Have you been thinking about getting a solar system for your home or business? If you’re considering a 5kW system, we’ve got all details on one of the country’s most popular solar system sizes.
In this guide, Canstar Blue breaks down everything you need to know about 5kW solar systems in Australia. We’ll discuss the benefits of these solar systems and help you determine which option is best for you.
On this page:
- How many panels in a 5kW solar system?
- How much kWh does a 5kW solar system produce?
- 5kW solar system output per day
- How much does a 5kW solar system cost?
- 5kW solar system with battery price
- How much will a 5kW solar system save me?
- How long before a 5kW solar system pays for itself?
- Should you get a 5kW solar system?
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How many panels in a 5kW solar system?
A solar system’s size is determined by its power output, which is measured in kilowatts (kW) and kilowatt hours (kWh).
A 5kW solar system is a popular choice for Australian homes because it’s a good size for most households. A 5kW system may have between 12 to 20 solar panels, although SolarQuotes puts the number at 12 panels.
In addition, 5kW systems are easy to install and maintain, so they’re a great choice for people who want to go solar but don’t want to put in a lot of effort. Plus, they’re environmentally friendly, so you can feel good about using them.
How much kWh does a 5kW solar system produce?
A 5kW solar system in Australia will produce around 20 kWh of electricity per day on average. This number can vary depending on the time of year and location, but it’s a good estimate for what you can expect from this size solar system. Of course, there are other factors that can impact the electricity output of a solar system, such as shading from trees or buildings and the age and efficiency of the panels.
In general, a 5kW system in Australia will produce its peak amount of electricity in the summer months when there is less cloud cover and inclement weather. Even in winter, a system of this size will usually produce enough energy to cover the basic needs of a home with two to four occupants, provided the panels are maintained and are working to maximum efficiency.
5kW solar system output per day
According to SolarQuotes, a 5kW solar system will output approximately 20kWh per day, covering the average Australian household’s energy consumption of 16kWh – 18kWh per day. These averages depend on various contributing factors; for specific figures for your own energy use in regards to solar, consult a solar installer.
Compare solar plans and prices
Here are some of the cheapest solar-specific deals from the retailers on our database. These costs are based on the Ausgrid network in Sydney but prices will vary depending on your circumstances. We show one product per retailer, listed in order of lowest price first. Annual price estimates assume general energy usage of 3900kWh/year for a residential customer on a single rate tariff. Price estimates exclude solar feed-in tariff credits. These are products from referral partners†. Our database may not cover all deals in your area, and please check retailer websites for up to date information.
Here are some of the cheapest solar-specific deals from the retailers on our database. These costs are based on the Citipower network in Melbourne but prices will vary depending on your circumstances. We show one product per retailer, listed in order of lowest price first. Annual price estimates assume general energy usage of 4000kWh/year for a residential customer on a single rate tariff. Price estimates exclude solar feed-in tariff credits. These are products from referral partners†. Our database may not cover all deals in your area, and please check retailer websites for up to date information.
Here are some of the cheapest solar-specific deals from the retailers on our database. These costs are based on the Energex network in Brisbane but prices will vary depending on your circumstances. We show one product per retailer, listed in order of lowest price first. Annual price estimates assume general energy usage of 4600kWh/year for a residential customer on a single rate tariff. Price estimates exclude solar feed-in tariff credits. These are products from referral partners†. Our database may not cover all deals in your area, and please check retailer websites for up to date information.
Here are some of the cheapest solar-specific deals from the retailers on our database. These costs are based on SA Power network in Adelaide but prices will vary depending on your circumstances. We show one product per retailer, listed in order of lowest price first. Annual price estimates assume general energy usage of 4000kWh/year for a residential customer on a single rate tariff. Price estimates exclude solar feed-in tariff credits. These are products from referral partners†. Our database may not cover all deals in your area, and please check retailer websites for up to date information.
How much does a 5kW solar system cost?
Solar has come a long way over the past decade or so – both in technology and price. According to the National Solar Choice Price Index, the average price of a 5kW system in December 2024 is $5,150 Australia-wide: however, this can vary between states. Generally, you can expect to pay between $4,100 up to $8,000 for a good quality 5kW solar system, factoring in available subsidies and rebates. That’s why it’s always worth speaking with multiple solar installers first and comparing quotes.
There are many factors that contribute to the upfront cost of solar, but three key things that will impact the price you pay are: your location, your chosen installer and the type of panel or brand you opt for. While it is a huge upfront cost, if you’re looking to significantly cut back on the amount you pay for electricity over many years, then it’s one of the best investments a homeowner can make.
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5kW solar system with battery price
A Canstar Blue survey conducted between March and September 2024 revealed that the average cost of a solar battery in Australia is currently $5,516. However, according to Solar Quotes the most popular brands and models can cost between $11,000 and $15,500, including installation.
The overall price will depend on the brand of battery you go with, and the complexity of the installation. It will also depend on the battery size. For example, Solar Choice advises low to medium users with a 6.6kW solar system will likely require a battery with 10kWh to 13.5kWh of capacity.
How much money will a 5kW solar system save me?
A good-quality 5kW solar system that has been properly installed can save a medium-sized household up to $580, according to SolarQuotes. This depends on a range of factors, including how much electricity your household consumes, what you pay for electricity, and your location.
Other factors that need to be taken into consideration are:
- Weather: Do you live in an area with an abundance of sunshine all-year-round, or are rainy days typical?
- Roof positioning: The direction and positioning of your roof plays a big part in how much sun your panels are capable of soaking in. North is generally considered best.
- Age and efficiency of panels: Solar panels wear down over time, (a process known as degradation), and older or less-efficient panels won’t be saving you as much as you’d hope.
- Battery storage: Are you looking to install a solar battery with a 5kW system, and if so, will the storage unit be big enough to power your home through the night?
How long before a 5kW solar system pays for itself?
On average, solar system costs have fallen across Australia over the past 10 years or so. SolarQuotes estimates that going solar with a 5kW system means a payback period of four years and 11 months. Again, this will depend on all the factors previously discussed, and whether your plan is to rent the property out or live there yourself.
Most solar installers will provide an array of insights during the consultation and quoting stage, meaning you’ll be left with a pretty clear picture of what timeframe you’re up against.
Should you get a 5kW solar system?
There are available solar rebates and initiatives on offer that can help offset some of the initial costs.
You will need to make sure that your roof can support the weight of the solar panels and that your home gets enough sunlight. If you live in an area with a lot of trees or other buildings, you might not get enough sun to make solar a good investment.
Once you’ve made the decision to invest in solar, then it’s time to work out the cost of installation and maintenance. Solar panels can be expensive, so you need to ensure you can afford the upfront cost. That being said, solar panels are usually a great investment, especially for homeowners who have a long-term outlook for their property.
Do your research, speak to the professionals and ask as many questions as you need to. Finally, Canstar Blue has listed the best-rated solar electricity providers, which you can check out by clicking the button below.
Compare Solar Energy Providers
Original reporting by Jared Mullane
Image Source: bombermoon/Shutterstock.com
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