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A simple guide to choosing the right Generator for you

The first question to consider is what size generator you need for your situation. Size refers to output and is usually measured in kW or kVA meaning kilowatts or kilovolt-amps. The higher a generators output, the more appliances it can sustain at any given time. For example, the MTM Inverter Generator is a 4.4kVA portable generator that’s perfect for small/medium uses, such as with a caravan or camper. On the flip side, the Ducar LX9000 is a 10kVA generator that is better suited to powering your entire residence during a power outage.

With the latest advancements in the field of electrical engineering, generators are now available in a wide range of types & sizes. Now lets choose whether you need Single phase, Three phase, Inverter, Petrol or Diesel.

Let’s start with the phases. Single phase generators are great for 240V appliances, they can run a wide variety of items, they are simple, reliable and great value.

Three phase generators can run both 240V and 415V equipment, they are versatile and can be used in almost any application.

Inverter generators, also known as digital, use sophisticated electronics to produce an output similar to household supply. This means that sensitive electronics such as computers are well suited to these types.

Petrol or Diesel? Most small size generators are petrol powered for obvious reasons; these days petrol powered generators are quiet, reliable and produce a relatively stable output. They are well suited to the great Aussie outdoors, or when you’re on the job and some compact models even slip into the car or trailer out of sight!

Diesel powered generators are best in permanent situations or with limited portability. They are super efficient, relatively quiet and intended to run for lengthy periods.

Now let’s determine your ideal generator

In simple terms, determine which appliances, tools, devices, lighting and equipment you need to power. Most appliances/tools have their wattage stamped on the nameplate or listed in the owner’s manual. Simply add your appliance wattages together to arrive at a total figure. If you can only locate the amps, use this simple calculation: 240 volts × Amps=Watts. Now break down your appliances into 2 categories.

Inductive loads

Induction motors driving such devices as air conditioners, refrigerators, freezers, compressors, motors, pumps, etc. may well have a start-up/inrush current 3 - 4 times their continuous rating. That’s right; your generator must be up to 4 times the rated output to safely run these items. Generator under sizing is one of the most common mistakes committed by buyers. Not only does it involve the risk of damaging your new asset (the generator), but it can also damage other assets i.e. connected loads.

Resistive loads

These are loads that everyone loves, especially generators. They are incandescent lights, chargers, game consoles, the kettle, the toaster and to a certain degree, even the coffee machine and microwave. The idea is that these loads apply relatively constant power consumption to your generator and in most cases choosing a generator 1.5 times the appliances rating is more than adequate.

We should always remind ourselves that no matter what size, it’s still a generator, not a power station, hence choosing a model with 30-50% above your needs is always good advice. If you’re still unsure of your requirements, ask us or a licensed electrician.

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AGR warehouse

AGR Machinery is a proudly Australian owned and operated business. Our aim is to provide you with a fun and rewarding eBay experience.

We have endeavoured to give the most accurate description of our products, shipping, payment and warranty terms. If you are unsure of these terms, please contact us before bidding as all sales are final.

AGR Machinery - an MIT group company
Our operation is based in Sydney, NSW

Customer Service operates:
Mon - Fri 9am - 5:30pm EDST


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