8-10kVA Generators Generators

An 8 to 10kVA generator runs most of a house, a busy worksite or an off-grid system. This range covers petrol, diesel, gas and inverter models from Maxwatt, Pramac, Kubota, Gentech, Generac and more, in portable, enclosed and standby designs. Check your load with the Power Calculator or call 1300 622 436.

8-10kVA Generators Generators
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What a 10kVA generator will run

At a power factor of 0.8, a 10kVA generator delivers around 8kW of usable power. That covers household essentials plus some air conditioning, or tools, compressors and lighting on site. Go by each model's rated (continuous) output rather than the maximum, and allow for start-up surges from motors and compressors.

Petrol, diesel or gas

  • Petrol: lighter and lower cost upfront. Suits occasional use and site work.
  • Diesel: longer run times on a tank and lower running costs. The choice for frequent or extended use, including enclosed and low-boy models for quieter running.
  • Gas: standby generators such as the Generac home backup range run on LP or natural gas and, with an automatic transfer switch, start themselves when the power goes.

Inverter models

Larger inverter generators give clean power for electronics, with lower noise and fuel use at light load. Several models in this range have 2-wire auto start, so they can start automatically to back up an off-grid solar system.

Single-phase or three-phase

Most 8 to 10kVA generators are single-phase 240V. A few models also have a 415V three-phase outlet for site equipment. Check the voltage in the specifications, or see three-phase generators.

Home backup at 10kVA

At home, a 10kVA generator connects through an inlet and changeover switch fitted by a licensed electrician, or through an automatic transfer switch for a standby system. We can supply and install the full system. See Home Backup Generators.

Other sizes

Step down to 6 to 8kVA, or up to three-phase sets and diesel generators.

8-10kVA Generators Generators FAQ

Frequently asked questions about 8-10kVA Generators Generators

Diesel suits long run times, heavy or continuous loads and business backup. It uses less fuel for the same output and lasts longer between services. Petrol costs less upfront and suits light, occasional use.

kVA is apparent power and kW is the usable power. For most generators, kW is about 80% of the kVA rating, so a 5kVA unit delivers roughly 4kW.

It detects a power outage and switches your site to standby power automatically, without anyone needing to act manually.

Most orders are dispatched within 1–2 business days once payment has cleared. Allow 7–10 working days for large items. Deliveries run on weekdays between 9am and 5pm, to ground level only, and someone needs to be there to sign.

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Every generator is pre-tested and set up so you can start using it the moment it arrives.

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How to find what power generator you need

The Macfarlane Generators Power Calculator helps you estimate the generator size required for your application by calculating power demand, motor starting loads, and electrical conversions such as kVA, kW, amps, and horsepower. Designed for homeowners, tradies, and industrial operators, it provides practical tools and power consumption guides to help you select the right generator with confidence. Whether you're planning backup power, construction site equipment, or large-scale operations, the calculator simplifies generator sizing and power planning.

Power Calculator Questions? Call us on 1300 622 436