61 solar installations registered with the Clean Energy Regulator · ranked bottom 50% in South Australia · data current as at 2026-05-15
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 294th in South Australia out of 347 postcodes in the Clean Energy Regulator dataset, with 61 registered systems to date. New installations eased in the past 12 months (5 systems, 17% below the previous year), a natural slowdown after earlier periods of stronger uptake.
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.