Look For These Features When
Buying a Portable Generator
Buying a Portable Generator
In the market for a Portable
Generator? If so, there are certain features you should look for.
If you don’t have most of those features, we hate to tell you, but you didn’t buy a good portable generator.
These features, many of which are absolutely necessary to make your powering solutions operate quietly, more
fuel efficient, less maintenance and provide you with years of service when you need it most.
Nothing is worse than experiencing a power outage and then turning to your portable generator, only to find that
it’s hard to start, runs inefficiently or God forbid, WON’T START!
Portable Generator Feature #1: Electric Start
This feature enables a generator to be easily started without having to pull a starter
Portable Generator Feature #2: Low Oil Shutdown
I would classify this feature as MANDATORY on any portable generator. It shuts the engine down
if the oil level drops below a safe operating level.
Portable Generator Feature #3: Idle Control
Automatically throttles down engine when no power is being drawn from alternator. This feature
saves fuel, cuts down on noise and reduces engine wear.
Portable Generator Feature #4: Hour Meter
This feature helps with maintenance by keeping a record of how long engine has run. Now you
can automatically schedule oil changes.
Portable Generator Feature #5: Large Fuel Tank
If your generator is used for providing backup power during power outages, get a fuel tank
with a capacity of five gallons or more. These units can run on average, seven to ten hours before
Portable Generator Feature #6: Ball Bearing Alternator
This simply amounts to a cheap generator versus a quality
generator. The alternators with the ball bearing costs more than the ones with the needle bearings but they last
Portable Generator Feature #7: Brushless Alternator Design
This feature boils down to common sense and pure economics; brushless alternators require less
maintenance and produce cleaner power, which is more suitable for today’s sensitive electronic equipment.
Brush-type generators have brushes that are wear items, requiring replacement.
Portable Generator Feature #8: All-Metal Alternator
How many times have we seen portable generators go clunk because of cheap manufacturing? More
than you ever want to know! Stay away from portable generators that have alternators with plastic housing
because they are known to warp over time and cause moving parts within the alternator to come out of alignment,
wear excessively and eventually break. Get an all-metal alternator.
Portable Generator Feature #9: Cast Iron Sleeve
If you expect to utilize your generator often or for long periods of time, this feature is
absolutely crucial! Hidden in the cylinder of some engines is a cast iron sleeve liner that reduces wear, which
makes the engine last longer, which saves you money. The added cost of a portable generator with a cast iron
sleeve in the engine is small and well worth it.
Portable Generator Feature #10: OHV (Overhead Valve) Engine
This technology is suited for portable generators because it produces fewer emissions than
side-valve (pushrod) engines, OHV engines start easier, run quieter, and they have proven to last longer.
Portable Generator Feature #11: Full Power Switch
This allows you to switch off the 240 Volt output to get more 120 Volt power from the
generator. This feature is useful for starting 120 volt electric motors on air compressors and water pumps.
Portable Generator Feature #12: Portability Kit
Some generators, although portable, seem like they weigh a ton. With a portability kit,
(wheels and handles specifically made for that generator) you can move the heavy units around with relative
Portable Generator Feature #13: Total Harmonic Distortion (THD)
Total Harmonic Distortion is a means to measure the quality of the output electricity of a
generator. Six percent THD is considered the upper limit for "clean" electricity. Go above 6% THD and the
electricity will most likely reduce the life of electrical circuits, cause microprocessors to malfunction and
cause furnace controllers to operate incorrectly. A good generator has less a THD of less than 6%. Be warned,
some generators produce a THD greater than 15%. Make sure you know what your THD is before you buy.
Portable Generator Feature #13: Brand Name
For some items, brand names won’t make that much of a difference, but when it comes to generators, brand names such
as Honda, Briggs & Stratton,
Cummins, etc., are worlds apart from
the cheap generator knock offs. You’ll save up front money when buying
a cheap generator, but on the back end (terrible fuel efficiency, loud noise, breakdowns, high maintenance, etc,)
they will cost you much more than a brand name when it’s all told.