Single Phase to Three Phase Upgrade Cost Sydney 2026

Why the price range is so wide

A three-phase upgrade isn't one job, it's several jobs bundled depending on what your property already has. If three-phase power already runs along your street and your switchboard has room for a three-phase meter, you're looking at consumer mains work, a new switchboard section, and Level 2 accredited service provider labour to reterminate the connection. If three-phase doesn't run along your street yet, the distributor, Ausgrid or Endeavour Energy depending on your suburb, needs to extend supply first, and that's a separate cost on top.

What's included in a standard upgrade

A standard conversion where three-phase already exists at the street typically covers a switchboard upgrade to accommodate three-phase circuits, new consumer mains rated for the extra capacity, and the Level 2 ASP work to reterminate at the point of connection. Each of these is priced separately by most electricians, which is part of why quotes can look wildly different, some cover everything, some leave out the network side entirely.

It's also worth asking whether the quote includes making good afterward, patching any wall or ceiling access points used during the work. Some quotes include this, some don't, and it's an easy detail to miss when you're comparing numbers side by side.

When you need a full network connection upgrade too

If three-phase isn't already available at your property boundary, your electrician needs to lodge a connection application with the distributor before any of the on-property work happens. This can add a real network fee on top of the electrical work itself, and it's the single biggest reason two quotes for what sounds like the same job can differ by thousands. Always ask directly whether three-phase already exists at the street before comparing prices.

Does upgrading to three phase affect an EV charger or solar decision

Most Sydney homes charge an EV perfectly well on single-phase with a 7kW charger. Three-phase mainly makes sense if you're running heavy equipment, multiple EVs, a large ducted system, or you're planning a bigger solar and battery setup down the track. If you're only weighing this up because of one EV charger, it's worth getting single-phase capacity checked first, it's often the cheaper and entirely sufficient answer. See our EV charger installation cost guide for what a standard single-phase install actually runs.