To determine the size generator you need, consider the appliances you need to power and add up their wattage, advises Misha Kollontai, the Consumer Reports engineer who handles generator testing.

Here, we offer guidance on how to choose the generator that’s right for your situation, details on each category of generator we test, and a CR recommendation and product review in each category.

Q: I plan to install a backup generator for power outages. How do I determine what size I need? Would it make economic sense to just use one all the time? A: Smaller portable or large whole-house ...

Evaluate Your Power Needs Knowing how much power you need or want to have on hand before you select a generator is key.

Read more: How to Choose Between Home Batteries and Generators Generator size rules of thumb It's hard to generalize the rules about sizing your generator, Raabe said.

A reputable generator dealer or installer should also be able to help you determine which size you need. It's probably best to speak to more than one so you can compare their answers.

A solar generator is becoming an essential purchase to any individual in need of a clean, mobile, and dependable source of energy.

House size is just one criterion for selecting a standby generator. The complexity of the home’s electrical system also plays a key role, especially if it has central air conditioning.

Russ Minick, vice president of home-generator manufacturer Generac, recommends buying a generator with at least 5,000 watts, which he says is the minimum needed to power just a refrigerator and ...