622 solar installations registered with the Clean Energy Regulator · ranked top 50% in Western Australia · data current as at 2026-05-15
Based on last week's Western Australia grid mix (avg 630 gCO₂/kWh), Perth CBD's 622 solar systems typically avoid around 3.00 tonnes of CO₂ every hour during peak generation.
Grid intensity data: Open Electricity (openelectricity.org.au) · 7-day average · updates monthly
Perth CBD ranks 136th 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 (26 systems, 24% below the previous year), a natural slowdown after earlier periods of stronger uptake.
Collectively, Perth CBD's 622 solar systems avoid an estimated 4,789 tonnes of CO₂ per year — the equivalent of removing 2,280 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.