Solar panels in Perth
A 6 kWp home system in Perth is modelled to produce about 9,711 kWh a year, or 1,618 kWh per installed kWp, from PVGIS climate data at the city's coordinates. Postcode 6000 falls in STC zone 3 (zone rating 1.382) in the Clean Energy Regulator table. Three verified local rules and their sources are listed below. In our full list of 41 cities worldwide, Perth is 3rd. Perth produces 8% more per kWp than the national reference point on our Australia page. No other city we cover in Australia has a higher yield than Perth. Sydney gets 1,502 kWh per kWp. Year-one savings come to about AUD 1,288, for a simple payback of 5.3 years.
Month by month in Perth
Modelled output of a 6 kWp system at 35° facing north (towards the equator), from PVGIS climate data (PVGIS-ERA5, 2005 to 2023).
| Month | kWh | Share of year |
|---|---|---|
| January | 948 | 9.8% |
| February | 870 | 9.0% |
| March | 906 | 9.3% |
| April | 781 | 8.0% |
| May | 717 | 7.4% |
| June | 608 | 6.3% |
| July | 609 | 6.3% |
| August | 716 | 7.4% |
| September | 787 | 8.1% |
| October | 909 | 9.4% |
| November | 914 | 9.4% |
| December | 945 | 9.7% |
- Best month: January (948 kWh). Weakest: June (608 kWh), a 1.6x difference.
- January, November, December produce 28.9% of the year; June, July, August produce 19.9%.
- Year-to-year variation: about 195 kWh (2.0%, one standard deviation).
- Sunlight reaching the panels: 2,172 kWh per m² a year.
Local rules and support in Perth
Rules set by the city or its region, on top of the national scheme. Each one was checked against the official source on the date shown.
- Postcode 6000 (Perth)
STC postcode zone 3
Postcode 6000 falls in STC zone 3 (zone rating 1.382) in the Clean Energy Regulator table.
Source: Clean Energy Regulator, Postcode zone ratings and zones for solar (photovoltaic) systems (as of 1 January 2020) (checked 2026-09-25)
- Western Australia (Synergy, SWIS)
Synergy DEBS buyback rates
Synergy residential customers on the Distributed Energy Buyback Scheme are paid 10 c/kWh for exports between 3pm and 9pm and 2 c/kWh at other times, as at 1 July 2026 (excluding GST).
Source: Synergy, Distributed Energy Buyback Scheme (DEBS) Price Schedule, SWIS customers only, 1 July 2026 (checked 2026-09-25)
- Western Australia
WA Residential Battery Scheme
The WA Government offers Synergy customers a battery rebate of up to $1,300, on top of the federal Cheaper Home Batteries Program, plus no-interest loans up to $10,000 for households under $210,000 income. Joining a virtual power plant is required (page updated 21 May 2026).
Source: Government of Western Australia (Energy Policy WA), WA Residential Battery Scheme (checked 2026-09-25)
How Perth compares
Perth ranks 1 of 4 for yield among the cities we model in Australia, and 3 of 41 across every country on Solar Figures. Within one country the prices are the same, so a payback gap between these cities comes from sunshine alone.
| City | kWh per kWp / yr | Payback (AUD) |
|---|---|---|
| Perth | 1,618 | 5.3 yrs |
| Sydney | 1,502 | 5.7 yrs |
| Brisbane | 1,469 | 5.8 yrs |
| Melbourne | 1,382 | 6.4 yrs |
| National reference point (country page) | 1,498 | 5.7 yrs |
Closest yield abroad: Seville (1,597 kWh per kWp), Valencia (1,563 kWh per kWp), Marseille (1,563 kWh per kWp).
What moves the payback in Perth
Power you use yourself is worth the retail price (A$0.33 per kWh); power you export earns A$0.05. So the share you use at home, by running appliances in daylight or adding a battery, changes the payback. The system cost stays the same in every row (a battery would add to it).
| Used at home | Year-1 savings | Payback |
|---|---|---|
| 20% | A$1,019 | 6.8 yrs |
| 30% (our default) | A$1,288 | 5.3 yrs |
| 50% | A$1,827 | 3.7 yrs |
| 70% | A$2,365 | 2.8 yrs |
- Net system cost after incentives: A$6,522 for 6 kWp.
- Incentive modelled: A$1,578 (SRES STC point-of-sale rebate (~263 AUD/kWp: Zone 3 1.382 x 5-yr deeming (2026) x ~38 AUD/STC); declines one deeming year each 1 Jan to 2030).
- 25-year net savings at our default: A$33,969.
Best panel angle in Perth
At latitude 31.95°S, PVGIS finds the fixed tilt and direction that maximise yearly output. Our figures use a common 35° roof; the table shows what the optimum adds.
| Setup | Tilt | Facing | kWh per kWp / yr |
|---|---|---|---|
| Standard roof (used on this page) | 35° | north | 1,618 |
| PVGIS optimum (tilt only, facing the equator) | 30° | north (1°) | 1,624 |
The optimum adds 0.4% a year over the standard roof in Perth. Most of a roof's value comes from its direction: a roof facing away from the equator loses far more than a few degrees of tilt.
See the full Australia picture on our Australia solar page, or the national incentives in our Australia solar guide.
Sources and method
Figures computed 2026-09-25 for a 6 kWp system, 35° tilt, 14% system losses, terrain shading on. An estimate, not a quote: your installer's quote will be exact.
- PVGIS 5.3 PVcalc (PVGIS-ERA5), European Commission JRC (checked 2026-09-25)
- Australia tariff and incentive inputs (see DATA_SOURCES.md) (checked 2026-06-21)
- Australia tariff and incentive inputs (see DATA_SOURCES.md) (checked 2026-06-21)
- Synergy: Distributed Energy Buyback Scheme (DEBS) Price Schedule, SWIS customers only, 1 July 2026 (checked 2026-09-25)
- Government of Western Australia (Energy Policy WA): WA Residential Battery Scheme (checked 2026-09-25)
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