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Liquid-cooled home standby generators

Larger permanently installed home generators with a liquid-cooled engine, for big homes and heavy loads.

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Side-by-Side Comparison

Liquid-cooled home standby generators: every current model of the families listed here, figures from each maker's published documents
BrandModelOutput on propane (kW)Output on natural gas (kW)FuelVoltage and phaseSound level (dBA)Warranty (years)AvailabilityFamily page
GeneracProtector RG 22 kWRG022242222Liquid propane or natural gas120/240 V 1-Phase, 208/120 V or 240/120 V 3-Phase705Confirm availability with usDetails: Protector RG 22 kW
GeneracProtector RG 25 kWRG02515A2525Liquid propane or natural gas120/240 V 1-Phase, 208/120 V or 240/120 V 3-Phase725Confirm availability with usDetails: Protector RG 25 kW
GeneracXG Protector 25 kW, single-phaseXG02525AUAX2525Liquid propane or natural gas120/240 V 1-Phase595Confirm availability with usDetails: XG Protector 25 kW, single-phase
GeneracXG Protector 25 kW, three-phaseXG02525CUAX2525Liquid propane or natural gas208/240/480 V 3-Phase595Confirm availability with usDetails: XG Protector 25 kW, three-phase
GeneracProtector RG 27 kWRG027242725Liquid propane or natural gas120/240 V 1-Phase, 208/120 V or 240/120 V 3-Phase705Confirm availability with usDetails: Protector RG 27 kW
GeneracProtector RG 30 kWRG03015A3030Liquid propane or natural gas120/240 V 1-Phase, 208/120 V or 240/120 V 3-Phase735Confirm availability with usDetails: Protector RG 30 kW
GeneracXG Protector 30 kW, single-phaseXG03025AUAX3030Liquid propane or natural gas120/240 V 1-Phase595Confirm availability with usDetails: XG Protector 30 kW, single-phase
GeneracXG Protector 30 kW, three-phaseXG03025CUAX3030Liquid propane or natural gas208/240/480 V 3-Phase595Confirm availability with usDetails: XG Protector 30 kW, three-phase
GeneracXG Protector 32 kW, single-phaseXG03245ANAX3232Liquid propane or natural gas120/240 V 1-Phase665Confirm availability with usDetails: XG Protector 32 kW, single-phase
GeneracXG Protector 32 kW, three-phaseXG03245CNAX3232Liquid propane or natural gas208/240/480 V 3-Phase665Confirm availability with usDetails: XG Protector 32 kW, three-phase
GeneracXG Protector 40 kW, single-phaseXG04045ANAX4040Liquid propane or natural gas120/240 V 1-Phase665Confirm availability with usDetails: XG Protector 40 kW, single-phase
GeneracXG Protector 40 kW, three-phaseXG04045CNAX4040Liquid propane or natural gas208/240/480 V 3-Phase665Confirm availability with usDetails: XG Protector 40 kW, three-phase
GeneracXG Protector 48 kW, single-phaseXG04845ANAX4848Liquid propane or natural gas120/240 V 1-Phase585Confirm availability with usDetails: XG Protector 48 kW, single-phase
GeneracXG Protector 48 kW, three-phaseXG04845CNAX4848Liquid propane or natural gas208/240/480 V 3-Phase585Confirm availability with usDetails: XG Protector 48 kW, three-phase
GeneracXG Protector 60 kW, single-phaseXG06045ANAX6060Liquid propane or natural gas120/240 V 1-Phase645Confirm availability with usDetails: XG Protector 60 kW, single-phase
GeneracXG Protector 60 kW, three-phaseXG06045CNAX6060Liquid propane or natural gas208/240/480 V 3-Phase645Confirm availability with usDetails: XG Protector 60 kW, three-phase
GeneracXG Protector 80 kW, single-phaseXG08045ANAX7580Liquid propane or natural gas120/240 V 1-Phase645Confirm availability with usDetails: XG Protector 80 kW, single-phase
GeneracXG Protector 80 kW, three-phaseXG08045CNAX7580Liquid propane or natural gas208/240/480 V 3-Phase645Confirm availability with usDetails: XG Protector 80 kW, three-phase
GeneracProtector RG 100 kWRG10090C10096Propane or natural gas, model-specific120/240 V 1-Phase, 208/120 V, 240/120 V or 480/277 V 3-Phase715Confirm availability with usDetails: Protector RG 100 kW
GeneracProtector RG 130 kWRG13090C130130Propane or natural gas, model-specific120/240 V 1-Phase, 208/120 V, 240/120 V or 480/277 V 3-Phase725Confirm availability with usDetails: Protector RG 130 kW
GeneracProtector RG 150 kWRG15090C140150Propane or natural gas, model-specific120/240 V 1-Phase, 208/120 V, 240/120 V or 480/277 V 3-Phase775Confirm availability with usDetails: Protector RG 150 kW
KOHLER24 kW, RCL series24RCLA2421Natural gas or propane120/240 V single-phase605Listed for Canada by KOHLERDetails: 24 kW, RCL series
KOHLER30 kW, RCL series30RCLA3030Natural gas or propane120/240 V single-phase605Listed for Canada by KOHLERDetails: 30 kW, RCL series
KOHLER38 kW, RCL series38RCLC3838Natural gas or propane120/240 V single-phase605Listed for Canada by KOHLERDetails: 38 kW, RCL series
KOHLER48 kW, RCL series48RCLC4848Natural gas or propane120/240 V single-phase615Listed for Canada by KOHLERDetails: 48 kW, RCL series
KOHLER60 kW, RCL series60RCLB6058Natural gas or propane120/240 V single-phase615Listed for Canada by KOHLERDetails: 60 kW, RCL series
KOHLER150 kW, ERESC150ERESC134144Natural gas or propane120/240 V single-phase705Listed for Canada by KOHLERDetails: 150 kW, ERESC

Generac Protector: Sound level at 7 m, operating speed, no load.

KOHLER home standby generators: Sound level at 7 m (23 ft), normal operation.

Choosing Between Them

Larger permanently installed home generators with a liquid-cooled engine, for big homes and heavy loads.

A generator's natural gas rating is below its propane rating on every brand we checked: size on the fuel you will use.

Add up the running and starting watts of what you want to keep on during an outage and get an estimated generator kW band, portable or standby. Generator Sizing Estimator for Ontario Homes →

Estimate how much natural gas or propane a generator burns per hour and per day from its published consumption, and how long a propane tank lasts. Generator Fuel Use and Runtime Estimator →

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