334 solar installations registered with the Clean Energy Regulator · ranked bottom 50% in New South Wales · data current as at 2026-08-15
Based on last week's New South Wales grid mix (avg 790 gCO₂/kWh), Castlereagh's 334 solar systems typically avoid around 2.02 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Castlereagh ranks 478th in New South Wales out of 721 postcodes in the Clean Energy Regulator dataset, with 334 registered systems to date. Growth has been strong, with 21 new systems installed in the past 12 months — a 40% increase on the previous year, making Castlereagh one of New South Wales's faster-growing solar postcodes.
Collectively, Castlereagh's 334 solar systems avoid an estimated 3,224 tonnes of CO₂ per year — the equivalent of removing 1,535 cars from the road. This is estimated using New South Wales's average grid emissions intensity of 790 gCO₂/kWh, sourced from OpenElectricity, applied to an average system size of 9kW.