1,790 solar installations registered with the Clean Energy Regulator · ranked top 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), Wahroonga's 1,790 solar systems typically avoid around 10.82 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Wahroonga sits in the top third of New South Wales for solar uptake, ranking 209th in the state out of 721 postcodes in the Clean Energy Regulator dataset. Growth has been strong, with 233 new systems installed in the past 12 months — a 61% increase on the previous year, making Wahroonga one of New South Wales's faster-growing solar postcodes.
The combined impact is substantial: Wahroonga's solar community avoids an estimated 17,281 tonnes of CO₂ every year — equivalent to taking 8,229 cars off the road or powering around 3,456 average Australian homes with clean electricity. 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.