Free Invoice Template for Generator Installers
Whole-home and portable generator invoicing with transfer-switch and propane lines.
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What is a generator installer invoice?
An generator installer invoice is the bill you send a customer AFTER the work is done. It lists every part, labor charge, and tax, and tells the customer what they owe and how to pay.
What every generator installer invoice should include
- Generator brand + kW
- ATS rating
- Fuel type + line size
- Permit + inspection
- Annual service plan
Generator installer pricing reference (US, 2026)
Common generator installer line items. National averages — adjust for your local market.
Generator installer invoice tips that get you paid faster
- Always quote with maintenance plan
- Photo every gas connection — leak test results
- Permit + inspection — never skip
- Annual service = recurring revenue
Generator installer invoice FAQ
Do I charge sales tax on generator install work?
Most US states tax parts/materials but exempt labor. Use Glo Invoice's per-line tax toggle so each generator install line item is taxed correctly. Check your state — a few (HI, NM, SD, WV) tax services too.
What size generator?
Calculate per-circuit load. 22kW typical for whole home.
Natural gas or propane?
NG = unlimited but utility dependent; LP = tank-limited but you control supply.
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