How Much Does a Solar Battery System Cost? 2025 Update after Federal Battery Rebate

A 4 kW solar system is suitable for a family of 3 or 4 and is generally adequate to meet the electricity needs of a residence ranging from 93 to  185 square metres. This system can power appliances and electronics during daylight hours, depending on the energy consumption. Installation costs for a 4 kW solar system in Australia can range between $4,000 and $7,000, depending on factors such as location and the quality of the system. Recently, I had the pleasure of dealing with Arise Solar, and I must commend them for their exceptional customer service.
Cairns, although located at the extreme north of Queensland, has seen good awareness of the solar in the last few years. Therefore, the benefit of a variety of solar products as well as the quality solar installations is available to the customers based in Cairns. Smart House Solar is one of the best solar companies in Cairns with a lot of satisfied customers enjoying their savings from their solar panel system. This makes us one of the best solar companies in Cairns to look forward for your solar installation. 15kW solar systems are a great system size for homes with high levels of energy consumption or businesses with small to middling energy needs – provided that they have sufficient roof space to install one. This article takes you through (almost) everything you might commercial battery sumner want to know about 15kW solar systems, including how much space they take up, how much they cost, and how much energy you can expect them to produce.

10kW Solar power system is a great investment for your business or household. With a high-quality inverter and 40 Tier-I monocrystalline solar panels, the 10kW solar power system provides seamless output without fail, irrespective of the weather. Reduce your power bill and keep your premises powered without worrying about grid outages. 10kW solar power system is a beneficial investment for anyone looking for a big residential solar power system or small commercial solar power system. Smart House Solar will get you the best price for 10kW solar power system.
The good news is we only use solar battery installers with proven experience. The Solar Choice Price Index measures the cost of solar power systems on a dollar per watt ($/W) basis. This pricing metric helps consumers and industry stakeholders understand the average prices of residential solar  system installations across different regions in Australia. The price per watt is a key factor in comparing the cost-effectiveness of solar power systems, considering the total cost of installation divided by the system’s capacity in watts.
With the potential to reduce electricity bills, provide energy independence, and reduce your carbon footprint, this system is an excellent investment in 2025. Before selecting a 13.2 kW solar battery system, it’s essential to assess your energy consumption. A 13.2 kW system is  ideal for households or businesses with higher energy demands. Calculate your current usage by reviewing your electricity bills and ensure that the system you choose meets your energy needs while leaving room for potential future expansion.

In 2025, several Australian states offer solar battery rebates, including New South Wales, Victoria, and South Australia. These incentives can reduce the cost of installation significantly, making solar battery systems more affordable for homeowners. The solar panel company you engage to perform the installation is another price variable. A company that employs their own installation team will likely cost more, and may well provide a better installation. A company that has been in business for a long time with a reputation for installing high-quality systems will inevitably cost more – though this is a cost most likely well worth paying extra for. This is a Queensland Government program that provides rebates of up to $3,500 for the installation of solar PV systems and battery storage.
Townsville is considered as one of the best places for solar panel system installation as it gets an average of 5.5 hours of clear sunshine daily for a solar panel system to generate optimum output. Considering this average; a 6.6kW solar power system is expected to generate around 26kW – 28kW per day. Queensland has abundance of sunshine; hence it is considered as one of the best places for solar panel system installation. Considering an average of 4-5 hours of daily sunshine; a 6.6kW solar power system is expected to generate around 24kW – 26kW per day. In such cases, your yearly saving will reduce to the extent the power is not consumed by you and sent back to the electricity grid. In short, if you consume solar power, you save 25c (rate at which you are billed) and if you are not able to consume solar power, you save 10c (feed in tariff rate).

Standard installation comprises of installation done on a single storey house with a tin roof. Price of a 6.6kW Solar System for your home in Brisbane will vary for installations on a double or multi-storey house or on a house with a tile, decramastic roof. A 6.6kW Solar System price in Brisbane will also vary depending on the brand of panels or inverter.
Our solar power solutions are designed to help you make the most of Queensland’s sunny climate while enjoying significant energy savings. How many solar panels your system will have is determined by the manufacturer and wattage size of the solar panel. The higher the wattage of each individual panel, the fewer solar panels you’ll need.
13kW solar systems are a great system size for homes with high levels of energy consumption or businesses with small to middling energy needs – provided that they have sufficient roof space to install one. This article takes you through (almost) everything you might want to know about 13kW solar systems, including how much space they take up, how much they cost, and how much energy you can expect them to produce. It also touches on whether a 13kW system is a good investment for your home or business. These high efficiency 440W Canadian solar panels are ideal for structural design on commercial rooftops, and are better for electrical design on medium-sized commercial inverters. Ground mounted or utility solar systems over 100kW will often use the larger dimension commercial solar panels. As solar energy grows in popularity, Brisbane homeowners are increasingly looking to install solar power systems to reduce their electricity bills and get extras like batteries for electric vehicles.

However, if you wait one year, you will only earn 72 STC certificates worth $2826. You can use our solar rebate calculator to find out how much your rebate will be worth in 2022. In March 2022, you would acquire 82 STC certificates for a 6.6kw at a cost of $39.25 each, resulting in a rebate of $3218.5 that you would be paid for. The benefits of having less panels means that you can fit a bigger system on your roof with the same amount of space. A bigger panel will generally give you slightly better watts per meters squared due to less aluminium framing. Most 6.6kw systems come with a 5kw inverter, and they are all pretty much pre-approved for grid connections all around Australia.
A 370w solar panel multiplied by 18 equals 6.6kw, depending on the wattage size of the solar panel brand. The higher the individual panel’s wattage, the fewer solar panels you’ll need. Another consideration is not just how much energy you use, but also when you use it. For example, homeowners who are rarely at home will need a larger system to make the same savings as someone who uses the majority of their electricity throughout the day. This is because energy produced and used by your home is more valuable than energy produced and sold to an energy company via a feed in tariff.
After payback, the battery continues to supply low-cost energy for its remaining lifespan (typically 10–15 years), lowering electricity bills and carbon emissions. The cost to produce electricity from solar panels decreases the longer the system operates. If you skimp on the price of your system, you need to ensure that the Clean Energy Council has approved the panels and inverter you buy. If you are not buying CEC approved products, you will not receive your solar rebate, this could instantly add between $1,500 – $2,000 to the cost of a 5kW system. There are many solar rebates and incentives available to Queensland residents who qualify to offset some of the cost of purchasing a solar system. However, The current Queensland government solar rebate scheme is expected to end on the 31st of December 2030.