Power Generators
Generator Types
For the purpose of this article we will focus on the 2 main types of generator in use for the home, traveller, tradesman, etc.
The 2 types are commonly referred to a square wave (otherwise known as modified sine wave) and Inverter or sine wave. This relates to the quality of power they output. The cheaper type of generator is the square wave, which often looks like the skid style while the more expensive type of generator is the sine wave or inverter generator.
What the heck is a sine wave or a square wave?
Power generated by the electricity authorities is known as alternating current or AC, which consists of 240 volts and a frequency of 50 hertz, which means it cycles in a sine wave form 50 times a second. One complete sine wave starts at a zero point then rises to a positive peak and drops to a negative peak before returning to zero. The diagram below show the difference as they appear on a device called an oscilloscope.
A square wave generator is fine for running electric motors in things like pumps, fridges, air compressors etc. But they can damage electronic equipment like computers, TV’s, microwave ovens, fax machines etc. this is because the electronic equipment is extremely sensitive to the wave form.
A good quality pure sine wave generator is then the answer, which is why it is so popular with travellers and home/office users as a reliable source of power.
Another advantage of sine wave generators is that they are generally much quieter.
What Size Generator
When comparing brands keep in mind how manufacturers rate their output figures, some manufacturers rate a generators output using its peak output figure, while others rate them based on their continuous output, which can confuse the buyer no end.
When choosing a generator it is advisable to over estimate your requirements than under estimate. This is especially true if you are starting electric motors which can draw a much larger current when starting as compared to normal running.
The continuous output or rated output is the figure which is most important as the peak figure is what the generator can tolerate for a minute or so while motors etc are starting.
A Yamaha 1kVA sine wave generator
To help you calculate what size generator you require, please consult the table below for a guide to commonly used appliances and their consumption. (Note: this is a guide only you should check your own appliances for accurate sizing)
EAC Supplies Specials
Yamaha EF1000iS Inverter Generator
The ultimate lightweight portable pure sine wave power generator.
$1286.00 inc. GST
Yamaha EF2400iS Inverter Generator
Yamaha EF2800i Inverter Generator
Economical inverter generator, perfect for power tools, lighting or laptops.
$1794.00 inc. GST
Yamaha EF3000iSE Inverter Generator
300W Pure Sine Wave Inverter
Laptops, recharge batteries, TV's, Fax, etc.
$385.00 inc. GST
600W Pure Sine Wave Inverter
Laptops, recharge batteries, TV's, Fax, etc.
$660.00 inc. GST
1000W Pure Sine Wave Inverter
Laptops, recharge batteries, TV's, Fax, etc.
$920.00 inc. GST