You are here:

6.6kW Solar Systems: A Comprehensive Guide for Beginners

6.6kW solar systems are fast becoming one of the most popular options for Australian homes due to their affordability and ease of connection to the grid. But, finding out whether a 6.6 kW solar system with battery is the right option for you and your family may seem like a daunting task. This article offers an overview of everything you need to know if you are contemplating a 6kW solar system for your home.
Fact Checked

Updated: 13 May 2024

Find out the 6.6kw solar system price, the 6.6 kW solar system daily output, energy prices, the 6.6kw solar system with a battery price, and their attractiveness as an investment. It’s time to start shifting towards a sustainable lifestyle, and a 6.6 solar system is one of the best ways to do so. Remember to always review and compare products and prices before making your final choice.

Key facts

Top reasons to choose a 6kW solar system

A 6 kW solar panel system is rising in popularity in Australia. The system itself is compact enough to fit a variety of spaces while remaining powerful enough to produce enough electricity to fuel a household – sometimes even more!

Below are a few of the other benefits of installing a 6.6kW solar system provides:

What is the difference between a 5kW system and a 6.6kW solar panel system?

The Small Scale Technology Certificate scheme allows the capacity of an inverter installed at your premises to be oversized with panels by 33%. This is a great benefit for homeowners who want more power but don’t need or can’t afford solar panel installation. A 5kW Solar System on a 5-6 kW Inverter will generate less than 6Kw when compared against one utilising larger equipment, yet there’s not much difference in cost between these two setups. A 6.6 kW system will cost around the same amount but produce more electricity.

Should you get a 6.6kW solar system with a battery?

A standard solar system can only generate power during daylight hours. But with battery backup, you’ll be able to store your excess for when the sun isn’t shining or an emergency strikes! That way, it’s like having a second source of electricity at any time – no matter what season it is. It is therefore highly recommended that you purchase a battery with your solar system. If you produce more electricity than you need, you can feed it back into the grid and receive feed-in tariffs.

How much does a 6.6kW solar system with a battery cost?

You need to consider battery backup for your solar power system when looking at the cost. A good rule of thumb is that a 6.6kW unit will usually set you back about $1,300-$2K per kWh in batteries. Although they have been getting cheaper over time with payback times now under 10 years, many still don’t want this expense since there may not always be sunny days.

6.6kW solar system daily output

A 6kW solar power system can generate up to 24 kilowatt-hours of electricity per day, more than the average Australian household uses. A good home with this kind of capacity is perfect for this solar system type as it will only need feed-in tariff payments from surplus energy production. There are times when an extra boost during peak periods may allow you to reduce those nasty prices at night time or on weekends.

The real cost of a good quality 6kw solar system

If you opt for the best solar panels from top manufacturers and a professional installation, you should generally see a return on your investment in around 5 years. For the installation of your panels as well as the cost of the panels themselves you can generally expect to pay around $4,000 to $7,000 depending on the installer and where you stay.

However, it’s a good idea to compare quotes from several installers to find the right option for your requirements. When you invest in solar power that can generate low-carbon electricity & reduce your monthly bills over time for well over 25 years.

Frequently Asked Questions and Answers

Australian home energy consumption is a huge issue for many people. Larger houses use 24-kilowatt hours each day, not including the pool. If you want an environmentally friendly solution, installing solar panels or even using southern facing windows can help! Most roofs in Australia receive around 5-6 hrs worth of peak sunlight every day, so with this information, we know that our 6kW system will produce about 20 kWh to 27+/- kWh per day over the course year from north-facing panels on your roof.

A 6.6kW system with a 5kW inverter will typically generate enough solar to power the average Australian household’s electricity demands in most areas of Australia. Still, it varies depending on where you live! A Melbourne family can expect 23.8 kWh per day from their installation while Brisbane residents get 27 kilowatt-hours (KWH) daily. A few things worth considering before installing an array are physical constraints like roof space availability and how much shade cast by nearby trees might affect production levels. Shading also happens because weather patterns change over time. So, having multiple units operating simultaneously helps negate this problem while still producing plenty every single sunny day.

It’s important to know the power requirements of your home so you can correctly size an inverter. A 6kW solar system in some parts of Australia is often reduced down to 5 kW due to both local legislation and consumer preference. This means that when shopping for one, it helps to know exactly what kind of inverter with pre approved ratings are available on networks near where you live or work.

A modern-day 6kW solar system using 330 watts (W) to 400W modules will consist of 15-19 panels. This number has reduced a lot over the last decade, down from 37 in 2007 for example! This means each one generally measures 1.7m2, so you can expect around 30 – 36 square meters needed on your roof area if installing an entire array with these specifications – or more depending on how it’s laid out and whether tilt frames are required too.



Megan has extensive experience writing about health and life insurance in Australia. Megan has a special interest in health and wellness. She relies on her background in counselling psychology to convey the latest findings in a manner that is most beneficial to ComparingExperts readers. In every article she writes, Megan aims to uphold the standards of the Private Health Insurance Intermediaries Association (PHIAA) which ComparingExpert is part of.

Other Topics

Find out more with our useful guides

Have a question? Ask a specialist.


loading comments...