Three Phase Power Cost Calculator
Estimate the cost of upgrading from single to three-phase power, needed for large air conditioning, EV chargers, workshops and some solar systems. The main cost is the switchboard upgrade and the supply connection.
Your three phase power details
Your estimate sits within the typical range.
Upgrading to three-phase is worth confirming is actually needed, many homes run large loads on single-phase. The cost depends heavily on whether three-phase is already at the street or the network has to extend it.
💰 Ways to save
- Confirm you actually need three-phase, some big appliances and EV chargers run fine on single-phase.
- Check whether three-phase is already available at your street, if not, the network upgrade is the big cost.
- Do the switchboard upgrade and any new circuits in one visit.
How we estimate this
Upgrading to three-phase power in Australia typically costs around $2,500 to $5,000 in 2026 where three-phase is already available at the street, including the switchboard upgrade. If the network has to extend the supply, it can reach $8,000 to $12,000 or more.
Pricing reviewed: November 2026.
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Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding three phase power costs in Australia
Upgrading to three-phase power in Australia typically costs around $2,500 to $5,000 in 2026 where three-phase is already available at the street, including the switchboard upgrade. If the network has to extend the supply, it can reach $8,000 to $12,000 or more.
The main costs are the switchboard upgrade and connecting three-phase from the street. If three-phase is not available at your property, the network upgrade, new cabling, a transformer or pole work, is the big and variable cost.
Frequently asked questions
How much does three-phase power cost in Australia?
Roughly $2,500 to $5,000 in 2026 where three-phase is already at the street, including the switchboard upgrade. If the network must extend the supply, it can reach $8,000 to $12,000 or more.
Do I need three-phase power?
Only for large loads, big ducted air conditioning, some EV chargers, workshops with heavy machinery, or large solar systems. Many homes run fine on single-phase, so confirm the need before upgrading.
Are you a electrician?
Everyone on this page is working out what three phase power costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.