
| 49 | 9/5 Monthly checks | Insulation 5.2 megohm (120 V circuit, 500 V tester). Ground 78 ohm. No drop from last month | ||||
| 50 | ||||||
| 51 | ||||||
| 52 | Reviewed by (supervisor) | |||||
| 53 | ||||||
| 54 | ||||||
| 55 | Notice: This is a general-purpose inspection record. It is not an official government form and does not by itself show compliance with OSHA or any other regulation or standard. | |||||
| 56 | Which inspections you need, how often, and how long to keep records depend on your equipment, industry, and location. Check the regulations that apply to you, the manufacturer's instructions, and a qualified person. | |||||
| 57 | Worker Library accepts no liability for any loss arising from the use of this template. Regulations change; check the source page for the latest version. | |||||
| 58 | Worker Library https://worker-library.com/templates/generator-inspection-checklist/ Updated 2026-10-21 | |||||
This preview shows the first 6 of 33 columns. The downloaded file contains everything.
| A | B | C | D | E | F | |
|---|---|---|---|---|---|---|
| 1 | Portable Generator Inspection Checklist (Daily and Monthly) | |||||
| 2 | Unit | Unit ID | ||||
| 3 | ||||||
| 4 | Inspection item | 1 | 2 | 3 | 4 | 5 |
| 5 | ■ Before start: setup and surroundings | |||||
| 6 | Set level; not sinking, tilted, or rocking | |||||
| 7 | Exhaust not pointed at people, flammables, or openings | |||||
| 8 | No fuel, rags, lumber, or other flammables around the unit | |||||
| 9 | Protected from rain, standing water, and flooding | |||||
| 10 | Fire extinguisher within reach and inspected | |||||
| 11 | Not running inside a building, tent, trench, or other enclosed or partly enclosed space; exhaust away from doors, windows, and air intakes (carbon monoxide) | |||||
| 12 | Rated output and name of the person in charge posted on the unit | |||||
| 13 | Repairs to last defect (X) completed | |||||
| 14 | ■ Before start: fuel, oil, and cooling | |||||
| 15 | Enough fuel; no fuel leaks or seepage | |||||
| 16 | Engine oil between the marks; no oil leaks | |||||
| 17 | Coolant level; radiator not clogged or leaking (water-cooled) | |||||
| 18 | Fan belt tension, wear, and cracks | |||||
| 19 | Air cleaner not clogged or dirty | |||||
| 20 | Refuel only with the engine off and cool | |||||
| 21 | ■ Before start: electrical | |||||
| 22 | GFCI or ground-fault breaker trips with the test button | |||||
| 23 | Grounding conductor not broken; ground rod not loose or pulled up | |||||
| 24 | Extension cords and connectors: no damaged insulation or outer jacket | |||||
| 25 | Terminals and connectors not loose; no signs of overheating or discoloration | |||||
| 26 | Cords not run across vehicle routes, through water, or over sharp edges | |||||
| 27 | Panel cover and doors closed; unused outlets covered | |||||
| 28 | Not connected to building wiring unless through a transfer switch (no backfeeding) | |||||
| 29 | ■ After start-up | |||||
| 30 | No abnormal noise, vibration, smell, or smoke | |||||
| 31 | Exhaust color normal (no white or black smoke) | |||||
| 32 | Output voltage and frequency within rated range | |||||
| 33 | Oil pressure, coolant temperature, and charge warning lights off | |||||
| 34 | No fuel, oil, or coolant leaks anywhere | |||||
| 35 | ■ Monthly (once a month; mark the column for the day it was done) | |||||
| 36 | Battery: electrolyte level, terminal corrosion, state of charge | |||||
| 37 | Fuel filter and oil filter: dirt and replacement due date | |||||
| 38 | Insulation resistance test (write the reading in the notes) | |||||
| 39 | Ground rod driven in and secure; ground resistance measured | |||||
| 40 | Run hours recorded; parts due at next service checked | |||||
| 41 | Inspected by (initials) | |||||
| 42 | Person in charge (initials) | |||||
| 43 | GC check (initials) | |||||
| 44 | ||||||
| 45 | Defect record (fill in every time you mark a defect. Fill left to right in the order things happened. "Condition found" is written by the person who found it, "Corrective action" by the person who fixed it, "Verified by" by the person who checked it.) | |||||
| 46 | Date / item | Condition found | ||||
| 47 | ||||||
| 48 | ||||||
| 49 | ||||||
| 50 | ||||||
| 51 | Reviewed by (supervisor) | |||||
| 52 | ||||||
| 53 | ||||||
| 54 | Notice: This is a general-purpose inspection record. It is not an official government form and does not by itself show compliance with OSHA or any other regulation or standard. | |||||
| 55 | Which inspections you need, how often, and how long to keep records depend on your equipment, industry, and location. Check the regulations that apply to you, the manufacturer's instructions, and a qualified person. | |||||
| 56 | Worker Library accepts no liability for any loss arising from the use of this template. Regulations change; check the source page for the latest version. | |||||
| 57 | Worker Library https://worker-library.com/templates/generator-inspection-checklist/ Updated 2026-10-21 | |||||
This preview shows the first 6 of 33 columns. The downloaded file contains everything.
