Things To Consider
Age, Hours of Use, Usage
One of the first things you can try and determine is the hours used, the age, and the use history of the generator. Generator engines usually have an odometer, just like a car engine, so you can find out how many hours it has on it. Many reputable dealers will only sell you a low-hour used generator, or a remanufactured one (which means they have rebuilt the engine). It would also be helpful to know how old the generator is, and how it was used (was it a prime power source or backup?). In the event that it was used as a backup power source, it could have been used less and maintained better than a generator used as a continuous power source. However, this information is not always available, which is where our next topic comes in..
History and Reputation of Manufacturer
When choosing to depend on pre-owned equipment, such as a used generator, the manufacturer’s history and reputation should play a role in your decision to buy, just as it would in buying a used car. There are many manufacturers with a long history of “generating” high quality equipment. Do your research, and go with a trusted brand, instead of an unknown, so that parts and service will be obtainable if necessary.
Is It Well-Maintained?
This is another question you might not be able to get the answer to, simply because the dealer does not know the generator’s history. A good idea would be to determine the seller’s knowledge in regards to maintaining and repairing used generators, especially if you are buying a re-manufactured machine. This is crucial since a well-maintained generator, or one that was rebuilt by certified, expert technicians, will last much longer.
Load Test
A load test is a standard test that helps determine the general efficiency of electric power generation. The electric power output the generator gives is a good indicator of the condition of the machine, as well as how well it will respond to varying loads. Most dealers will have already run the test, so ask about it. Some dealers will actually perform the test up to three times on a used generator, to make sure there are no unanticipated power malfunctions.