6.6kW Solar System Information – Facts & Figures

On This Page:

Other solar system sizes you may be interested in around the same size:

Slightly smaller 6kW system information OR Slightly larger 7kW system information.

Sick of high power bills?

    100% Free
    Australia-Wide Comparisons
    Beat the price rises
    Get a better deal on power & gas
Click To Compare Now

6.6kW Solar Power System Information

Did you know that 6.6kW solar power systems can consist of a different number of panels depending on the size of the solar panels? Here are some common panel sizes which could make up a 6.6kW system:

  • 330W (20 x solar panels to make 6.60kW)
  • 350W (19 x solar panels to make 6.65kW)
  • 370W (18 x solar panels to make 6.66kW)
  • 390W (17 x solar panels to make 6.63kW)
  • 400W (17 x solar panels to make 6.80kW)
  • 420W (16 x solar panels to make 6.72kW)
  • 450W (15 x solar panels to make 6.75kW)
  • 480W (14 x solar panels to make 6.72kW)
  • 500W (13 x solar panels to make 6.50kW)

How Much Energy Does a 6.6kW System Produce?

Depending on where in Australia (or around the world) you are, a 6.6kW solar system will produce a different amount of energy each day. As an average amount, you can see here how much this system will produce in some of the major regions in Australia by switching between each tab.

Brisbane, QLD Sydney, NSW Perth, WA Melbourne, VIC Adelaide, SA Hobart, TAS Canberra, ACT Darwin, NT
Daily kWhs 27.30 25.35 28.60 23.40 27.30 22.75 27.95 28.60
Annual kWhs 9,965 9,253 10,439 8,541 9,965 8,304 10,202 10,439

What Size Inverter Will You Need/Be Able To Get?

6.6kW systems may include this residential Fronius inverter

Inverters can be sized differently to your overall panel array.

While your panel array might be 6.6kW, the inverter could be either less or more than this size. Normally it is bad to have a much larger inverter than panels. It is usually good to have an inverter that is less than the array size.

A 6.6kW solar array can be put with an inverter with an AC output of 4.95kW.

What you "can" do is not what you "should" do. All inverters have different specs. And based on those specs you might be able to put a LOT more panels on than the rated inverter capacity. That does not mean you should. Thankfully the Clean Energy Regulator has made an "easy ratio" to follow.

The magic number is 1.33333.... You can put up to 1.333 x the kW of panels on what the inverter says and still be eligible for STC incentives.

How Much Space Does a 6.6kW Solar System Need?

Again, this depends what type of panels you use (in part). This is because as panels get large (in Watts) they also become a little bit more efficient.

A 6.6kW system using 370W panels will require about 31.6 square meters of roof to be installed.

Each 370W panel measures about 1.75m x 1m.

6.6kW Solar System Applications

6.6kW solar power systems are mostly suitable for higher energy users (3 people or more). This size of solar power system is classed as "Commercial".

6.6kW Solar System Pricing

A 6.6kW solar system will certainly cost a different amount depending on the solar business you buy it from. Prices also vary from city to city due to logistics, taxes etc.

To give you some indication though, we believe that the "market price" for a 6.6kW solar system at the moment is between:
$7,500.00 (on the lower end - e.g. cheap Chinese) to...
$11,400.00 (on the higher end - e.g. tier 1 solar panels and a German inverter - such as SMA).

NOTE: The Prices above are "after-rebate" prices and are only a guide to what you might expect as at Jul, 2024

How Much Does a 6.6kW System Cost?

The cost of 6.6kW solar power systems varies. On the lower end, you might expect to get Chinese inverters such as Sungrow, Growatt, JFY, Goodwe etc. and Chinese (lower-tier) panels such as Hannover, Munsterland, ZN Shine etc. You might expect to pay $7,500.00 for such a system.

On the higher end of the spectrum you might be looking at a premium, European inverter like SMA, ABB, Fronius etc. and a tier 1 panel like SUNPOWER, TRINA, WINAICO etc. You might expect to pay $11,400.00 for this type of 6.6kW solar power system.

Finance Repayments on a 6.6kW Solar Power System

You could expect to pay somewhere between $242.19 and $361.66 per month as a repayment for your 6.6kW solar power system.

Note: This figure could vary drastically. It is based on some common solar power finance rates for residential size systems.
Get 6.6kW Solar Quotes Now - Click Here

Do I Need A 6.6kW Solar System?

Whether or not you need a 6.6kW solar system will depend on many things.

If you are a Commercial customer and you use between 24.7kWhs and 39.3kWhs then a 6.6kW solar system could be a good choice to help reduce power bill costs.

6.6kW Solar Power System Quotes

Solar Proof Quotes offer a quick and easy way to get 6.6kW solar system quotes.

Just fill out our quick and easy form to get quotes from great installers in your region who are experienced in 6.6kW solar power installations.