How Much Is a 6.6kW Solar System With a Battery?

 Installing a 6.6 kW solar system with a battery is one of the most common and effective solar setups for Australian households. It offers the ideal balance of energy output, system cost, and long-term value — especially when paired with the right-sized battery and a quality installer.

In 2025, the average cost of a 6.6kW solar system with a battery in Australia ranges from $9,500 to $14,000, depending on the components and installation quality. Without a battery, the same system may cost $5,500 to $7,000. A 10 to 13kWh solar battery typically adds $4,000 to $8,000 to the total price, depending on the brand and features.

Why Is the 6.6kW Solar System So Popular in Australia?

The 6.6kW system is suited to the needs of most medium-to-large Australian households. It includes about 16 to 18 solar panels and usually connects to a 5kW inverter — the largest inverter size eligible for full feed-in tariffs in many states.

Why Australians choose this system:

  • Output efficiency: Generates around 24–27kWh per day, enough for typical family usage.
  • Rebate eligibility: Qualifies for STCs (federal rebates) and many state-based incentives.
  • Battery flexibility: Easily upgraded later with a solar battery if not included at installation.

Read More: https://www.greenlightsolar.com.au/6-6kw-solar-system-with-battery-cost-australia/

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