Upgrade household supply capacity for compatible higher-power EV charging, ducted air conditioning, induction cooking and other major electrical loads. The recommended scope depends on a site load assessment, distributor requirements and your equipment. A-Grade licensed, with clear quotes before work begins.
Quick answer
A 3-phase upgrade can add capacity for a planned mix of EV charging, air conditioning, induction cooking, hot water and workshop equipment. Whether it is needed — and what it costs — depends on your existing supply, switchboard, distributor requirements, cable route and the equipment being installed. We assess those factors before recommending a scope.
Three phase can provide more usable supply capacity for a suitable combination of EV charging, air conditioning, induction cooking, hot water and other major loads.
A load assessment can account for future EVs, batteries, heat pumps and other planned upgrades without assuming every home needs the same supply arrangement.
A compatible vehicle and charger may accept up to 22 kW AC on three phase. Actual charging speed depends on the vehicle's onboard charger, charger settings and available supply capacity.
Select the equipment you have or plan to install. This gives an indicative connected-load total to help start the conversation.
Estimated peak load
0 kW
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Indicative only: this simple total does not apply electrical demand, diversity, equipment data, existing-supply limits or distributor rules. A site load assessment is required before recommending an upgrade. Request an assessment and quote.
We check your existing switchboard, meter, mains tail, and street pit. Confirm if your distributor (AusNet, Citipower, Powercor, United Energy, Jemena) already has 3-phase at the street.
Where a connection change or distributor approval is required, the applicable network process and external dependencies are identified in the scope.
The quote sets out the main-switch, protection, circuit and switchboard work required for the assessed installation.
If the assessment identifies mains or metering changes, these are coordinated with the relevant provider and shown clearly in the scope.
The completed electrical work is tested and the required Victorian electrical safety documentation is supplied for applicable work.
There is no reliable one-price answer before the existing supply and proposed loads are assessed. The quote depends on the switchboard condition, consumer mains and cable route, metering, distributor requirements, access and any specialist work.
Available capacity, board condition, protection, circuit space and the proposed electrical loads all affect the scope.
Cable length, access, metering changes, network applications and third-party charges can materially change the final quote.
Older enclosures, difficult routes and work requiring another licensed specialist are identified before the installation proceeds.
Planning several upgrades? Assessing the EV charger, air conditioning, heat-pump hot water and switchboard together can avoid conflicting scopes and repeated site work.
Households assessing three-phase charging for a compatible vehicle, charger and daily driving pattern. EV charger page →
Whole-home ducted reverse-cycle systems above 14kW capacity need 3-phase to start the compressor cleanly. Air conditioning page →
Replacing gas with induction, heat-pump hot water, electric oven and reverse-cycle heating. Single-phase often can't carry it.
Above 10kW solar, most Victorian distributors require 3-phase export. Same for whole-home batteries above 10kWh.
Welders, milling machines, lathes, commercial kitchen gear, big air compressors. We'll run a dedicated 3-phase sub-board to the workshop.
Older fuse equipment, missing RCD protection or a meter enclosure due for assessment may make it practical to coordinate switchboard and supply planning. Suspected asbestos-containing material requires appropriate specialist handling. Switchboard upgrades →
Croydon, Ringwood, Box Hill, Blackburn, Doncaster, Lilydale, Mooroolbark, Kilsyth, Bayswater, Boronia, Mitcham, Nunawading, Donvale, Warrandyte, Chirnside Park, Wantirna, Vermont, Forest Hill, Heathmont, Montrose and surrounding suburbs.
Distributors we work with: AusNet Services, CitiPower, Powercor, United Energy, Jemena.
Customer stories
Cost depends on the existing switchboard and supply, the required consumer mains and metering work, distributor requirements, cable access and the equipment being installed. We inspect those factors and provide a clear scope and quote before work begins.
Timing depends on the assessed scope, site access, equipment availability and any distributor or metering coordination. The quote explains the expected sequence and known external dependencies.
Not necessarily. Many homes use single-phase charging. Three phase may be considered for a compatible higher-power charger, multiple EVs or broader household load requirements. Charging speed depends on the vehicle, charger and available capacity. See our EV charger page.
It depends on the selected system, starting current, existing supply and the home’s other loads. The air-conditioning equipment data and a site load assessment should guide the decision. See our air conditioning page.
An upgrade does not by itself determine energy use, but retailer tariffs and supply charges can vary. Check the current terms with your electricity retailer before approving the change.
The required process depends on the existing connection and proposed change. We identify the relevant distributor or metering steps and include our coordination role in the quoted scope.
Existing and new single-phase circuits can generally remain part of a three-phase installation. Circuit allocation and any three-phase equipment connections are designed around the assessed loads and switchboard arrangement.
Not from system size alone. The inverter, export limit, existing connection and current distributor requirements all matter, so confirm the proposed solar or battery design before choosing the supply upgrade.
Applicable workmanship terms, manufacturer warranties and required electrical safety documentation are set out for the quoted equipment and scope.
They can be assessed together. Coordinating the EV charger, air conditioning, heat-pump hot water, induction and switchboard requirements helps produce one coherent load and staging plan.
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