Does your power go out every time we have a thunderstorm?
Your home needs juice, and a generator is there to either provide full power or auxiliary power when your city's electric network goes down. Keeping that in mind, there is a wide variety of generators available, depending on your home's needs.
What you want to do is install a high-quality generator which can cover your entire home. This means that, the more juice your home consumes, the more powerful your generator needs to be. You also need to take good care of price-per-quality ratio, because not all generators on the market will provide you for the equal amount of time, or equally reliable. In order to suit the load under which the generator will work, you need to have an optimal rate of frequency, power and voltage.
On top of that, it is important that you let an expert do this. Not only do you need to acquire it from an authorized generator dealer, you need to hire a qualified electrician to do the hard work as well. They will also know more about the information mentioned above. The dealer will be able to deliver your product to your home, as well as provide useful information on an optimal placement location. While the latter can also be done by a qualified electrician, you also need one to install it into that location properly, as well as recommend (or even provide) a decent fuel source and appliances. An auxiliary generator will also require a transfer switch.
When choosing a generator, it is important to know whether you need a stand-alone generator or an auxiliary power source. A stand-alone generator, also known as a home energy station by some manufacturers, will provide your home with electricity independently of your local power plant. On the other hand, an auxiliary generator, also known as a standby or backup generator by some manufacturers, will provide your home with power during an outage. Your electrician will also need to connect the generator to a fuel source, be it gas (plumber, propane, etc.) or otherwise -you need to check with your local gas company.
To conclude, in order to install a generator to your home, you need to take care of its quality, the load it can take, the purpose you need it for, and most importantly, your own safety.