Reviewed by Bidhan Bhuson Roy
How much does a 5kW solar system cost?
A 5kW solar system costs between $4,200 and $6,900 installed in 2026.
This range in price reflects panel and inverter quality, installation labour and roof type. The next size up is a 6.6kW system, which is achieved by adding just 4 extra panels.
Prices usually include GST, the federal solar rebate (based on Small-scale Technology Certificates) and all labour required to install a solar power system.
| System Quality | Price |
|---|---|
| Budget System | $4,200 |
| Mid-Range System | $5,300 |
| Premium System | $6,900 |
Average cost of a 5kW solar system by city
Price differences come down to a combination of system quality, labour costs and local rebates differences. A residential solar system with premium parts may sit at the top of the range, while budget-friendly panels and simple roofs push the cost lower.
Once people understand the cost, the next natural question is panel count.
Power a 5kW solar system produce per day
Production varies with the amount of sunshine, seasonal changes and roof direction.
A 5kW solar system produces 18–22 kWh per day on average.
A north-facing 5kW solar system delivers the best energy output, but east- or west-facing roofs can still perform well across the year.
| State | Output |
|---|---|
| New South Wales | 18–21 kWh/day |
| Victoria | 16–19 kWh/day |
| Queensland | 20–22 kWh/day |
| South Australia | 18–21 kWh/day |
| Western Australia | 20–22 kWh/day |
| Aust. Capital Territory | 17-20 kWh/day |
| Northern Territory | 21–23 kWh/day |
| Tasmania | 14–17 kWh/day |
The output of a 5kW solar setup is strong enough to handle most daytime electricity consumption for small to medium homes, especially when major appliances run during peak sunshine hours. This naturally leads to the next big consideration: system prices.
How much money can I save per year?
Once installed, you can enjoy an average saving of $1,400 – $2,200 per year. That works out to be about $116 to $183 per month.
Savings depend on how much of your own solar electricity you consume instead of exporting. Export earnings help, but self-consumption is where the big gains sit. With typical electricity usage patterns, most Australians reach payback in 3 – 4 years.
Some households that use a lot of energy during peak sunshine hours save even more. Solar feed-in tariff rates vary from state to state, but even low FiTs support strong long-term value.
Whats the average payback period?
The payback period of a 5kW solar system will depend on personal usage habits, the feed-in tariff you sign up for and a few other factors, but on average it’s 3 – 4 years.
Again, this time will depend on the price you pay to install, your average yearly bill and the performance of your system month to month.
Is a 5kW solar system enough for my home?
A 5kW solar system is enough for most 2–3 person households with typical daytime electricity usage.
It suits Australian homes with modest air-conditioning use, and solid daytime consumption. If you work from home or run multiple air cons, you might consider stepping up to a 6.6kW solar system or even a 10kW system for more headroom.
Whether a 5kw solar power system is right for you depends on:
- How much electricity do you use during the day
- Your tariff type (flat vs time-of-use)
- Whether you plan to add battery storage
- Roof direction and shading
- Local feed-in tariffs and export limits
- Future plans like an EV or an all-electric home
If your energy needs are average, this system is probably the right size, offering great value for money and a straightforward path to long-term savings.
👉 Pro tip: For more information on sizing a system for your needs, see our Solar System Sizing Guide.
What can I run with a 5 kW solar system?
A 5 kW solar system is designed for a medium-sized home with 3-4 people living in it. This would cover you for all your basic essential appliances such as your refrigerator, hot water and Wi-Fi, as well as other items you use at peak times such as a dishwasher, washing machine, toaster, TV etc.
Your panels will only be useful to you during the day when they are generating electricity.
5 kW solar system key numbers
| Description | Key numbers |
|---|---|
| Number of panels | 15 – 20 |
| System cost including install | $5,000 – $7,000 |
| Payback period | 4-5 years |
| Potential yearly savings | $1,247 |
| Suits home size | Medium 3 – 5 people |
