You can find a whole house generator at stores like Home Depot, Lowe's, Walmart, Sears, KMart, etc. These can be pricey depending on what type and what size that you purchase.
There are many places that will sell you a whole house generator, including online sites and stores. You will be able to check out prices and find the appropriate generator to run your entire house in case of a power failure.
The type of whole house generator you buy depends on the size of your house. As everyone owns different sized and differently shaped houses, I suggest you consult an electrician about this matter.
There are four sizes of whole house generators, and therefore the prices vary significantly. You can buy a cheap whole house generator for under $300, or for well over $1,000.
I have done a little bit of research on this, and can tell you that a whole house generator is the way to go, if you can afford it. They are hardwired into your home's electrical system, and will usually run your whole house. A single use generator is usually very noisy, and limited as to how much it can power at one time in your home.
Use a generator with a high enough rating to power the house, of course. Trying to power a house that draws 60A of current with a 10A generator is just never going to work.
Purchasing a generator in case of a power outage is a great idea. You never know when the power will go out, and whole house generators can restore needed power quickly. Generators come in various sizes, and range from small to large. Decide if you want a generator that can provide the essentials or something larger. A whole house generator should be installed by a licensed electrician to ensure the generator is installed correctly.
There has been a resurgence of interest in generators over the past few years. The only problem with many of the generators on the market these days is that many of them don't seem suitable to run the electrical needs of an entire house. You need to run a special search if you are looking for a generator to power your whole house. Something simple like "generator whole house" will likely give you tons of great results.
The size of diesel generator varies greatly. The size that is needed would depend on the size of the house.
The ETQ PG30P11 Portable Generator is a great generator and is very efficient. It will generate power for your whole house and is very helpful during a natural disaster.
I would look for a house generator at a home improvement store like lowes, or online. Online would probably be the best place to find one at a low price.
You should buy a new generator. Generators are not overly expensive, but could cost a fortune, trying to fix an old, broken generator. It is much cheaper in most cases to buy a new one.
The prices will vary depending on what size generator you need. If you are looking for one for the whole house, probably starting at 300 or 400 easily.