578 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), Terrey Hills's 578 solar systems typically avoid around 3.49 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Terrey Hills ranks 406th in New South Wales for solar installations — in the middle tier of 721 postcodes tracked by the Clean Energy Regulator across the state. Growth has been strong, with 54 new systems installed in the past 12 months — a 23% increase on the previous year, making Terrey Hills one of New South Wales's faster-growing solar postcodes.
Collectively, Terrey Hills's 578 solar systems avoid an estimated 5,580 tonnes of CO₂ per year — the equivalent of removing 2,657 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.