Generators

Unfamiliar with the differences between standby generators and portable generators? Standby generators are used to offset the harmful effects of power outages and permanently installed; portable generators are used to provide power in places that don't have any. Here's a more detailed explanation.

Standby generators usually run on propane or natural gas, depending on which is available in your area. You can even get standby generators in "dual fuel" configurations that allow you to easily switch between the two. Small portable generators are most often fueled by gasoline, while large towable generators are commonly diesel powered. There are plenty of exceptions, so talk to your dealer if you have specific requirements.

The most accurate way to determine the size generator you need is to hire an electrician to measure your usage. You can also gather the power requirements from each item that will be connected to the generator, and multiply the listed amps times your voltage to get the wattage you need. You should increase your wattage number by about 20% to build in a safety margin and to account for the increased power many motors draw when they start up.

As a very loose rule of thumb, standby generators cost $300 to $500 per kW, which includes delivery, setup, connecting to your home, and the required transfer switch. Portable generators typically range from $600 (basic, gasoline-powered 5kW portable generator) to $2,500 (11kW portable generator).

Standby generators require a professional electrician for installation. In addition, they usually require installation of a concrete slab for stability. We strongly recommend that you let your dealer handle installation of your standby generator.