Shopping for a generator means sorting through categories before you ever get to a specific model. Portable or standby, gasoline or propane or natural gas, air-cooled or liquid-cooled, and then a list of features that differ from one manufacturer to the next. The right answer depends on what your home needs to keep running during an outage and for how long, and in Columbia that list is shaped by summer heat, winter ice storms, and the heat pumps most homes use. This post walks through the options in the order you will encounter them, so that when a technician recommends a specific unit, you know why.
Portable or standby
A portable generator is a unit on wheels that you roll out, fuel, start, and connect when the power fails. It is the lower-cost option, and it suits households that want to keep a refrigerator, some lights, and a few devices running through a short outage. Its limits are that someone has to operate it, it needs fuel every several hours, it cannot run central heating or cooling in most homes, and it produces carbon monoxide that has to be kept well away from the house.
A standby generator is permanently installed outside the home, connected to the electrical panel through an automatic transfer switch, and fueled by natural gas or propane. It starts on its own within seconds of an outage and shuts down when utility power returns, whether or not anyone is home. It costs more, but it is the option that keeps a Columbia house cool in August and warm in an ice storm, which is why it is the option most homeowners here end up wanting once they have lived through a long outage.
Within portables: conventional and inverter
Portable generators come in two designs. Conventional portables are the familiar loud units with a large engine that runs at a constant speed. They deliver more watts per dollar and are fine for pumps, lights, and refrigerators. Inverter generators run at variable speed, are far quieter, use less fuel at low loads, and produce cleaner power that is safer for laptops, televisions, and other electronics. Many portables now run on either gasoline or propane, which matters here because gasoline is hard to find during a regional outage and goes stale in storage, while propane keeps indefinitely.
Within standbys: air-cooled and liquid-cooled
Standby generators divide by how the engine is cooled. Air-cooled units, which cover roughly 10 to 26 kilowatts, are the standard choice for most homes. They are compact, cost less, and carry a typical house including air conditioning when sized correctly. Liquid-cooled units start around 22 kilowatts and go much higher. They have a radiator like a car engine, run more quietly, tolerate long continuous runs better, and are chosen for large homes, homes with heavy electrical loads such as multiple air conditioning systems or a pool, and homes where the heat pump’s auxiliary heat strips push the load past what an air-cooled unit handles. In Columbia, the heat strip load is the factor that most often moves a home from one category to the other.
Fuel: natural gas, propane, and dual fuel
A standby generator on natural gas never needs refueling and runs as long as the gas utility does. Homes without gas service use propane from a tank on the property, which works just as well but adds the tank, the refill schedule, and the question of how many days of fuel the tank holds. Portable generators run on gasoline, propane, or both. If your home has natural gas service, that usually settles the fuel question for a standby unit. If it does not, the propane tank becomes part of the installation plan and the technician will size it for the run time you want.
Features that separate models
Once the category and fuel are settled, models differ in ways that matter over the life of the unit. Wi-Fi monitoring lets you see the generator’s status, its exercise history, and any fault codes from your phone, which is how most homeowners learn a unit needs service before an outage reveals it. Load management modules let a smaller generator run a larger home by shedding big loads such as heat strips or a second air conditioner when the unit is near capacity. Enclosure material matters in this climate; aluminum resists the corrosion that Columbia’s humidity works on steel over the years. Sound rating, measured in decibels at a set distance, matters if the unit sits near a bedroom window or a neighbor. Warranty terms range from about five years to ten depending on manufacturer and whether an extended warranty is purchased, and the availability of parts and trained service in your area matters more than any brochure feature, because a generator that cannot be serviced locally is a generator that will eventually sit idle.
What the sizing visit adds
None of the categories above tells you which unit your home needs. That comes from a load calculation, in which a technician totals the running and starting loads of the equipment in your house from the nameplates, including the heat pump and its heat strips, the water heater, the well or sump pump if you have one, and the appliances you want to keep running. The result is a kilowatt figure, and the figure narrows the field to a few models. Our generator installation consultations produce that figure and a firm price for the recommended unit, the transfer switch, and the fuel connection, and financing options are available.
Get a recommendation for your home
2nd Wind Heating & Air Conditioning installs and services standby generators across the Columbia area. If you are weighing the options, schedule a consultation online or through the 24/7 chat on our website. The technician will walk through your outage history, your household’s needs, and your equipment, and recommend a specific make and model with the reasons for it, rather than leaving you to choose from a catalog.