| Panel count (typical) | 40 panels at ~440 W each |
| Inverter | 10 kW |
| Typical retail price | $12,500–$17,200 |
| Annual generation | ~19,140 kWh / yr |
| Daily generation | ~52 kWh / day |
| Roof area needed | About 66 m² of north-facing roof |
| Suits | Large families, all-electric homes, or EV households, $900+ / quarter |
| Typical payback | 3.5–5 years |
Federal STC rebate on a 13.2 kW system, by state
The federal STC rebate scales with system size and STC zone. Here's what a 13.2 kW install attracts in each state in 2026:
| State | STC zone | Federal STC rebate | Net price (low end) |
|---|---|---|---|
| New South Wales | Zone 3 | $2,773 | $9,727 |
| Victoria | Zone 4 | $2,378 | $10,122 |
| Queensland | Zone 2 | $2,773 | $9,727 |
| South Australia | Zone 3 | $2,773 | $9,727 |
| Western Australia | Zone 3 | $2,773 | $9,727 |
| Tasmania | Zone 4 | $2,191 | $10,309 |
| Australian Capital Territory | Zone 4 | $2,378 | $10,122 |
| Northern Territory | Zone 1 | $3,254 | $9,246 |
Add state-specific rebates on top where applicable. The ACT and NSW stacks typically reduce net cost another $1,600–$2,500.
How a 13.2 kW system performs day-to-day
On a clear summer day in Sydney or Brisbane, a 13.2 kW system produces around 70 kWh. On an overcast winter day in Melbourne, it might produce 26 kWh. Annual average is about 52 kWh per day.
For most homes, around 30–40% of that generation is consumed at home in real time. The rest is exported to the grid (and earns the feed-in tariff). Adding a battery typically pushes self-consumption to 80–90%.
Who a 13.2 kW system actually suits
We get this question on every specialist follow-up. Quick rule of thumb based on quarterly bill size:
- 5 kW — Under $300 / quarter · 1–2 people
- 6.6 kW — $300–$600 / quarter · 3–4 people
- 8 kW — $500–$800 / quarter · 4–5 people
- 10 kW — $700–$1,000 / quarter · 4–6 people
- 13.2 kW — $900+ / quarter · Large families, all-electric homes, or EV households
These are starting points. Other factors that bump you up or down: daytime usage (pool, EV, electric hot water), planned future loads (EV in the next 2 years pushes you up a size), shading, and roof orientation.
Battery pairing
A 13.2 kW system pairs naturally with a 20 kWh battery. The federal Cheaper Home Batteries Program pays about $258 per usable kWh on the first 14 kWh, tapering above — so the federal rebate alone covers about $4,541 off the battery price. Add NSW's PDRS per-kWh battery incentive or WA's Residential Battery Scheme on top where applicable.
Full Cheaper Home Batteries explainer →
Common questions about 13.2 kW solar
How much does a 13.2 kW solar system cost in 2026?
Fully installed, a 13.2 kW system costs between $12,500 and $17,200 retail before rebates. After the federal STC rebate (around $2,773 in Sydney/NSW, varying by state), most households pay roughly $9,727 to $14,427 net.
How much electricity does a 13.2 kW solar system generate?
A 13.2 kW system generates roughly 19,140 kWh per year on average in Australia — that's about 52 kWh per day. Output varies ±20% depending on location, roof orientation, and shading.
Who is a 13.2 kW system suitable for?
Large families, all-electric homes, or EV households households with quarterly bills in the $900+ / quarter range. You need roughly About 66 m² of north-facing roof. The largest standard residential install before single-phase capacity becomes a problem. Suits all-electric households planning an EV or already running ducted air-con + pool + electric hot water.
What inverter pairs with a 13.2 kW solar system?
A 10 kW inverter is the standard pairing. The "oversized DC" approach (panels rated higher than the inverter) is legitimate — it captures more STC rebate (which is calculated on panel capacity) without significant real-world clipping.
Should I add a battery to a 13.2 kW system?
A 20 kWh battery is the natural pairing for a 13.2 kW system. The federal Cheaper Home Batteries Program pays about $258 per usable kWh on the first 14 kWh (tapered above), knocking roughly $4,541 off the battery price.
Get matched with a 13.2 kW installer
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