Mount Druitt and the surrounding suburbs sit in the hottest corridor of the Sydney basin, in housing that is overwhelmingly freestanding with driveway or carport parking.

That is, in battery terms, the hardest combination available in Sydney: maximum heat exposure, minimum shelter.

What heat actually does

Heat is the primary driver of lithium capacity loss — ahead of kilometres and ahead of age. A pack sitting at high temperature for extended periods degrades faster, and the effect compounds over summers rather than resetting each year.

Two specifics that matter locally:

Passively-cooled packs have no defence. The Nissan LEAF has no liquid thermal management — it can only wait for heat to leave. In this part of Sydney, that shows in the measured numbers.

High charge plus high heat is the worst case. A nickel-chemistry car left at 100% on a hot driveway is experiencing the two things that age it fastest simultaneously. On an LFP car — BYD, and Tesla's Standard Range and RWD models — a full charge is actually recommended, so the same habit reads completely differently. Establish the chemistry before you judge the habit.

The buyer's advantage

Wide variation is an opportunity if you are the one with information. In an area where individual car histories differ this much, the buyer who measures gets to pick the good one at the same price everyone else is paying for an unknown.

Where we come to

Mount Druitt, Rooty Hill, Whalan, Tregear, Lethbridge Park, Emerton, Hebersham, Bidwill, Willmot, Shalvey, Blackett, Dharruk, Minchinbury, Erskine Park and the surrounding suburbs.

Booking

Online booking is open for all Mount Druitt postcodes. $249, no travel surcharge. Phone 02 7252 1390 if you prefer.

Western Sydney · Penrith · Blacktown · Book a test — $249