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A home can have three-phase supply even if every appliance uses single phase. Confirm the connection before choosing the equipment you want to add.
A clear answer. Without the guesswork.
Start with whichever option is easiest to use safely. These are alternatives, not a checklist of electrical tasks.
Take a clear photo.
Enlarge photoA photo of the visible switchboard and meter face can help your electricity retailer or licensed electrical contractor check the supply information, arrangement and apparent space for new equipment.
Take it from a safe, accessible position with all equipment covers in place. Keep a clear view of the meter face and the whole switchboard. A site assessment may still be needed to confirm details that a photo cannot establish.
Ask AI to read the label.
A clear photo can help an AI tool read a visible marking. Hide meter numbers, barcodes, address labels and other personal details before uploading it.
Treat the answer as a clue. Your electricity retailer or a licensed electrical contractor still needs to confirm the connected supply before equipment is selected.
Ask your electricity retailer.
Use the contact details on your electricity bill. Ask them to confirm whether the property has single-phase, three-phase or another supply arrangement.
If the records do not settle it, arrange an assessment with a licensed electrical contractor. A strata manager may also help with access to a shared meter area.
Read the visible meter label.
Look for phase wording on the electricity meter, rather than a solar inverter or battery display. Compare the markings below; layouts vary. If the label is unclear, leave the supply unconfirmed.
A single-phase meter label.
1P, 2W (one phase, two wire) is the phase marking on this meter. Keep a photo of the full face so your retailer or a licensed electrical contractor can check its model and supply details.
Other wording: Single Phase · 1 Phase · 1 PH.
Layouts vary. Model numbers, voltage markings and breaker counts do not confirm the connected supply.
One phase. Three phases.
Single phase brings one supply phase to the property. Three phase brings three. In a three-phase home, ordinary single-phase circuits can be spread across those phases, while suitable equipment can use all three.
Single phase
Solar, a battery and EV charging can all be possible. The available capacity and the equipment chosen determine what can run together.
Three phase
Loads can be distributed across phases, and suitable three-phase equipment can be used. Each phase still has a limit of its own.
Phase count is not a measure of electricity use or a guarantee of spare capacity. Your connection, switchboard and existing loads all need to be considered.
Clues. Not confirmation.
You may have seen advice to count switches or check an air-conditioner label. Those observations can help an electrician, but they are easy to misread on their own.
Main switch
A linked multi-pole main switch can be a clue to the supply arrangement. A row of ordinary circuit breakers is a different thing. Width, position or the number of visible handles alone is not a reliable way to confirm your supply.
Do not move switches or remove a cover to investigate. If safe, a clear photo can help PSW understand the arrangement.
Service fuses
One or three visible service fuses may seem like an easy answer. Installations can differ, including split-phase and shared arrangements, so counting fuse equipment alone can be misleading.
Leave service fuses and their enclosures untouched. There is no need to access them to use this guide.
Appliance labels
A three-phase air conditioner or workshop machine is useful information for the installer. Its nameplate describes that appliance, rather than confirming every aspect of the property’s supply.
A large air conditioner, solar array or home battery does not by itself establish the supply type. Share a safely visible model label if you already have one.
Solar, batteries and EV charging.
The supply affects which inverter, battery and charger can be installed. Available capacity, existing loads and local approvals need to be checked alongside it.
Solar and inverters
Inverter output, phase balance and approved export limits need to suit the connection. Panel capacity is a separate figure. More phases do not automatically mean unrestricted solar export.
Battery backup
A three-phase home does not automatically have three-phase blackout protection. The battery, inverter, changeover equipment and selected circuits determine what stays on.
Read the backup guideEV charging
Charging speed depends on the supply, spare capacity, charger and the car’s onboard AC charger. A three-phase connection alone does not guarantee the advertised maximum rate.
A photo helps. An assessment confirms.
In Western Australia, PSW assesses the point of supply alongside the equipment you want to add. The relevant network service provider, such as Western Power or Horizon Power, and your retailer set the connection and approval requirements. An appliance label cannot settle those checks.
Outside Western Australia, ask your electricity retailer or a licensed electrical contractor to confirm the connection. Meter designs and confirmation processes vary between networks and countries.
Sources and checks
Reviewed 9 November 2026. This guide helps you recognise supply information; it is not an electrical inspection or a connection approval.