How to Price a Generator Installation | Reddit & LinkedIn

To price a generator installation, size the unit in kilowatts to the home load, spec the automatic transfer switch, plan the gas line and concrete pad, factor electrical and permit work, then add markup. A whole-home standby generator install runs $4,000 to $15,000, driven mostly by generator size and gas-line length.

The difference between a profitable bid and a callback that eats your Saturday is scope accuracy. Walk the job, capture photos, and write down every variable before you put a number on paper. Guessing high loses the bid. Guessing low loses the margin.

1. Size the generator. Run a load calculation to size the standby unit in kilowatts, or size for essential circuits only if the client wants a smaller unit. Sizing sets the single largest material cost.

2. Spec the transfer switch. Choose a whole-home or essential-circuit automatic transfer switch and confirm panel compatibility. The transfer switch and any subpanel work is a core labor line.

3. Plan gas, pad, and clearances. Measure the gas line run and confirm meter capacity, plan the concrete or composite pad, and check code clearances from windows and the meter. Long gas runs and upsized meters add real cost.

4. Add permit, startup, and markup. Add the electrical and gas permits, commissioning and load-bank test, then your markup. Offer a maintenance plan as a recurring add-on.

A whole-home standby generator installation runs $4,000 to $15,000 in 2026. The generator itself is $2,000 to $6,000 by size, the automatic transfer switch and electrical add $1,000 to $3,000, and gas-line and pad work add the rest. Meter upsizing and long gas runs are the surprises that eat margin if you do not scope them up front.

Once your numbers are set, speed and clarity win the job. On ContractShield you build the estimate in about 25 minutes with an AI draft ready in under a minute, then send it as a branded link the client reviews and accepts on their phone with no login. Every line shows where its price came from, so the client trusts the number and you keep control of your markup.

After acceptance, the same workspace runs the job. Tasks, photos, time tracking, change orders, and milestone invoices all live in one place, so you manage the work from the truck instead of chasing texts and email threads.

Bill on milestones so money comes in as the work progresses instead of in one lump 60 days out. ContractShield generates each milestone invoice from the accepted quote, so the numbers match and there is nothing to retype. Payments run through Stripe.

When an invoice goes past due, Collections sends a polite, then firm, then final reminder automatically, and you approve each step or let it auto-send. It recovers money you are already owed for 2% per job, 1% each side, capped at $250, with no per-lead fees, ever, with no per-lead charges and no seat fees.