Generator Warranties: What's Actually Covered

Manufacturer warranty lengths

Manufacturer warranties on the generator unit itself commonly run 5 to 10 years depending on the brand, standard coverage among major brands ranges from 5 years (Generac, Cummins, Kohler) up to 7 years (Briggs & Stratton) or 10 years (Champion), each confirmed directly against that manufacturer's own published warranty terms. See our brand pages and comparison pages for how specific manufacturers compare on price, noise, and warranty length. A longer manufacturer warranty is one real, checkable data point, but it's not the only thing that matters.

Two different warranties, not one

• Manufacturer warranty: covers the generator unit itself against defects, this is set by the brand, not the installer.
• Installer workmanship warranty: covers the installation work, wiring, and setup, this is set by whoever installs it, if they offer one at all. Some installers listed here disclose their own warranty terms directly on their profile, worth checking before you commit.

A strong manufacturer warranty on the unit doesn't automatically mean the installation itself is guaranteed, those are two separate promises from two separate parties.

What to actually ask before signing

• What does the manufacturer warranty cover, and for how long.
• Does the installer offer a separate workmanship warranty, and what does it cover.
• Does required annual maintenance need to happen for the warranty to stay valid, this is common and easy to miss.
• Is the warranty transferable if you sell the home.

Get these answers in writing as part of your quote, not as a verbal assurance.