Solar and batteries in Rockingham: what the local data shows

Where Rockingham is

Rockingham is 38 km south of the Perth CBD. Postcode 6168 covers Rockingham, Cooloongup, East Rockingham, Garden Island, Hillman, Peron and Rockingham Beach: about 10,370 occupied homes and 24,913 people at the 2021 Census. Baldivis next door has more batteries for its size (115 per 1,000 homes against 37 here).

What stands out in Rockingham

• 37 home batteries for every 1,000 homes since Jul 2025, about half the Perth rate.
• 24 new solar systems per 1,000 homes in the last 12 months, about half the Perth rate: fewer roofs are still getting their first system.
• Smaller households: 2.1 people on average (2.6 across Perth), so evening use is usually lower.
• On the edge of the city, 38 km south of the CBD.

Batteries in Rockingham since the federal rebate began

386 batteries went in across the postcode from July 2025 to 31 August 2026, averaging 19.6 kWh (smaller than the Perth average of 21.8 kWh). Installs went from 15 in July 2025 to a high of 41 in April 2026, the same month as Perth as a whole. About 0.8% of Perth's new batteries go in here, much the same as when the rebate began.

Batteries a month, Jul 2025 to Aug 2026. August 2026 is still being registered, so it reads low.

Rockingham's solar story since 2001

510 systems went in before 2011. Then came 2011, the postcode's busiest year (742), during the first rush of rooftop solar; the quietest since was 2025. 2025 brought 213, 29% of that peak. 37% of its 5,898 systems went in between 2011 and 2015, against 29% across Perth. Many were 1.9 kW systems now past ten years old, so adding a battery to existing solar, or replacing an early system, comes up often (see a battery for existing solar). Systems grew from an average of 1.9 kW in 2011 to 9.8 kW in the last 12 months.

Solar systems a year from 2011 (2026 to 31 August 2026); counts include replacements and small businesses.

Rockingham beside its neighbours

• Warnbro, 7 km south: more batteries for its size, more new solar in the past year, more separate houses and fewer renters, with batteries of a similar size.
• Baldivis, 10 km south-east: more batteries for its size, more new solar in the past year, more separate houses and fewer renters, with batteries of a similar size.
• Port Kennedy, 11 km south: more batteries for its size, smaller batteries, more new solar in the past year, more separate houses and fewer renters.
• Bertram, 11 km east: more batteries for its size, bigger batteries, more new solar in the past year, more separate houses and fewer renters.

Prices, rebates and solar output

Each kW of panels here makes about 1,700 kWh a year, so a 9.8 kW system makes about 16,450 kWh. In STC zone 3, the federal rebates come to about $1,665 on 6.6 kW of solar and $3,663 on a 15 kWh battery (the battery rebate steps down on 1 January 2027). Prices follow the installer, not the suburb: Perth prices · WA rebates.

Getting a price in Rockingham

A vetted installer covers postcode 6168, and you meet one at a time (how we choose them).

Nearby: Warnbro · Baldivis · Port Kennedy · Bertram · every suburb · Perth guide