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2,249 solar installations registered with the Clean Energy Regulator · ranked top 25% in South Australia · data current as at 2026-04-03
Based on last week's South Australia grid mix (avg 370 gCO₂/kWh), Willunga's 2,249 solar systems typically avoid around 6.37 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Willunga sits in the top third of South Australia for solar uptake, ranking 75th in the state out of 347 postcodes in the Clean Energy Regulator dataset. Growth has been strong, with 112 new systems installed in the past 12 months — a 24% increase on the previous year, making Willunga one of South Australia's faster-growing solar postcodes.
The combined impact is substantial: Willunga's solar community avoids an estimated 10,169 tonnes of CO₂ every year — equivalent to taking 4,842 cars off the road or powering around 2,034 average Australian homes with clean electricity. 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.