I have a GE 17Kw Generator runs the whole house. It's too big to steal it and it's mounted
and bolted to a concrete slab. When the power goes off for more than 30 seconds it comes
on. This way flickering doesn't set it off.
It runs on propane and it runs once a week with no load to keep the engine oiled and
running properly.
The biggest problem with it was the install.
There is a LOT they don't tell you about. You have to buy the generator then you
have to pay for installation which is going to cost at least as much as the generator.
Then at least in my State you have to prep the site which involves digging down
at least 24" this is pretty tough in the area I live in as it's mostly ledge.
If you can do some of the work it'll save you a lot.
Then you have to contract with a propane company. Some will charge you a monthly
fee some will not, plus if you are only running the generator you will pay a higher
fee and unlike oil, you have to deal with the company who owns the tank.
I have a 500 gallon tank and they will only fill it to 80% because of expansion.
There is a lot to it although the code in some states is easier than NH.
Vermont allows them to lay the propane hose right on the uncovered ground.
No 24-36" deep trench which we needed an excavator for.
It's worth having, just be aware of the hidden costs. Oh and the company
wants $250 for a yearly checkup and oil change to keep the warranty valid.
We tried a local shop but they were jerks so we went with a Home Depot
vendor and they did a great job. Plus we have a remote that tells you if the unit
is working ok or not.