Uncategorized6.6 kW Solar System: How Much Power Does It Produce?


6.6kW solar systems are most popular among Australians as a result of their reasonableness, large size, and effortless approval when you’re planning to install a grid-connected solar system. In today’s article, we’ll be discussing almost everything about the 6.6kW solar system for your home which includes cost, energy production, and ROI.

As discussed earlier, a 6.6kW solar system including a 5kW solar inverter is enough to produce an ample amount of electricity to run an average home in Australia. But, having said that, this power generation will depend upon your location. For example, if you live in Perth, then a 6.66kW solar system will produce around 29.0kWh of energy per day.

The following table shows how much energy is produced by a 6.6kW solar system in main Australian cities:

Adelaide 27.7kWh
Brisbane 27.7kWh
Melbourne 23.8kWh
Sydney 25.7kWh
Perth 29.0kWh

The energy output of solar panels differs as per seasons

That means, if you’re living in Perth, you’ll receive a relatively low amount of sunlight during the winter season as compared to Australians living in Sydney.

Pricing of a 6.6kW solar system compared to a 5kW solar system:

The following factors show- what are the cost advantages of choosing a 6.6kW solar system vs. a 5kW solar system:

  1. You will only need to install a 5kW solar inverter
  2. You could get a solar rebate on an extra 1.6kW of solar panels
  3. Very little increase in time when installing it.

6.6kW solar system cost:

A premium 6.6kW solar system costs between $5,000 to $9,000 but this cost is affected by numerous factors like – solar rebates differ its cost based on your location, solar markets for eg. Perth, and competitor solar companies, etc. The most important factor affecting the cost of a 6.6kW solar system is – “Quality” of the panels and solar installers, you select.

Cost of 6.6kW solar system in main Australian cities:

Adelaide $6,700
Brisbane $6,800 approx.
Melbourne $6,800 approx.
Perth $6,500 approx.
Sydney $6,600 approx.

Vista Electrical Controls is offering a 6.66kW solar system with Suntech 370W and a 5 kW Solis single phase inverter starting from $2149. 

6.66 kW solar system

6.6kW Solar System including 5kW solar inverter:

As mentioned earlier, a 6.6kW solar system requires a 5kW solar inverter as solar panel efficiency losses, and also few network suppliers don’t allow setting up any solar inverter more than 5kW size. Therefore you won’t need to pay any extra amount for the solar inverter. Also, you get solar rebates on an extra 1.6kW of solar panels. The cost required for setting up a 6.6kW solar system against a 5kW solar system is very small.

Solar experts at Vista EC recommend you to avoid purchasing any cheap solar power system.


Since it’s important to consider the cost of a 6.6kW solar system, you should also consider savings and efficiency. Consider where you live, your daily electricity usage, etc. 6.6kW solar systems can payback within 5 yrs. You can save more than $45,000 during your lifetime.

How many photovoltaic panels would be required for a 6.6kW solar system?

This solar energy system generally requires around 20 to 24 PV panels. This number depends upon the efficiency of the panels. i.e. whether the panels are 330W or 275W, or 370W.

Roof space requirement:

To calculate how much roof space your solar system needs, just multiply the no. of PV panels you need by 17.55 square feet.

6.6kW solar system with solar batteries:

You can buy a solar battery if your daily energy consumption is high or if you want to install an off-grid solar system. You can split the payback period between solar panels and solar batteries for that you need to find out the payback for solar batteries and when you will need to replace them.

Leave a Reply

LET’S WORK TOGETHERinfo@vistaelectricalcontrols.com.au

Mon - Sat 8.00 - 18.00
23/24 Baile Rd, Canning Vale WA 6155
1300 181 116
+61 ‎86249 3715