Data report · Victoria
Where is electrical-work demand growing faster than wholesaler branch access? We scored every populated Victoria postcode area (474 of them) against 1,448 published branch locations using a per-capita catchment model. These are the top 5. The full Top 20 is available as a one-off report.
"Underserved" is a per-capita claim: branch access relative to the people and growth a branch would serve: a growth corridor can have a branch nearby and still be underserved. Access is shown against the state median.
Postcode area includes Fieldstone, Mambourin, Manor Lakes, Mount Cottrell
Growth signals: 600 recent dwelling approvals · 873 solar installs in the last 12 months · 333 EVs registered
Postcode area includes Chartwell, Cocoroc, Quandong, Werribee, Werribee South
Growth signals: 1,979 recent dwelling approvals · 1,398 solar installs in the last 12 months · 1,568 EVs registered
Postcode area includes Tarneit, Truganina
Growth signals: 2,292 recent dwelling approvals · 2,590 solar installs in the last 12 months · 1,402 EVs registered
Postcode area includes Bacchus Marsh, Balliang, Coimadai, Darley, Glenmore, Hopetoun Park
Growth signals: 452 recent dwelling approvals · 278 solar installs in the last 12 months · 157 EVs registered
Postcode area includes Cobblebank, Exford, Eynesbury, Melton South, Strathtulloh, Weir Views
Growth signals: 615 recent dwelling approvals · 596 solar installs in the last 12 months · 252 EVs registered
Branch access uses the Luo–Wang two-step floating catchment area method (the standard in health-service accessibility research): every published branch's capacity is shared across the population it can reach within 30 km (Gaussian distance decay), then each postcode area sums the distance-weighted capacity it can reach. Cross-border branches count, so border towns aren't falsely flagged.
Demand momentum blends percentile ranks of population-scaled dwelling approvals (ABS), solar installations over the last 12 months (Clean Energy Regulator) and EV registrations: the same open, commercially licensed signals behind our coverage intelligence. These are proxy signals of electrical-work activity, not sales data or any authority's endorsement.
Demand^0.4 × supply-gap^0.4 × population^0.2, combined geometrically so population alone can't manufacture a rank, then scored 0–100 against the state distribution. Postcode areas under 1,000 residents are suppressed for reliability.
Distances are straight-line, capacity treats every branch as one unit (no floor-space or fleet weighting), and demand is proxied, not observed. Treat the ranking as a demand-discovery input to blend with your own cost-to-serve and site criteria, not a "build here" guarantee.
Sources: ABS Census 2021 (population per postcode area), ABS building approvals (LGA, population-scaled), Clean Energy Regulator small-scale installations, state EV registration data, and the Electrical Wholesale Directory published branch dataset (1,448 branches; how we verify listing data). Report generated 2026-07-02. Top-5 data on this page is CC BY 4.0. Cite "Electrical Wholesale Directory" with a link.