Solar batteries can help you get more out of your solar panels. In Australia, a home solar system can pay itself off in seven to nine years, or even as quickly as five years if you receive a solar rebate from your state or territory government to help reduce costs.4
Given enough time, solar batteries will most likely be cost-effective in the long run. Plus, they help reduce your reliance on fossil fuels and reduce your impact on the environment.
The cost of solar battery systems and battery installation for homes and small businesses will vary based on the type of battery and its size, though battery prices can range from $2,000 to $10,000 or more.
Smaller lead-acid batteries are the cheaper option, but only provide 3-5 kilowatt-hours (kWh) of electricity, while larger capacity liquid flow batteries (10-20kWh) will cost much more. However, be sure to check for potential rebates on your solar power system in your state or territory; for example, Victoria offers solar battery rebates for every postcode in the state for eligible households.5
Solar batteries will last for different lengths of time, typically ranging from 2 to 10 years. While solar batteries do eventually die, proper maintenance and use can help prevent your system from needing a replacement battery before its expected life cycle ends.
For example, charging your battery too frequently can shorten its lifespan, so be sure to only charge it as needed and recommended.
You should find a solar battery storage solution that matches both the output of your solar panels and your consumption needs, not necessarily just the biggest battery that you can get.
As an example, if you have a 5kWh solar system and consume 20-25kWh of electricity, you might install a 13.5kWh home battery system, as noted in the NSW Home Solar Battery Guide.6
You should contact a professional to assess what size and type of solar batteries suit your needs.
Yes, businesses can use solar batteries to store power and use less electricity from the local network. Businesses can also use feed-in tariffs to earn a little bit of money back for the electricity they generate, which can help offset electricity bills.
Most solar batteries for houses and businesses have a warranty, which can last for a few years, though what’s covered can differ between manufacturers. It’s important you understand what’s covered by your warranty and what you need to do so your solar inverter and battery last as long as possible.
It’s possible, but difficult, to go completely off-grid with a solar battery system. You need to ensure that your solar panels generate enough power to meet your needs and that your batteries can store enough power for those rainy days.
Yes, you can recharge a home solar battery. You should read the owner’s manual and talk to the installer to understand how to recharge it properly, so you don’t negatively affect its performance.
1 NSW Home Solar Battery Guide. Department of Planning, Industry and Environment, Government of New South Wales. 2020. Accessed May 2022.
2 Solar PV and Batteries. Department of Planning, Industry and Environment, New South Wales Government. Accessed May 2022.
3 NSW Home Solar Battery Guide. Department of Planning, Industry and Environment, Government of New South Wales. 2020. Accessed May 2022
4 Section 1: Why install a solar electricity system at home? Solar Panel (PV) Buyers Guide. Solar Victoria, Department of Environment, Water, Land and Planning, Australian Government. Last reviewed April 2022. Accessed May 2022.
5 Solar battery rebate. State Government of Victoria – Solar Victoria. Last reviewed April 2022. Accessed May 2022.
6 NSW Home Solar Battery Guide. Department of Planning, Industry and Environment, Government of New South Wales. 2020. Accessed May 2022.