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LAST UPDATED: MARCH 2026 · DATA: CLEAN ENERGY REGULATOR & STATE SOURCES
Williamstown solar fact
Williamstown's heritage precinct covers 80% of residential streets — yet its progressive council has approved 98% of solar applications since 2021, making it Victoria's most solar-friendly heritage suburb
Estimated Monthly Output — 6.6kW
kWh/month · peak: Dec (456 kWh)
Solar in Williamstown — What You Need to Know
Williamstown occupies the tip of the Hobsons Bay peninsula, giving it Port Phillip Bay frontage on three sides and some of Melbourne's most photographed Victorian-era streetscapes. The suburb's heritage overlay is extensive but well-managed for solar — Hobsons Bay City Council has developed a clear solar design guide that pre-approves all-black panels on rear elevations and certain roof faces, dramatically reducing approval times. Williamstown's double-fronted Victorian and Edwardian cottages sit on modest 300–500m² lots with generally good north-facing rear roof planes, though the mature street tree canopy on Ferguson Street and Nelson Place creates shading challenges for some properties. The suburb's median household income is above the Melbourne average, and strong environmental values translate to solar take-up that punches above its planning constraints. Marine-grade components are recommended throughout Williamstown given the bay exposure on all sides.
Solar Panel Cost in Williamstown 2026
| System | Cost after STCs | Annual savings | Feed-in |
|---|---|---|---|
| 5kW | $3141–$3696 | $1680+ | 3.3c |
| 6.6kW ★ | $3696–$4956 | $2240 | 3.3c |
| 10kW | $4804–$6442 | $3136+ | 3.3c |
FAQs — Solar in Williamstown
How much do solar panels cost in Williamstown?
A 6.6kW system in Williamstown 3016 costs $3696–$4956 after federal STC rebates in 2026.
Is solar worth it in Williamstown?
Williamstown earns a B+ (Good) solar grade with a score of 74/100. 22% of homes here already have solar.
What size solar system for Williamstown?
6.6kW suits most Williamstown homes. Larger homes with pools or EVs should consider 10kW+. VIC's feed-in tariff is 3.3c.
Solar in Nearby Suburbs
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