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61 solar installations registered with the Clean Energy Regulator · ranked bottom 50% in South Australia · data current as at 2026-04-03
Based on last week's South Australia grid mix (avg 370 gCO₂/kWh), Williamstown's 61 solar systems typically avoid around 0.17 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Williamstown ranks 293rd in South Australia out of 347 postcodes in the Clean Energy Regulator dataset, with 61 registered systems to date. Growth has been strong, with 8 new systems installed in the past 12 months — a 167% increase on the previous year, making Williamstown one of South Australia's faster-growing solar postcodes.
Williamstown's solar systems avoid an estimated 276 tonnes of CO₂ per year, equivalent to 131 fewer cars on the road annually. This is estimated using South Australia's average grid emissions intensity of 370 gCO₂/kWh, sourced from OpenElectricity, applied to an average system size of 9kW.