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Solar & battery

How much does solar and a home battery cost?

A 6.6 kW solar system costs about $5,500 to $8,000 after the STC discount.

6.6 kW solar system, installed, after the STC discount:$5,500–$8,000 per system

Updated 15 October 2026 · 2 min read · GST basis not confirmed by sources. Check GST on every quote.

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On this page
  1. How a solar installer works out the price
  2. What it costs, by scenario
  3. What changes the price
  4. What's usually included, and what isn't
  5. Metro and regional differences
  6. Licensing and compliance
  7. Rebates and incentives
  8. Before you accept a quote, check
  9. Frequently asked questions
  10. Sources and method

How a solar installer works out the price

A solar installer usually quotes one price for the whole system: panels, inverter, mounting, wiring, installation and paperwork. The federal STC discount is normally taken off that price for you, but check that your quote says whether it is before or after the discount. A battery is priced the same way, with the federal battery discount taken off at the point of sale when you assign your certificates to the retailer or agent. A hybrid inverter, where your system needs one, is often priced separately.

  1. System size in kW for panels, or usable capacity in kWh for a battery
  2. Equipment: panels, inverter, battery, mounting and cabling
  3. Installation labour and switchboard work
  4. Less the federal STC discount, where the quote passes it on
  5. Less any state discount that applies, and GST on the total if the quote says it applies

Worked example: 10 kWh battery, mid-range brand, installed in a standard home (illustrative, not a quote)

Battery and installation before the federal discount
$11,000
Federal Cheaper Home Batteries discount for 10 kWh (May to December 2026)
-$2,516
Hybrid inverter, only if your system needs one
quoted separately
Total
$8,484 before any inverter (illustrative)

What it costs, by scenario

Low, typical and high prices. Built on 15 October 2026 from Australian solar retailer and comparison-site price guides, the Clean Energy Regulator and state regulator pages. Each range stays inside figures that at least two publishers' ranges share; GST basis is not confirmed by most of the sources.

  • 6.6 kW solar system, installed, after the STC discount (per system)

    Three price guides share $5,500 to $8,000 and a fourth ($7,000 to $8,000) sits inside it, so we use that range. Typical is a figure inside the overlap that one guide calls the most common spend. Premium panels and inverters, steep or tiled roofs and three-phase upgrades push the price up.

    Low
    $5,500
    Typical
    $6,500
    High
    $8,000

  • 10 kW solar system, installed, after the STC discount (per system)

    Three guides share $8,000 to $12,000. One installer gives about $9,500 as its typical figure. Going from 6.6 kW to 10 kW adds a few thousand dollars, and your inverter and roof set the rest.

    Low
    $8,000
    Typical
    $9,500
    High
    $12,000

  • 10 kWh home battery, installed, after the federal discount (per battery)

    Thin evidence: this is a narrow band, not a full market range. One supplier's price tracker (September 2026) lists $5,030 to $8,688 after the discount for the models it covers, and a second supplier gives single figures of $8,650 and $9,240 for the same size after the rebate. We use the band where the two meet, with $8,650 as typical, and leave out the $9,240 figure and premium brands because only one source supports them. A comparison site that excludes installation is not like-for-like and is not used. Brand matters most, and the sources do not all say whether a hybrid inverter is included, which can add to the price.

    Low
    $8,000
    Typical
    $8,650
    High
    $8,700
Low, typical and high prices by scenario
ScenarioLowTypicalHigh
6.6 kW solar system, installed, after the STC discount (per system)Three price guides share $5,500 to $8,000 and a fourth ($7,000 to $8,000) sits inside it, so we use that range. Typical is a figure inside the overlap that one guide calls the most common spend. Premium panels and inverters, steep or tiled roofs and three-phase upgrades push the price up.$5,500$6,500$8,000
10 kW solar system, installed, after the STC discount (per system)Three guides share $8,000 to $12,000. One installer gives about $9,500 as its typical figure. Going from 6.6 kW to 10 kW adds a few thousand dollars, and your inverter and roof set the rest.$8,000$9,500$12,000
10 kWh home battery, installed, after the federal discount (per battery)Thin evidence: this is a narrow band, not a full market range. One supplier's price tracker (September 2026) lists $5,030 to $8,688 after the discount for the models it covers, and a second supplier gives single figures of $8,650 and $9,240 for the same size after the rebate. We use the band where the two meet, with $8,650 as typical, and leave out the $9,240 figure and premium brands because only one source supports them. A comparison site that excludes installation is not like-for-like and is not used. Brand matters most, and the sources do not all say whether a hybrid inverter is included, which can add to the price.$8,000$8,650$8,700

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What changes the price

  • System size. A larger system costs more in total. One installer puts the step from 6.6 kW to 10 kW at a few thousand dollars.
  • Brand and quality of equipment. Premium panels, inverters and batteries cost noticeably more than mid-range ones.
  • Roof type and access. Tiled, steep or multi-storey roofs take more time and safety gear to work on.
  • Inverter and switchboard. A hybrid inverter for a battery, three-phase power, or an old switchboard that needs upgrading adds cost.
  • The STC discount on the day. The federal discount for a battery changes with the STC factor and with the battery size, so a quote can change if installation slips into a new period.
  • Location. Travel and local demand vary. See the metro and regional note below.

