Electrician in Spotswood

A building that used to run machinery was very likely fed with three-phase supply, and when it was converted, that supply frequently stayed. We have opened boards in Spotswood conversions and found three active conductors sitting there behind a domestic-looking main switch.

If that applies to your building, a three-phase EV charger at $2,500 to $3,000 or more becomes straightforward, a larger solar inverter with balanced phases is possible, and heavy workshop or studio loads stop being a problem. The first step is a proper check of what is at the meter and what condition the existing distribution is in, because legacy supply is only useful if the cable and protection behind it are sound.

The Spotswood cottages were wired for a fraction of a modern load. A few lighting points, a couple of power circuits, and a stove. Now the same installation runs an induction cooktop, a dishwasher, a home office, a reverse cycle head and a car in the driveway.

The cable is often sound. The number of circuits is the constraint, and so is the board. A refit with RCBOs on every circuit starts around $800 and a full replacement with a new panel runs toward $3,500. Where original rubber-insulated cable survives on the untouched circuits, we test insulation resistance before energising anything new on it rather than assuming age alone is the problem.

Spotswood takes real weather. It is bay-adjacent, so salt reaches it, and it sits under the West Gate approach where wind and grime are constant. Outdoor equipment here shows wear faster than a sheltered inland suburb.

That is a specification issue rather than a design one. Sealed enclosures with the right IP rating, protected cable entries, corrosion-resistant fixings on anything at height, and outdoor units positioned out of the worst exposure where the block allows. On the flat warehouse and studio roofs common here, mounting and waterproofing detail matters more than on a pitched tile roof, because standing water finds any weakness.

The two building types here need opposite advice. In a cottage, adding an EV charger, an induction cooktop or a reverse cycle head usually means the board runs out of room and protection at the same time, so the board comes first and the new circuit second. A single-phase 7kW charger is $1,200 to $2,200 installed, and on a compact block with no side clearance the cable route is what moves it within that range.

In a converted building the supply is often more than adequate and the difficulty is physical. There are no cavities to run cable in, no accessible ceiling space, and frequently a concrete slab where you would like a vertical run. Surface conduit and trunking are the normal answer, installed neatly and properly supported rather than improvised, and in most of these fitouts it suits the building anyway.

A Spotswood cottage offers small original roof planes, often steep and often partly shaded by a neighbouring building. A converted warehouse offers a large flat roof with nothing on it. The same suburb, and two completely different solar designs.

On the cottages we work with the planes that exist and size the system to daytime consumption. A 6.6kW system is $4,500 to $8,500 before STCs and roughly $3,000 to $6,000 after, and a small cottage roof will often support less. On a flat warehouse roof, tilt frames set the array to a useful angle and the available area is rarely the limit, so the design question becomes consumption, export approval and whether a battery at $8,000 to $12,000 before rebates makes sense alongside it.