Need More than a 20kw Generator can Provide

Need More than a 20kw Generator offers? A peek at Larger Units and Who Needs Them

Air-cooled standby generators top out at 20 kilowatts, that is a little more than 83 amperes at 240 volts. Most new homes have 200-amp service. Generally, most homes do not use the amount of power their service is capable of supplying, and seldom come close―most of the time. The truth is, most homes don’t exceed 80 amperes with the exception of short periods or when large motors on ac units or well pumps start. From the 1940s towards the 1970s, 60-ampere service was usual and 100-ampere service became common within the 1970s.

With power management features intended for most residential standby generators, together with conservative power use practices, most homes can perform comfortably on 20 kilowatts or a smaller amount of standby power.

Higher Power Requirements

Larger homes have higher power requirements. It isn’t uncommon to want 300- and 400-amp service in large homes, as well as the largest luxury homes are often provided with even larger electrical service. They have got multiple, high-capacity ac units and furnaces, along with general, larger appliances.  Power use exceeding 20 kilowatts will be the normal, everyday amount of use within these homes.

Small business owners and manufacturing facilities may also be higher users of electrical power. When it comes to larger facilities, multiple standby generators can be used to produce enough standby electrical power simply to supply emergency systems which don’t include everyday operational requirements.

Liquid Cooled Generators

Liquid-cooled standby generators use engines similar to those within cars. These people have a fan-cooled radiator filled up with coolant that’s pumped from the engine for cooling it. Because they do not count on the ambient air temperature to directly cool the engine, and because their cooling system is active instead of passive, they have got less downside to overheating and gives more reliable operation.

Standby generators of this type can be purchased with as many as 60 kilowatts of power for residential use, and larger models up to 150 kilowatts for commercial use. A capacity of 60kW can supply approximately 250 amperes of current continuously, enough to keep most luxury homes operating without judicious utilization of power.

The larger, commercial standby models will handle the requirements of most commercial facilities which enable it to supply electricity restaurants, buildings, apartments and condos, and retail facilities. Facilities which need more power can install multiple units.


For residential use, Generac Power Systems manufacturers the QuietSource distinctive line of home standby power generators. The QuietSource models can be purchased in 22, 27, 36 and 48 kilowatts, enough power for most larger and luxury homes. QuietSource generators include models in 240-volt single-phase,  208-volt three-phase, and 480-volt three-phase standby power.

Generac’s Commercial series of liquid-cooled standby generators include 22 to 150 kilowatt models for business or commercial use are available in 240, 208, or 480 volt models both in single and three-phase configurations. Models with aluminum or steel enclosures can be purchased.

Briggs & Stratton has three models intended for entire home standby power in 35, 45, and 60 kilowatts to power the largest of luxury homes during a power outage. With this sort of power available, you don’t need to forgo any of life’s necessities or conveniences.


Homes that count on high-demand electric appliances like ranges, dryers, hot water heaters, well pumps, electric heating, and central ac units might require more power than an air-cooled standby generator can supply without extensive management and careful using of power. These homeowners should look into a bigger, liquid cooled generator.

Businesses and commercial operations ought to have the reliability far better power advantages that larger, liquid-cooled standby generators can provide.

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