You need to decide if you want a diesel or gas generator. There are some
that run on other fuels, but diesel and gasoline are readily available
and are the post popular. The both make the same electricity, but there
are a few differences.
This first section will deal with portable or semi-portable generators.
Are you going to use your generator for a backup power supply mainly, or
are you going to use it frequently or on a day to day basis?
Gasoline generators are generally cheaper to buy. This may be a deciding
factor for you. But they do require more maintenance. You will have to
change the oil, filter, and spark plugs. This could lead to a higher
overall cost during the life of the generator. Gasoline generators are
not usually as fuel efficient as a diesel one. But fuel prices
fluctuate. If diesel fuel is more expensive, the fuel efficiency won't
matter as much. If you use a generator only occasionally, and for a
backup power supply, a gasoline generator might well be the way to go.
Diesel generators do tend to cost more. However, as stated above, they
are more fuel efficient. They also require little maintenance. Not
nearly as much as gasoline. Diesel engines run at lower speeds, so they
will last a little longer. They require no spark plugs. If you use your
generator on a day to day basis, such as on a job site, you will
probably want to go for a diesel.
If you are looking at a stand alone (stand by) permanently placed
generator, you will probably want to choose propane. Because they are
refilled with tanks, there is little danger in refueling and storing
fuel. Propane in the long run is cheaper than gasoline or diesel.