Three-Phase Power Upgrade for EV Charging.

Upgrade Your Home to Three-Phase Power for EV Charging

Most homes in Coorparoo and the surrounding suburbs run on single-phase power. That's fine for lights, appliances and even some smaller EV chargers, but it puts a hard ceiling on how fast your electric vehicle can charge overnight. A three-phase power upgrade removes that ceiling and lets you run a full-speed AC charger, typically delivering 11 kW or 22 kW depending on your vehicle's onboard charger capacity.

This page explains what the upgrade actually involves, when you need it, and what it typically costs in Brisbane.

What the Work Actually Involves

A three-phase upgrade is a licensed electrical job from start to finish. Here's what happens on site:

• Supply authority coordination. We liaise with Energex to request a three-phase supply to your property. Not every street in inner Brisbane has three-phase available at the kerb, so this is the first thing we confirm before anything else.
• Switchboard replacement or modification. Your existing single-phase switchboard is replaced with a three-phase consumer mains board. This includes new circuit breakers, a three-phase main switch, safety switches (RCDs) on all circuits, and correct earthing to AS/NZS 3000 standards.
• New metering infrastructure. Energex typically installs or upgrades the meter at the same time. We coordinate that visit as part of the job.
• Dedicated EV charger circuit. A new circuit runs from the upgraded switchboard to your chosen charger location, usually the garage wall or carport. We install the wall-mounted charger at the same time unless you already have one waiting.
• Testing and handover. Every circuit is tested and verified. You receive a Certificate of Test, and we walk you through the charger settings before we leave.

Materials involved include the new switchboard enclosure, three-phase main switch, RCD/circuit breaker modules, heavy-duty cable from the meter to the board, and the EV charger circuit cable itself. The EV charger unit is quoted separately if you haven't chosen one yet.

When a Coorparoo Homeowner Actually Needs This

You likely need a three-phase upgrade if:

• Your EV charger or vehicle manual specifies a three-phase supply for full charging speed.
• You've asked an electrician about installing a charger and been told your single-phase supply can't support it safely without overloading your circuits.
• You're already running a ducted air conditioner, large solar inverter and other heavy loads, and adding an EV charger would push your single-phase supply close to its limits.
• You want to future-proof for a second EV or a larger battery vehicle down the track.

Not every household needs three-phase. If you drive a typical commuter EV, do modest daily kilometres and are happy with a 7 kW single-phase charger, a switchboard upgrade (rather than a full three-phase conversion) may be all you need. We'll tell you honestly which applies to your situation.

What It Typically Costs in Brisbane

A three-phase power upgrade combined with EV charger installation typically falls in the $2,500 to $4,500 range in Brisbane, depending on:

• Energex availability. If three-phase is already at the boundary of your property, costs are lower. If the supply authority needs to run a new service, that adds to the timeline and sometimes the cost.
• Switchboard size and condition. Older Queenslander-era properties in Coorparoo, Annerley and Greenslopes sometimes have ceramic fuse boards or undersized enclosures that require more work to replace.
• Cable run distance. A garage at the back of a Camp Hill or Tarragindi block costs more to cable than a front-entry carport.
• Charger unit chosen. A basic 11 kW unit costs less than a smart 22 kW charger with load management and app control.

Jobs at the lower end tend to be new builds or recently renovated homes in South Brisbane or West End where the wiring is already tidy. Jobs at the higher end are typically older detached homes with long cable runs or complicated switchboard situations.

What's Included in Our Quote (and What Isn't)

Typically included:

• Site inspection and Energex supply check
• Switchboard replacement with three-phase consumer mains board
• RCDs and circuit breakers for all circuits
• Dedicated EV charger circuit (up to a standard run length)
• Wall-mounted EV charger supply and installation
• Energex coordination and meter upgrade liaison
• Certificate of Test

Typically quoted separately or subject to variation:

• Extra cable for long runs beyond the standard allowance (flagged before we start)
• Concrete core drilling or conduit through brick or tiled walls
• Switchboard relocation if the current position doesn't suit the new supply
• Energex connection fees (these are set by Energex, not us)

We'll walk through all of this before you sign anything.

How to Tell if This Is the Right Job for Your Property

A few quick indicators: check your meter box. If you see a single large fuse or circuit breaker and one set of cables coming in from the street, you're on single-phase. If there are three separate fuses or a three-pole main switch, you may already have three-phase, and the job becomes a charger installation rather than an upgrade.

If you're not sure, just call us. We can usually tell from a couple of photos of your meter box whether a full upgrade is needed or whether a simpler solution will do.

A Note on Safety and Qualifications

Three-phase work is not DIY territory. It requires a licensed electrician in Queensland, and the switchboard work must be accompanied by a Certificate of Test issued under the Electrical Safety Act 2002. Our work is covered by public liability insurance. If you're comparing quotes, check that any electrician you consider is licensed with the Queensland Electrical Safety Office.

We cover Coorparoo, Camp Hill, Woolloongabba, Kangaroo Point, Annerley, Greenslopes, Tarragindi and surrounding suburbs in Brisbane's inner south.

If you want to know whether your street has three-phase available before committing to anything, give us a call and we can check with Energex on your behalf. It's a five-minute conversation that saves a lot of guesswork.