Most appliances or electrical equipment display their kilowatt (kW) rating on a data label or inside the owner’s manual. This is the best starting point when sizing a generator. If you are unsure, you can also refer to general load guides or consult a professional to calculate your total running load and any required starting currents.
(1kW = 1000W, 1kVA = 1000VA)
A simple rule of thumb is to use a 0.8 power factor for most general-purpose generators:
- Watts → VA: Watts ÷ 0.8
- Example: 1000 W ≈ 1250 VA (1.25 kVA)
- VA → Watts: VA × 0.8
- Example: 1000 VA ≈ 800 W (0.8 kW)
Running watts (or continuous watts) represent the power required to keep an appliance operating.
Starting watts are the temporary surge required for motor-driven equipment such as pumps, compressors, air conditioners, and refrigerators.
Some motors may draw up to six times their running current during startup. Failing to account for this can overload or stall your generator, so always include starting loads when sizing a generator.
Rated (continuous) wattage is the level of power a generator can safely provide around the clock.
Maximum (surge) wattage is the short-duration output available for starting motors or handling sudden load spikes.
Some larger generators may include an overload rating such as “110% for 1 hour in 12 hours,” although this is generally seen in industrial units rather than portable models.
An ATS automatically switches your premises from mains supply to generator supply when a power outage occurs.
It monitors your incoming utility power, starts the generator during an interruption, and transfers the load once generator voltage is stable. When mains power returns, the ATS switches back and shuts down the generator.
An ATS requires an electric-start generator. Manual transfer switches are also available for generators without electric start.
Yes. Routine servicing is essential for reliability and longevity. This typically includes oil and filter changes, fuel system checks, battery maintenance, and general inspection.
Portable generators not used regularly should be started and run every 6–8 weeks. If storing a unit for long periods, steps such as draining the carburettor may be required—always refer to the operator’s manual for guidance.
Inverter generators adjust engine speed based on electrical demand, making them quieter and more fuel-efficient than conventional models.
Other advantages include:
- Clean, stable power suitable for sensitive electronics
- Reduced fuel consumption
- Lighter and more compact designs
- Ability to handle temporary overloads (often up to 120% for up to 20 seconds)
- Ideal for powering equipment with heavy starting loads, such as air conditioners
- Always operate the generator outdoors in a well-ventilated area to avoid carbon monoxide poisoning.
- Protect the unit from rain and moisture but ensure airflow is not restricted.
- Never overload the generator—ensure its rating exceeds your required load.
- Never refuel while the generator is running or hot.
- Store fuel safely away from ignition sources.
- Avoid running generators on sand or dusty surfaces unless elevated to prevent ingress.
When properly maintained, a quality generator is a dependable source of backup or continuous power. Reliability depends on correct installation, appropriate sizing, and following the recommended service schedule.
Run times vary based on generator size, load demand, and fuel type. Diesel generators typically draw from an external tank, while gas and LPG units rely on piped or cylinder supply. Refer to the model’s fuel consumption figures for accurate estimates.
A well-maintained standby generator can operate effectively for 20+ years. Industrial-grade engines often last significantly longer with proper servicing.
Never “back-feed” a generator through a domestic power outlet. This is extremely dangerous and can cause electrical fires or send power back through the grid.
Always use a licensed electrician to install a compliant changeover switch or inlet socket.
If you plan to run sensitive electronics—computers, TVs, communications equipment, medical devices—look for a generator with Automatic Voltage Regulation (AVR) or inverter technology. Both provide a stable electrical output and protect devices from voltage fluctuations.
Generators should be protected from water but must not be enclosed in a way that restricts ventilation. Use approved generator canopies, covers, or enclosures that allow airflow while keeping the unit dry.
Noise levels vary by model and design. Inverter generators are generally the quietest. Noise output is measured in decibels (dB(A)). Check the specification sheet for noise ratings at 7 metres distance.
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Some inverter generators support parallel operation, allowing you to connect two compatible units using a parallel kit to increase total output. Always check model compatibility before use.
Some larger generators are able to be syncronised together but this depends on the type and model of controller fitted.
- Diesel: Best for long-running, high-load, and commercial applications.
- Petrol: Affordable and suitable for portable, occasional use.
- LPG/Natural Gas: Cleaner emissions, quieter, and ideal for standby home power systems.
All generators supplied by Ozwide Power comply with relevant AS/NZS standards for electrical safety, emissions, and performance. Always check compliance before purchasing or installing a generator.