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New vs Used Generator in Nigeria: What Should You Buy?

A used generator can save a large amount, but the saving only holds if the set is in sound condition. The decision turns on how many hours you will run it, how costly downtime is and how well you can inspect the unit.

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Industrial diesel generator set in an outdoor enclosure

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When New Makes Sense

The set will run long hours or serve as prime power
Downtime is expensive, such as in a hospital, factory or data centre
You want a full manufacturer warranty
You cannot inspect or test a used unit properly

When Used Makes Sense

The set is standby and runs only during outages
Budget is tight and you can inspect and load-test the unit
A well-documented set with a service history is available
You have a service provider who knows the engine

Inspect a Used Set

Running hours and how they fit the general wear
Cold start, smoke colour and oil pressure at idle and under load
Alternator output, frequency and stability under load
Leaks, rust and the condition of the control panel
Service history and the date of any overhaul

Protect Yourself

Ask for a load test on site, ideally on a load bank
Get the data plates photographed for engine and alternator
Get any warranty in writing, even a short one
Pay in stages where possible, and only after the test

Frequently Asked Questions

How many running hours is too many on a used generator?

It depends on the engine and how it was maintained. A well-serviced set can be a better buy than a lower-hour set that was neglected, so a load test and service history matter more than a number.