How much does a 6.6kW solar system cost in Perth?

A quality 6.6kW system in Perth costs from $4,290 fully installed after the federal STC discount (2026 pricing), configured as 14 × 475W panels. Premium panel and inverter combinations range up to around $7,500. The discount is the value of small-scale technology certificates and is itemised on your quote.

How much power does a 6.6kW system produce in Perth?

In Perth's climate a north-facing 6.6kW system averages about 29kWh per day across the year — higher in summer (35kWh+) and lower in winter (around 18kWh).

Will a 6.6kW system fit my switchboard and phase?

6.6kW systems suit both single-phase and three-phase homes in the Synergy network area. Single-phase homes are limited to a 5kW inverter export, which a 6.6kW panel array pairs with perfectly.

6.6kW solar system by Perth Solar Warehouse

Residential

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6.6kW Solar System

A 6.6kW system is a common size we install. It produces around 29kWh per day on average in Perth — enough to cover most of a typical family's daytime usage and bank credits via DEBS. Panel configuration is 14 × 475W. Installation is 80% in-house, 20% subcontractors.

Supplied & installed from

$4,290after the STC discount

Zone 3 STC discount applied at point of sale

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15-year workmanship warranty
80% in-house, 20% subcontractors
$0 deposit · 36 months interest-free

System size: 6.6 kW
Panels: 14 × 475W
Daily output: 29 kWh
Roof space: 30 m²

Everything included

One price, nothing left to add.

14x 475W tier-1 N-type panels
5kW hybrid-ready inverter
Installation: 80% in-house, 20% subcontractors
Synergy/Western Power grid application & meter changeover
15-year workmanship warranty
Online monitoring setup

Full specifications

System size: 6.6 kW
Panels: 14 × 475W
Inverter: 5 kW
Phase: Single or three-phase
Roof space required: 30 m²
Daily output (Perth average): 29 kWh
Suits usage: 15–30 kWh/day (typical 3–4 person home)

Work out your numbers

This price is what the system costs. What it saves depends on your roof, your usage and your tariff — the calculators model all three from your own bill.

Calculate your payback Compare panel brands

Often paired with

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19kW solar system by Perth Solar Warehouse

19.8kW Solar System

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Tesla Powerwall 3

Integrated 11kW solar inverter — panels connect directly

From $11,990

Get the 6.6kW Solar System quoted for your roof

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4 consecutive years

15-year workmanship warranty

80% in-house, 20% subcontractors