426 solar installations registered with the Clean Energy Regulator · ranked bottom 50% in South Australia · data current as at 2026-08-15
Based on last week's South Australia grid mix (avg 370 gCO₂/kWh), Willunga's 426 solar systems typically avoid around 1.21 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Willunga ranks 192nd in South Australia for solar installations — in the middle tier of 347 postcodes tracked by the Clean Energy Regulator across the state. 28 new systems were added in the past 12 months, with growth of 0% on the previous year — typical of a maturing market where most interested households have already installed.
Collectively, Willunga's 426 solar systems avoid an estimated 1,926 tonnes of CO₂ per year — the equivalent of removing 917 cars from the road. 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.