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Fuel-Injected Petrol Powered Inverter Generators
Operating the Generator
• Ensure that the generator is grounded (earthed) before using it.
• Allowing the generator to run when being overloaded may permanently damage the unit
and/or shorten its service life and may void product warranty.
• Ensure that any device to be powered by the generator is switched OFF before connecting it to the
generator.
• Ensure that all devices that will be powered by the generator are electrically safe and functioning normally.
If at any time a connected device appears to malfunction, stop or slow down etc, immediately switch the
generator and device OFF and disconnect the device.
• Do not exceed the rated power output of the generator. Consider the power rating for all connected
devices that will be running simultaneously, both AC and DC, and ensure that the sum of all power
consumption is no more than the generator rated output with consideration given to actual power output
based on altitude and temperature (see
will be acceptable for a 2.5kW rated output generator, however, will overload a 2kW unit.
• Do not exceed the rated current for the output socket. For example, do not connect a device that draws
15A to a 10A socket.
• If using an extension cable, ensure it is an approved type and has a minimum wire gauge of 1.5mm² up to
a cable length of 60m; 2.5mm² up to a cable length of 100m.
• For appliances that place high "inductive" loads when being started or stopped (for example, electric
motors), consideration should be given to the rated output of the generator and the required inductive load
capacity. Rated output equates to approximately 45 to 75% of inductive load capacity.
• Do not connect devices in parallel to the generator.
• Devices sensitive to input voltage fluctuation should be connected via a suitable surge protector.
Understanding Rated Output
The "rated output" is described as the maximum power that the generator can consistently and reliably
provide. The rated output of a generator is based around several factors including altitude, ambient
temperature and relative humidity. The specified rated output is calculated at an altitude of 0m, ambient
temperature of 25°C and relative humidity of 30%. Deviations from these values will affect the actual output
capacity of the generator. For example, if the generator is used at high altitude it will produce less power.
Basically the higher the altitude, the warmer the ambient temperature and the greater the humidity, the less
power can be produced. The following table provides a guideline for calculating actual generator output
based on ambient temperature and altitude [note that humidity is ignored here as it has a marginal effect]:
Altitude (m)
0
500
1000
2000
3000
4000
Examples:
•
At an approximate altitude of 1000m and 30°C ambient temperature, the power output coefficient is 0.85.
So, a rated output of 2.5kW becomes 2.5 x 0.85, which equates to an actual power output of 2.125kW.
•
At an approximate altitude of 2000m and 25°C ambient temperature, the power output coefficient is 0.75.
So, a rated output of 2.0kW becomes 2.0 x 0.75, which equates to an actual power output of 1.5kW.
Understanding the Rated
25
30
1
0.98
0.93
0.91
0.87
0.85
0.75
0.76
0.64
0.62
0.54
0.52
Output). For example, 2 x 1200W devices
Ambient Temperature (°C)
35
Power Output Coefficient
0.96
0.89
0.82
0.71
0.6
0.5
10
40
45
0.93
0.90
0.87
0.84
0.80
0.78
0.69
0.66
0.58
0.56
0.48
0.46
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