How Much Will a 6kW Solar System Save Me?

Updated: April 18, 2022

With households straining to meet their daily needs, 6kW solar systems have proved to be an excellent way to save on electricity costs.

On average, a top of the range 6kW solar system can save you about $400 per electricity billing cycle, with an average range of between $200 to $800.

6kW systems are ideal for medium to large households, and can help offset power bills for your business as well.

How Much Will a 6kW Solar System Save Me

Here is a table showing how much money homeowners can save with a 6kW solar system in different states in Australia.

State 6kW Solar System CostElectricity Cost Feed-In-Tariff RateSelf-Consumption RateIRRAnnual Savings Payback Period
Adelaide $4,54031c7c60%42%~$2,000~2 Years
30%16%~$1,000~5 Years
Hobart $6,30027c8c60%26%~$1,200~3 years
30%19%~$550~5 Years
Perth $3,90028c7c60%46%~$1,500~2 Years
30%26%~$900~3.5 Years
Sydney$4,75025c5c60%32%~$1,100~3 Years
30%15%~$500~4 Years
Melbourne$4,50027c6c60%36%~$1,330~3 Years
30%30%$880~3.5 Years
Brisbane $4,75018c5c60%24%~$930~4 Years
30%22%~$700~2.5 Years
Canberra $4,56020c7c60%28%~$1,050~3 Years
30%14%~$990~6 Years
Darwin$8,50026c8c60%22%~$1,400~4 Years


The values listed above exclude state-based solar rebates and grants

The average daily power consumption is assumed to be 25kWh

6kW Solar System Key Numbers

The table below provides you with a 6kW solar system key numbers to help you understand how much money you can save with the system.

Solar system costApproximately $13,000
Australian Government incentive About $3,000
Investment on a top-quality solar system Approximately $7,500
Yearly electricity bill savings About $2,000
Payback time for the systemAround 5 years
Solar system lifespan25 years
Total profit/savings for the 25 years$50,000+

Average Cost of a 6kW Solar System

Installing a 6kW solar system will cost around $6,190. The cost may vary depending on the quality of the panels and the state you live in.

Things you should consider when buying a solar system include its quality, product and performance warranties, and the reputation of the solar provider to make sure you get maximum returns on your investment.

How Much Power Does a 6kW Solar System Generate?

A 6kW solar system generates around 22,6 kWh per day with about 20 standard-size solar panels. This is enough to offset your home’s electricity bill. However, the power output varies depending on your location, quality and positioning of the system, and shading issues.

What Factors Affects How Much Money You Can Save With a 6kW Solar System

Your daily power consumption and solar feed-in-tariffs can significantly affect the amount of money your 6kW solar system can save you.

Solar Feed-In-Tariffs

Several years back, solar feed-in-tariffs used to be one of the main reasons why homeowners chose to go solar. Today the story is different. The feed-in-tariff rates are very low and voluntary. This means your electricity retailer does not have to pay you for your surplus solar power.

Daily Solar Power Usage

The amount of money a 6kW solar power system can save you depends on your daily power usage. The best way to optimise your system is by consuming most of the electricity your solar system produces.

The rates retailers offer for excess solar power range from 5 cents to 13 cents/kWh. With a 5kW solar system, you can save an average of 22 cents to 30 cents per kWh, plus GST.

How Can I Optimise Self-Consumption To Get the Most Out of My Solar System?

As aforementioned, optimising your solar power usage is the best way to benefit fully from your system. Here is how you can optimise your solar power consumption.

Install the Right Size of Solar System for Your Home

If you are conversant with solar systems, you probably know what size will suit your home. Average homeowners in Australia install 5kW to 7kW solar systems for medium to large households. People with smaller homes install 3kW solar systems.

It is important to know the size that can run your home without too much surplus power, as the goal is to use most, if possible, all the energy produced by your system. Your solar provider should help you choose the right system size depending on your home size and needs.

Install the Right Size of Solar System for Your Home

Understand Your Power Consumption Profile

Solar panels produce the most energy during peak sun hours (around 12noon to 2pm). You can use most of the power generated during this time by running large appliances like laundry machines, air conditioners, dryers, water heater, pool, etc.

Understanding Your Power Consumption Profile (1)

How Long Does a 6kW Solar System Last?

A good quality solar system lasts about 25 to 30 years, which is also the time when the panel’s performance warranty expires. Most panels still exhibit an efficiency of 80% to 85% after 25 years, which means you can still use them for a few more years before installing a new system.

Are You Ready To Install a 6kW Solar Power System?

If you wish to install a 6kW solar system but you do not know where to begin, do not panic. With the numerous solar providers on the market, it is not easy to find a reliable one, especially if you have a busy schedule.

Use This FREE Service quickly matches you with three local solar providers voted #1 by previous users in your area. It’s really easy!

All you need to do is :

  1. Scroll up to the top of the page and enter your ZIP Code in the blue form at the top of the page.
  2. Give us a few details about your solar installation or replacement job plus some contact information.
  3. Your solar job details are forwarded on to the closest three solar installers all voted best priced who will also price your solar job.

In slightly under three minutes, you’ll have your installers!

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Yes. a 6kW solar system is enough to power your home, but this depends on your location and power consumption rate. If you live in areas receiving low sunshine, and your power consumption is high, you may need a larger system to meet your daily electricity needs.

A 6kW solar system has around 20 to 24 solar panels. If you choose high-end panels with higher efficiencies, you will only need a few panels on your roof.