Best Large Home Standby Generators Ranked

5 air-cooled standby generators over 22 kW, for larger homes with heavy loads.

Last updated: November 1, 2026

Over 22 kW, an air-cooled standby generator can run two air conditioners, a heat pump or an electric range without shedding loads. These are the biggest units that still fit a home’s pad and price range before liquid-cooled commercial generators take over.

Prices were last checked November 1, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Full ranking 5

  1. Briggs & Stratton PowerProtect+ 26kW
    #1 of 53.3Full review

    For larger homes that want the most output and the longest full service warranty among the big brands.

    Norwall $8,069 Signature Solar $8,069
    $8,069
    26 kW24 kW67 dBA
  2. Generac 26kW Standby 7328
    #2 of 53.2Full review

    For larger homes with two air conditioners that want to run everything without load shedding.

    Amazon $7,253.10
    $7,253.10
    26 kW24 kW67 dBA
  3. Generac 24kW Standby 7326
    #3 of 53.2Full review

    For larger homes with a big air conditioner or electric range that want headroom on propane.

    Amazon $6,875.10
    $6,875.10
    24 kW22.5 kW67 dBA
  4. Generac 28kW Standby 7329
    #4 of 53.1Full review

    For big all-electric homes that want the most output Generac fits in an air-cooled cabinet.

    Amazon $8,387.10
    $8,387.10
    28 kW25 kW67 dBA
  5. Kohler 26RCAL 26kW
    #5 of 53.0Full review

    For larger homes that want the biggest Kohler air-cooled unit with automatic load shedding and full service coverage.

    Norwall $8,349
    $8,349
    26 kW24 kW67 dBA