EV Charger Installation in Altona Meadows

A charger drawing 32A continuously is a different animal to a lighting circuit. Over a long run, voltage drop has to stay inside the limits in AS/NZS 3000, and the fix for a long run is a bigger cable. On a fifteen metre run we might use one size. On a twenty five metre run around the back of a detached garage, we go up a size, and the cable itself becomes a real line on the invoice.

The good news is that Meadows blocks almost always have a clean route. Cavity brick with accessible roof space, eaves the whole way, and a side path that is not built out. We can usually get from board to garage without cutting a single finished wall, which is not true in Footscray or Yarraville.

Boards of this vintage usually have miniature circuit breakers rather than rewireable fuses, which is a good start. What they often do not have is RCD protection on every final subcircuit. Adding a new EV circuit means that circuit gets RCD protection with the correct DC leakage detection, and it is normally the right moment to bring the rest of the board up to current standard.

The other check is spare capacity. A lot of Meadows homes already run a ducted system, an electric oven and a pool or spa pump. Adding 32A of continuous load on top can push the demand past what the main switch and consumer mains were sized for. Where it does, a load management device at $200 to $600 is far cheaper than a supply upgrade.

Altona Meadows has some of the best solar roof space in the west. Large single storey tiled roofs, mostly unshaded, with good north and west faces. A lot of homes here already carry 6.6kW or 10kW arrays, and that makes a smart charger worth the extra few hundred dollars.

With a current transformer on the main supply, the charger tracks house consumption and export and puts only surplus solar into the car. On a clear day that turns exported kilowatt hours worth a few cents into kilometres you would otherwise buy. It is stop start and it needs the car to be home in daylight, so most people run solar mode on weekends and off peak scheduling on weeknights.

The Meadows is close enough to the bay and to Skeleton Creek that salt reaches outdoor equipment. It is less aggressive than Seaholme or the Altona foreshore, but it is real. Chargers mounted on an exposed western garage wall with no eave over them get weathered hard.

We use stainless fixings, coastal rated glands and, where there is a choice, a mounting position under an eave or inside the garage with the lead run out. An indoor mounted charger in an attached garage is the longest lasting arrangement available and it costs nothing extra to choose it.

The same logic applies to the isolator that sits alongside the charger. It is a smaller and cheaper item than the charger itself, and in a bayside suburb it is usually the first thing to show corrosion. Specifying a properly rated enclosure at install time costs a few dollars and saves a callout in year six.