You can pair most units to increase output. Many come with user-friendly features such as fuel-level indicators and smartphone apps. Cons: It's enough to power a fridge, some lights, and a phone charger, but not much else. The most expensive models cost as much as a portable generator, which can do far more. It's also efficient, capable of keeping the fridge running and the lights on for 8 to 18 hours using only 2 to 3 gallons of gas.
Cons: It can generally power only volt items with a standard two- or three-prong plug, ruling out well pumps and heating and cooling equipment. You can now find special volt transfer-switch kits, but the installation cost makes them an impractical choice because you could opt for a portable generator with a volt transfer switch for the same amount.
Certain models produce enough energy to meet all the power demands in a home. It can be connected to a breaker panel with a transfer switch to run hardwired equipment, such as a well pump. It's noisier than large inverter and home standby generators.
It usually runs only on gasoline and uses a lot of it compared with inverters. And it's bulky; most weigh close to pounds. It shouldn't be used in rain or snow without protection, such as an open-sided tent.
It can be connected to your breaker panel to run hardwired equipment, such as a well pump. It's quiet and produces steady power ideal for sensitive electronics, such as stereo equipment. And it's fuel-efficient.
Cons: It's expensive. It can power everything in a typical home simultaneously, up to its maximum output. It can be set up to run indefinitely on natural gas or can be fueled by propane. There's no need to connect cables, flip a switch, or start the engine.
This calculator is intended for estimating purposes only. We recommend having an authorized dealer analyze your specific requirements before making a purchase decision.
Every home is different, and so is every installation. The placement of the generator, the amount of materials required, and the installation of the natural gas or LP fuel source all make estimating installation costs unique. The best way to know for sure is to get a free in-home assessment. They will listen to your needs, assess your home, and give you a detailed quote. All at no charge, with no obligation, and no pressure. Note: installation cost estimate shown does not include taxes and permits.
On purchases with your Generac credit card. Monthly payments shown are required for months with 9. Additionally , you may also find our case studies helpful - here we show examples of how real customers sized the right portable generator for their needs;. Barry and Sue are about to head on a Caravan trip and want a generator to run their Caravan Air-Conditioner and also have the generator as a backup option to charge their deep-cycle batteries if needed.
They first contacted the air conditioning manufacturer who informs them that their unit requires 9. So, they converted these figures to watts by referring to the above Power Reference Table:. They purchased a Yamaha iS which produces watts at max and was able to run their caravan air conditioner comfortably. It also served as a great back up option to charge their deep-cycle batteries if needed. More often than not, the manufacturer of your caravan Air Conditioner will not know the specific start up current of the Air Conditioner.
See below:. Glen and his family live in an area prone to blackouts. Here is the summary of the power requirements:. Running all of the above at the same time means the two fridges could require a peak power demand together of watts and then you have the three other smaller appliances requiring a sum of watts. So adding those two figures we know Glen needs a generator that can deliver greater than watts at maximum and greater than watts continuously. Glen purchased the Yamaha EFiS which delivers a peak of watts and rated power of watts.
This unit is very popular for this type of application, as it also includes a long range fuel tank with up to 17 hours running time at quarter load; great for backup power at home during periods of prolonged power blackout.
Nick is a plumber and needs a trade generator to run tools on unpowered construction sites. He needs to run an air compressor and a pressure washer. The air compressor is 3. Give us a call at or schedule an appointment online. You can also check out our generator installation page to get an idea of what we offer. Generators are sized based on their electrical output, not their physical dimensions. If this happens, the generator will either automatically turn off or overheat, which will fry not only the generator, but also your costly appliances.
Step 2: Determine the starting and running wattage of everything on your list.
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