Contractor Quote Checklist
Whole House Generator Installation Quote Checklist Before Approval
Short answer: approve a whole house generator quote only after it defines the loads it will support, the transfer switch design, fuel supply work, pad and placement details, carbon monoxide safety clearances, permits and inspections, startup testing, maintenance duties, warranty terms, and every condition that would trigger extra electrical or fuel work.
A standby generator is a small power system, not just a box in the yard. The quote should show what will be powered during an outage, how the transfer switch prevents unsafe backfeed, whether fuel supply is adequate, and how the unit will be placed to reduce carbon monoxide and service-access risks.
Ready.gov advises households to plan for power outages, and CDC generator safety guidance warns about carbon monoxide risks from generator use. CPSC has also studied carbon monoxide hazards associated with stationary generators. Use those safety realities to push the quote beyond brand, size, and headline warranty.
Start With The Loads, Not The Generator Size
Ask for a load worksheet that separates essential circuits from optional comfort loads. Refrigerator, heat, well pump, sump pump, medical equipment, internet, lighting, and selected outlets may matter more than running every appliance at once.
If the proposal says whole house, ask whether that means service-rated transfer equipment for all loads, load-shedding modules, or a selected-circuit system. These designs feel different during an outage and carry different electrical work.
Confirm The Transfer Switch And Panel Work
The transfer switch should be written clearly: automatic or manual, service-rated or subpanel, amperage, location, critical-load panel if used, labeling, and inspection responsibility. Any panel relocation, breaker changes, grounding, surge protection, or utility coordination should be listed.
Do not accept a quote that leaves transfer equipment as included without naming the type. The transfer design is what keeps generator power from feeding lines or circuits in an unsafe way.
Make Fuel Supply A Separate Line Item
Natural gas and propane work can become the hidden cost. The quote should say who sizes the fuel line, whether the meter or regulator must be upgraded, where trenching or piping runs, who handles permits, and what happens if the utility or propane provider requires changes.
If propane is used, ask whether tank size, placement, delivery access, regulator changes, and startup fuel are included. If natural gas is used, ask whether generator demand has been checked against other appliances.
Review Placement And Carbon Monoxide Controls
The proposal should include a placement sketch that shows distance from openings, property lines, service access, exhaust direction, pad elevation, flood exposure, snow clearance, landscaping, and noise concerns. The safest placement is not always the shortest wiring run.
Ask whether the contractor will verify carbon monoxide detector placement and homeowner safety instructions at startup. The quote should not promise safety only through the equipment brochure; it should document site placement and final test procedures.
Whole House Generator Quote Review Table
| Quote area | What to confirm | Why it matters |
|---|---|---|
| Load plan | Essential circuits, load shedding, whole-service assumptions | Generator size should match the outage plan. |
| Transfer equipment | Automatic/manual, service-rated, subpanel, labeling | Transfer design affects safety and inspection. |
| Fuel supply | Gas line sizing, meter or regulator work, propane tank scope | Fuel limitations can stop startup testing. |
| Placement | Pad, exhaust direction, openings, access, flood and snow clearance | Placement affects safety, service, noise, and code review. |
| Aftercare | Startup test, owner training, maintenance schedule, warranty duties | Standby systems need periodic testing and maintenance. |
Questions To Ask Before Approval
- Which circuits or loads will be powered, and which will be excluded or load-shed?
- What exact transfer switch or panel design is included?
- Who sizes and permits the natural gas or propane supply?
- Does the quote include utility coordination, trenching, pad work, and restoration?
- How does the placement meet carbon monoxide, service access, flood, snow, and noise concerns?
- What startup test will prove the system carries the intended load?
- What maintenance is required to keep warranty coverage valid?
Red Flags In This Quote
The contractor quotes a generator size without a written load plan.
Fuel line or meter upgrades are left as to be determined after the deposit.
The proposal does not show a placement sketch or carbon monoxide safety assumptions.
Source Links
- Ready.gov: Power Outages
- CDC: Generator Safety Fact Sheet
- CPSC: Report On Stationary Generator Carbon Monoxide Hazard
- FTC: How To Avoid A Home Improvement Scam
FAQ
Does whole house mean every appliance runs at once?
Not necessarily. It may mean selected circuits, load shedding, or service-rated equipment. Ask the contractor to define the load plan.
Should fuel line work be included in the generator quote?
The quote should state whether gas or propane sizing, piping, meter or regulator changes, trenching, and permits are included or excluded.
Why does transfer switch type matter?
The transfer switch controls how generator power connects to the home electrical system. Type, rating, location, and labeling affect safety and inspection.
Should carbon monoxide safety appear in a standby generator quote?
Yes. Placement, exhaust direction, distance from openings, detector review, and owner instructions should be part of the written installation plan.
What should startup testing prove?
Startup testing should show transfer operation, intended load support, fuel operation, alarms, owner training, and any warranty registration steps.
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A generator quote is ready when it explains the outage plan, transfer design, fuel supply, placement safety, and startup proof before the work begins.