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Buying Guides02 September 2026 7 min read

Best Generator for Home Backup Power in Australia

Automatic standby or portable? Diesel or inverter? Here's how to choose the right home backup generator for Australia.

By Hanson Hire

Best Generator for Home Backup Power in Australia

Quick Answer

The best generator for home backup in Australia is a 6-11kVA diesel standby unit with an auto transfer switch, like the Hyundai DHY9KSEM 11kVA or Kubota SQ1120. For portable backup without wiring, a 6-8kVA inverter or portable diesel like the Honda EU70is or Hyundai DHY6000SE runs essentials. Size to your essential load, not your whole house.

What Makes a Good Home Backup Generator

A home backup generator needs to do one thing reliably: keep your essentials running when the grid goes down. In Australia, that usually means a 6-11kVA unit - enough for a fridge, lights, TV, modem, some power points and a small air conditioner. The two questions that decide everything are:

  1. Do you want it to start automatically? If yes, you need a standby generator with an ATS.
  2. Do you want to move it around? If yes, a portable generator you plug in manually.

Option 1: Automatic Standby (Diesel + ATS)

A standby diesel generator is permanently installed and wired to your switchboard via an ATS (auto transfer switch). When mains power drops, the ATS starts the generator and switches your house to it - automatically, even if you are not home. When mains returns, it switches back and shuts down.

Best for: homes in areas with frequent outages, people who travel, anyone with medical equipment or a chest freezer.

Top picks:

Option 2: Portable Backup (Manual)

A portable generator you wheel out, start, and run a lead or inlet to your switchboard. Cheaper and no installation, but you have to be home to start it.

Top picks:

How to Size a Home Backup Generator

  1. List your essential loads (fridge, lights, modem, TV, freezer, medical equipment)
  2. Add their running watts, plus a buffer for startup surges (fridges surge 3x)
  3. Add 25% headroom

Most Australian homes need 6-8kVA for essentials or 10-14kVA for most of the house. Use our generator size calculator for a quick estimate, or get a quote and we will size it for you.

Diesel vs Petrol for Home Backup

  • Diesel - longer running, less fuel per hour, safer fuel storage, lasts longer. Best for standby.
  • Petrol inverter - quieter, lighter, cleaner power for electronics. Best for occasional portable use.

Browse all generators for sale or read our diesel vs petrol vs inverter guide.

Frequently Asked Questions

Common Questions

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Written by

Hanson Hire

Melbourne's trusted generator hire, sales and complete power services. ABN 56 684 753 875.

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