Battery 101
Life in regional WA means planning for all kinds of conditions - hot summer nights, storms, and changing seasons. Solar alone only works when the sun’s shining. With a battery, you have energy stored and ready to use when you need it most.
How to compare battery storage systems
When deciding on a battery, the cheapest system isn’t always the most affordable option. Comparing a battery’s cost against its total energy throughput (how much energy it will deliver over its lifetime) will help you determine which system delivers the best value.
To calculate energy throughput, multiply charging cycles by battery size. E.g. 3,500 charging cycles × 10kWh battery = 35,000 kWh total throughput.
A charge cycle is one full round of charging and discharging a battery — for example, using 100% of its stored energy. The number of charge cycles a battery can handle affects how long it will last. When comparing batteries, it’s worth looking beyond just warranty terms like energy output; consider other factors too, such as storage capacity, physical size, installation options, and compatibility with your solar system.
Should I get battery?
Before choosing a battery system, ask your installer the following:
- Are you SAA-accredited? Installers must be accredited by Solar Accreditation Australia to safely install batteries.
- Is the battery on the CEC approved list? Only approved batteries meet required safety and quality standards.
- Can I access the WA Residential Battery Scheme Your installer must be an approved vendor to claim WA government incentives.
- Can this battery and solar system provide backup power during an outage? Not all batteries support backup — your installer should confirm if yours does and that it’s set up correctly.
- What warranty and support are included? Look for at least a 10-year warranty and clear after-sales support.
No, but having a battery lets you get more value from your solar system and makes you eligible for Community Wave benefits.
No, joining Community Wave is free. However, your battery installation must meet Horizon Power’s standards, which your installer can advise on.
No, not right now. We only receive visibility of your battery’s performance. In the future, we may choose to share some control in exchange for financial rewards.
Only if your battery system is designed for backup and complies with Horizon Power’s technical requirements. Not all battery systems provide backup power so make sure you speak with your installer.
You can store excess solar energy during the day and use it at night, helping you reduce your energy bill. By joining Community Wave, you will also be eligible for our Buyback Bonus rebates and be part of a more sustainable community.
No, from 1 July 2025, Community Wave is required to connect new solar or battery systems to the Horizon Power network.
Horizon Power acknowledges the Traditional Custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders past, present and emerging.
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