644 solar installations registered with the Clean Energy Regulator · ranked top 50% in Western Australia · data current as at 2026-08-15
Based on last week's Western Australia grid mix (avg 630 gCO₂/kWh), Perth's 644 solar systems typically avoid around 3.10 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Perth ranks 135th in Western Australia for solar installations — in the middle tier of 388 postcodes tracked by the Clean Energy Regulator across the state. New installations eased in the past 12 months (30 systems, 37% below the previous year), a natural slowdown after earlier periods of stronger uptake.
Collectively, Perth's 644 solar systems avoid an estimated 4,958 tonnes of CO₂ per year — the equivalent of removing 2,361 cars from the road. This is estimated using Western Australia's average grid emissions intensity of 630 gCO₂/kWh, sourced from OpenElectricity, applied to an average system size of 9kW.