What's usually included, and what isn't

Usually included

  • Panels, inverter, mounting and cabling for the quoted system size
  • Installation by a Solar Accreditation Australia installer and a licensed electrician
  • The STC discount, where the quote passes it on
  • Commissioning, connection paperwork and the electrical safety certificate your state requires

Often extra

  • A hybrid inverter, where a battery needs one and the quote does not include it
  • Switchboard upgrades, three-phase upgrades or meter changes
  • Roof repairs, tree removal or scaffold hire beyond a standard install
  • Network connection fees and approvals your electricity distributor charges

Metro and regional differences

Metro: Cities have many installers competing on price, but wages and demand are higher.

Regional: Our sources do not give separate regional figures. In remote areas a longer drive, freight on equipment and fewer installers can raise the price.

Licensing and compliance

Grid-connected solar and batteries must be installed by a person accredited under the federal Small-scale Renewable Energy Scheme, and the discount only applies to certificates created that way.

The Clean Energy Regulator says the installer needs Solar Accreditation Australia (SAA) accreditation, with a battery endorsement for batteries; the Clean Energy Council now approves products rather than accrediting installers.

Electrical work also needs a licensed electrician.

We opened these regulator pages: Clean Energy Regulator, for the national battery rules; Solar Victoria, which says installers need SAA accreditation and an unrestricted (Class A) electrical licence registered with Energy Safe Victoria; Building Commission NSW, which says electrical wiring work must be done by or under the supervision of a licensed electrician, with a Certificate of Compliance lodged within seven days; and Building and Energy in Western Australia, where the electrical contractor provides notices and an Electrical Safety Certificate.

We did not read the rules for Queensland, South Australia, Tasmania, the ACT or the Northern Territory, so check your own state regulator.

Ask for the installer's SAA accreditation number and electrical licence number, and check them before work starts.

Rebates and incentives

These are federal rules unless stated. Small-scale technology certificates (STCs) lower the price of solar systems, and the sources we read say installers usually take the discount off the quoted price. Home batteries get STCs under the Cheaper Home Batteries Program. The Clean Energy Regulator page, last updated 31 July 2026, gives a battery STC factor of 6.8 for May to December 2026 (8.4 for January to April), applied in tiers: 100 per cent for the first 14 kWh of usable capacity, 60 per cent from 14 to 28 kWh and 15 per cent from 28 to 50 kWh. One retailer works this out at about $2,516 for a 10 kWh battery, assuming a $37 STC price. You can only claim for one battery per premises, the battery must be on the Clean Energy Council approved list, and the discount is usually passed on when you assign your STC rights to a registered agent or the retailer. Check the Clean Energy Regulator page for the current factor before you sign. State schemes vary: Solar Victoria's interest-free battery loan was closed to new applications when we read its page (updated 16 April 2026). We did not confirm other state or territory rebates, so ask your installer which apply.

Before you accept a quote, check

  • Is the price before or after the STC discount, and who claims the certificates?
  • What size is the system in kW, and which panel and inverter brands are in the quote?
  • For a battery, what is the usable capacity in kWh, and does the price include a hybrid inverter?
  • Is the installer Solar Accreditation Australia accredited, and is an electrician licensed in your state doing the wiring?
  • Does the quote say whether GST is included?
  • Which warranties apply to the panels, inverter, battery and installation?

Frequently asked questions

Is the STC discount already taken off the quoted price?

Usually yes. The guides we read describe it as a point-of-sale discount that your installer takes off the price, but a quote can show prices before or after it, so ask.

How big a solar system do I need?

The right size depends on how much power your household uses, your roof space and your network's limits. The sources here price 6.6 kW and 10 kW systems, so ask your installer to explain why they chose the size in your quote.

How much is the federal battery discount?

For May to December 2026 the Clean Energy Regulator lists a factor of 6.8, which one retailer works out at about $2,516 for a 10 kWh battery. The value depends on battery size, usable capacity and the STC price on the day.

Why are battery prices so different between brands?

Premium brands cost much more than mid-range ones, and some batteries need a separate hybrid inverter. Compare the total installed price and the usable capacity, not just the headline price.

Can I get the rebate on a second battery?

Not under the federal program. The Clean Energy Regulator says STCs can be claimed for only one eligible battery at a premises.

Does a licensed electrician have to be involved?

Yes. In the states whose pages we opened, electrical work must be done by a licensed electrician, and the installer also needs Solar Accreditation Australia accreditation to create certificates.

Sources and method

Built on 15 October 2026 from Australian solar retailer and comparison-site price guides, the Clean Energy Regulator and state regulator pages. Each range stays inside figures that at least two publishers' ranges share; GST basis is not confirmed by most of the sources. How we calculate our guides.

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