A 6.6kW solar system is the most popular size for Melbourne homes. It produces around 24 kWh a day on average, or about 8,600 kWh a year. It pairs 6.6kW of panels with a 5kW inverter, which is the most output most single phase Victorian homes can install while staying within network export limits.
We use Tier 1 panels, trusted inverter brands and accredited electricians, and we handle every approval from the network application to the new meter.
6.6kW Solar System at a Glance
| Specification | 6.6kW Solar System |
|---|---|
| Panels | Around 14 to 15 panels at 440W to 475W each |
| Inverter | 5kW single phase inverter (string or hybrid) |
| Roof space needed | About 30 to 32 square metres of unshaded roof |
| Average daily output in Melbourne | About 24 kWh |
| Estimated yearly output | About 8,600 kWh |
| Best suited to | Families of three to five, moderate to high daytime use |
| Warranties | 25 year panel product, 10 year inverter, 10 year workmanship |
Output figures are estimates based on Melbourne’s average solar exposure of roughly 3.6 kWh per kW of panels per day. Real generation depends on roof direction, tilt, shading and season, and is typically about half the average in mid-winter.
Tier 1 Solar Panels
14 to 15 x 440W to 475W Solar Panels
- Tier 1 solar modules from recognised manufacturers
- 440W to 475W high efficiency panels
- All panels on the Clean Energy Council approved list
- 25 year product warranty
- Local Australian warranty support
5kW Solar Inverter
1 x 5kW Inverter
- High efficiency string or hybrid inverter
- Proven brands such as Fronius, GoodWe and Sungrow
- 10 year inverter warranty
- Wi-Fi app monitoring of generation and usage
- Battery ready when you choose a hybrid model
Roof Mounting and Racking
Panel Mounting Kit
- Racking for tin, tile and Klip-Lok roofs
- Anodised aluminium, corrosion resistant
- Engineered for Australian wind loads
- Lightweight, low profile finish
- Tilt frames available for flat roofs
Professional Solar Installation
Installation by Silicon Solar
- Solar Accreditation Australia (SAA) accredited, licensed electricians
- 10 year workmanship warranty
- Grid connection and meter paperwork handled for you
- Certificate of Electrical Safety (CES) provided
- System handover and app setup on the day
Why Is 6.6kW the Most Popular Solar System Size?
Clean Energy Council rules allow solar panels to be oversized by up to 133 percent of the inverter rating. Pairing 6.6kW of panels with a 5kW inverter means the inverter runs closer to full capacity for more of the day, including mornings, afternoons and cloudy days, so you get more usable energy for a small extra cost.
It also fits the export limits on most Victorian single phase connections, which is why it is the go-to size for:
- Families of three to five people
- Homes with reverse cycle air conditioning or split systems
- Households planning a battery or electric vehicle in future
- Medium sized roofs with good north, east or west exposure
How Much Will a 6.6kW Solar System Save?
With around 24 kWh a day available, a 6.6kW system can cover the daytime needs of most family homes with surplus left over to export. Savings depend on how much of that energy you use yourself, so we look at when your household uses power, not just how much.
- Shift appliances such as the dishwasher and washing machine into daylight hours
- Use a timer or smart controller on electric hot water
- Run reverse cycle heating or cooling while the sun is up
- Consider a battery to carry surplus solar into the evening
See hybrid solar and battery systems if you want to use more of your solar at night.
How Your 6.6kW Solar System Installation Works
- Free consultation and site assessment. We review your power bills, roof space, shading and switchboard.
- System design and fixed quote. You get a clear, itemised quote with the exact panel, inverter and racking brands.
- Approvals and paperwork. We lodge the network application with your distributor and apply any eligible rebates and STC discounts.
- Installation. Our accredited team completes the installation, with most homes taking around one day.
- Inspection, meter and handover. We arrange the Certificate of Electrical Safety and meter reconfiguration, then show you how to monitor your system.
Rebates for a 6.6kW Solar System in Victoria
Most Victorian homes can reduce the upfront cost through the federal Small-scale Technology Certificate (STC) discount, which we take off your quote, and you may also qualify for Solar Victoria programs. See our Victoria solar rebate guide and, if you are adding storage, the Cheaper Home Batteries Program. We confirm your eligibility during the free assessment.
Why Choose Silicon Solar for Your 6.6kW Solar System
Silicon Solar has been installing solar across Victoria since 2015. We are a CEC Approved Solar Retailer, a Solar Victoria Authorised Retailer and NETCC approved, with more than 4,000 customers served and a 4.9 star Google rating.
- Systems designed around your bills, roof and budget
- Only Clean Energy Council approved panels and inverters
- Accredited installers and one point of contact from quote to handover
- We manage approvals, rebates, CES and meter changes
- Local Victorian support after installation
Compare other options: 5kW solar system, 10kW solar system and hybrid solar and battery systems.
Frequently Asked Questions
About 24 kWh per day on average, or roughly 8,600 kWh per year. Expect more in summer and less in winter, depending on roof direction and shading.
Clean Energy Council rules allow panels to be oversized up to 133 percent of the inverter rating. 6.6kW of panels on a 5kW inverter produces more usable energy across the day and suits single phase export limits.
Around 14 to 15 panels using 440W to 475W modules, needing about 30 to 32 square metres of roof.
For most families of three to five it is the best balance of cost and output. Larger homes with ducted air conditioning, a pool or an EV may be better suited to 10kW.
Yes. Choose a hybrid inverter now for the simplest upgrade, or add an AC coupled battery to an existing system later.
Price depends on panel and inverter brand, roof type and any rebates you qualify for. We provide a free, fixed, itemised quote after assessing your property.