523 solar installations registered with the Clean Energy Regulator · ranked bottom 50% in New South Wales · data current as at 2026-06-15
Based on last week's New South Wales grid mix (avg 790 gCO₂/kWh), Wahroonga's 523 solar systems typically avoid around 3.16 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Wahroonga ranks 417th in New South Wales for solar installations — in the middle tier of 721 postcodes tracked by the Clean Energy Regulator across the state. New installations eased in the past 12 months (39 systems, 29% below the previous year), a natural slowdown after earlier periods of stronger uptake.
Collectively, Wahroonga's 523 solar systems avoid an estimated 5,049 tonnes of CO₂ per year — the equivalent of removing 2,404 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.