Three-Phase Outlets in Melbourne
Three-phase power for homes — when single-phase is not enough, we install the supply, the wiring and the outlet.
Three-Phase Power
Most Melbourne homes are connected to single-phase (240V) power. Three-phase power delivers three separate electrical cycles, providing higher capacity and smoother power for demanding equipment:
- Higher current capacity – three-phase can deliver up to 3× the power of single-phase
- Smoother operation – motors and compressors run more quietly and efficiently on three-phase
- Future-proofing – if you plan to add multiple high-power appliances, three-phase gives you the headroom
When Domestic Needs Three-Phase
Three-phase is uncommon in homes but necessary for:
- Large heat pumps – ducted heat pumps over 10kW often require three-phase
- EV chargers – fast home charging (7.4kW+) benefits from three-phase supply
- Workshop machinery – lathes, milling machines and industrial welders often require three-phase motors
- Pools with large pumps – commercial-grade pool pumps and heating systems may need three-phase
- Solar inverter systems – larger solar arrays (10kW+) often connect to three-phase switchboards
EV Charger Compatibility
EV chargers are the most common reason homeowners upgrade to three-phase:
- Single-phase charging – most home chargers run on single-phase at 7.2–7.4kW (32A)
- Three-phase charging – some vehicles accept three-phase input at 11kW or 22kW, cutting charge times significantly
- Future-proofing – even if your current car only charges on single-phase, three-phase gives you the option for faster charging later
Not all EVs can charge on three-phase — we check your vehicle's compatibility before recommending the upgrade.
What to Expect
Frequently Asked Questions
Does my property already have three-phase?
Many modern homes do — check your switchboard. If you see three main incoming cables (plus neutral and earth), you likely have three-phase. If you see only one incoming cable, you have single-phase. We can confirm during the assessment.
How much does a three-phase upgrade cost?
Cost depends on whether three-phase is already available at your property. If it is, we only need to upgrade the switchboard and wiring. If it is not, the DSO charges apply (typically $500–$2000 depending on the provider and location). We provide a full quote before any work starts.
Can I use single-phase appliances on a three-phase switchboard?
Yes — a three-phase switchboard can power both single-phase and three-phase circuits. Your standard outlets and lighting remain on single-phase, while high-power appliances use three-phase.
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