Cells marked ▼ have a drop-down list. Lightly shaded rows are where you write.
File details
| Format | Excel (.xlsx) |
|---|---|
| Works with | Microsoft Excel 2016 or later, Excel for Microsoft 365, Google Sheets, LibreOffice Calc |
| Paper | Print areas set for US Letter |
| Sheets | Instructions / Entry Sheet / Sample (Filled In) / Print (Letter) |
| Macros | None |
| File size | About 28 KB |
| Updated | 2026-10-21 |
How to use the generator inspection checklist
- Fill in the unit ID, type, output, and location at the top. Rental units change each month, so do not leave this blank.
- Before starting, check setup, fuel and oil, and electrical. Pick ✓ for OK, X for a defect, or N/A for an item that does not apply that day.
- Press the GFCI test button and confirm it trips. If any electrical item is X, do not use the generator until it is repaired or replaced.
- After start-up, check noise, exhaust color, output voltage, warning lights, and leaks. These cannot be seen with the engine off.
- Once a month, do the monthly rows in the column for that day, and write the insulation and ground resistance readings in the notes so you can compare month to month.
Adapting it to your site
- For a welder-generator, add rows for the welding leads, electrode holder, and work clamp.
- For several units, copy the sheet once per generator.
- To track fuel added, split the notes column and add a "Fuel added (gal)" column.
- To log output voltage and frequency as numbers, clear the data validation on those cells.
- Mark N/A, or delete the row, for items that do not apply to your unit.
Before you use it
Please read
- This is a general job-site template, not an official OSHA form, and it is not for permanently installed standby or emergency generators, which have their own inspection programs.
- Generator exhaust contains carbon monoxide. Do not run a generator indoors or in enclosed or partly enclosed spaces, and keep it away from doors, windows, and air intakes. Follow the manufacturer's manual.
- Whether the generator frame must be grounded depends on the unit and how it is used. Follow the manufacturer's manual and ask a qualified electrician.
- Fuel storage may be limited by fire codes and your site rules. Check the rules that apply to your site.
- This template is provided as-is for reference. Worker Library is not liable for any loss arising from its use. Regulations change, so check the update date on this page.
Generator Inspection Checklist FAQ
How often should a portable generator be inspected?
Many contractors check a job-site generator every day before use and again right after start-up, with a monthly check of the battery, filters, and insulation and ground readings. Service intervals for oil and filters are in the manufacturer's manual.
Can I use this for a standby or emergency generator?
No. A permanently installed standby or emergency generator has its own inspection and testing program, often set by the fire code and the manufacturer. This template is for portable units brought to a site.
Do I need to ground a portable generator?
It depends on the unit and how it is connected. Follow the manufacturer's manual and ask a qualified electrician.
What should a generator inspection checklist include?
Setup and location, fuel and oil, coolant and belts, GFCI and grounding, cords, a running check of voltage and warning lights, and monthly battery and filter checks. This template has 31 checks in those groups.
Who should do the daily generator check?
Usually the person in charge of temporary power on the site, or a trained operator. Electrical repairs should be done by a qualified electrician.