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Generator hookup estimator template

From an inlet and interlock to a whole-home standby generator, sized by what customers want to run instead of kilowatts. Propane tanks are flagged for a visit.

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Try it as a customer would

Steadfast Power (sample business) Sample result: Natural gas standby generator for most of the home, 25 feet from the panel, on the included pad Before tax

Standard $13,700 USD

Standby generator and automatic transfer switch installed · $12,500 Wiring and fuel line to the generator · $750 Permit and inspection · $450

Premium $15,700 USD

Standby generator and automatic transfer switch installed · $14,500 Wiring and fuel line to the generator · $750 Permit and inspection · $450

Fictional business and sample prices. Preliminary estimate based on the answers; final pricing follows an assessment.

Questions included

What kind of generator setup do you want? Portable generator hookup (inlet box and interlock) Portable generator with a transfer switch Standby generator, installed
What should the generator run during an outage? Essentials: fridge, furnace, some lights and outlets (about 10 to 14 kW) · Most of the home, including one central air unit (about 18 to 22 kW) · The whole home, including electric heat or two air conditioners (about 24 to 26 kW) “I don't know” → shows a price range
What fuel will the generator run on? Natural gas Propane
Do you already have a propane tank big enough for a generator? Yes · No, we need one “I don't know” → shows a price range
About how far from your electrical panel will it go? Measured in feet (meters also accepted) “I don't know” → uses a stated assumption
Would you like a poured concrete pad? No, the included pad is fine · Yes, a concrete pad

Prices you supply

Generator inlet box and panel interlock installed Your installed price for each package
Transfer switch and generator inlet installed Your installed price for each package
Standby generator and automatic transfer switch installed Your installed price for each package
Cable from the inlet box to your panel Your rate per foot
Wiring and fuel line to the generator Your rate per foot
Poured concrete pad A fixed extra when it applies
Permit and inspection A fixed extra when it applies
Minimum job priceNo estimate shows less (sample: $1,000)
Assessment rule: Propane tankA new or larger propane tank, set up with your propane supplier, is priced after a visit.

How the price is worked out

A standby generator has an installed price by size for each package, with the automatic transfer switch and a ready-made pad. In the sample, a generator for most of the home (about 18 to 22 kW) is $12,500 (Standard) or $14,500 (Premium). The wiring and fuel line are $30 per foot (25 feet, $750) and the permit and inspection $450. That gives $13,700 and $15,700 before tax.

A portable generator inlet box and interlock ($1,400 or $1,800) or a transfer switch ($1,900 or $2,400) uses a cable to the panel at $12 per foot, with a smaller permit fee. A poured concrete pad adds $650. If the customer doesn't know what the generator should run, the estimate shows a range from essentials only up to most of the home. A new or larger propane tank is priced after a visit while the generator is still priced.

What you can change

Installed prices for each setup and generator size, for each package.
Rates per foot, the concrete pad and the permit fee for each setup.
The distance assumed when the customer doesn't know it.
Your minimum job price and rounding.

What still needs your visit

A load check, the gas supply and where the generator can sit. The estimate shows its assumptions and says the price is preliminary.

Putting it on your website

Build, test and publish your first estimator free, for as long as you like. Unlimited estimators are $35 a month in the US or $45 CAD in Canada (pricing). Add it to your website with a short embed code, or share a hosted link.

Use this template free

Used by: electrical contractors and generator dealers.