Kits that come with an automatic transfer switch, so the price covers everything but the install.
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.
Best Standby Generators with a Transfer Switch: Under 15 kW
- Champion 12.5kW Home Standby#1 of 7Full review
For homes that want essentials backed up automatically at a low price and a long parts warranty.
Norwall $4,199$4,19912.5 kW11 kW63 dBA - Champion 14kW aXis#2 of 7Full review
For budget buyers who want a whole-house switch and a long warranty for essentials and a small air conditioner.
Norwall $4,999$4,99914 kW12.5 kW62 dBA - Champion 8.5kW Home Standby#3 of 7Full review
For small homes or cabins that need a few essential circuits backed up automatically on a tight budget.
Norwall $3,299$3,2998.5 kW7.5 kW59.5 dBA - Generac 10kW Standby 7321#4 of 7Full review
For smaller homes that only need the fridge, furnace, well pump and lights during an outage, at a low price.
Amazon $3,896.10$3,896.1010 kW9 kW61 dBA - Generac 14kW Standby 7323#5 of 7Full review
For homes that want essentials and a small air conditioner covered, with Generac’s cellular monitoring.
Amazon $5,255.10$5,255.1014 kW14 kW65 dBA - Cummins Quiet Connect RS13A 13kW#6 of 7Full review
For homes on natural gas that want essentials covered by a quiet, well supported brand with monitoring included.
Norwall $5,384.39$5,384.3913 kW13 kW65 dBA - Kohler 14RCAL 14kW#7 of 7Full review
For homes that want essentials plus one air conditioner managed automatically, with a full parts and labor warranty.
Norwall $5,899$5,89914 kW12 kW69 dBA
Best Standby Generators with a Transfer Switch: 15 to 22 kW
- Champion 22kW aXis#1 of 9Full review
For homes with central air that want whole-house backup for the least money and a long parts warranty.
Norwall $5,699$5,69922 kW19.8 kW67 dBA - Champion 22kW fleX#2 of 9Full review
For coastal or wet climates that want Champion’s 22 kW and long warranty in a rust-proof aluminum housing.
Amazon $6,399$6,39922 kW19.8 kW67 dBA - Briggs & Stratton PowerProtect+ 22kW#3 of 9Full review
For homes with central air on natural gas that want full output, built-in monitoring and seven years of full cover.
Norwall $7,289 Signature Solar $7,289$7,28922 kW22 kW66 dBA - Generac 22kW Standby 7325#4 of 9Full review
For typical homes with central air that want the best known brand and a whole-house switch in the box.
Amazon $6,506.10$6,506.1022 kW21 kW67 dBA - Generac 18kW Standby 7324#5 of 9Full review
For average homes with one central air conditioner that want a whole-house switch included.
Amazon $5,975.10$5,975.1018 kW17 kW65 dBA - Cummins Quiet Connect RS20AC 20kW#6 of 9Full review
For homes with central air that want a quiet 20 kW unit with monitoring included and a service-entrance switch in the box.
Norwall $6,662.42$6,662.4220 kW18 kW65 dBA - Briggs & Stratton PowerProtect+ 18kW#7 of 9Full review
For average homes on natural gas that want full rated output and a long warranty with service included.
Norwall $6,899$6,89918 kW18 kW66 dBA - Cummins Quiet Connect RS17A 17kW#8 of 9Full review
For average homes on natural gas that want full rated output and built-in monitoring from a commercial power brand.
Norwall $6,264.97$6,264.9717 kW17 kW65 dBA - Kohler 20RCAL 20kW#9 of 9Full review
For average homes with central air that want load management in the box and Kohler’s full coverage warranty.
Norwall $6,848$6,84820 kW18 kW70 dBA
Best Standby Generators with a Transfer Switch: Over 22 kW
- Briggs & Stratton PowerProtect+ 26kW#1 of 5Full 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$8,06926 kW24 kW67 dBA - Generac 26kW Standby 7328#2 of 5Full review
For larger homes with two air conditioners that want to run everything without load shedding.
Amazon $7,253.10$7,253.1026 kW24 kW67 dBA - Generac 24kW Standby 7326#3 of 5Full review
For larger homes with a big air conditioner or electric range that want headroom on propane.
Amazon $6,875.10$6,875.1024 kW22.5 kW67 dBA - Generac 28kW Standby 7329#4 of 5Full review
For big all-electric homes that want the most output Generac fits in an air-cooled cabinet.
Amazon $8,387.10$8,387.1028 kW25 kW67 dBA - Kohler 26RCAL 26kW#5 of 5Full review
For larger homes that want the biggest Kohler air-cooled unit with automatic load shedding and full service coverage.
Norwall $8,349$8,34926 kW24 kW67 dBA