Adding a Battery to Your Existing Solar System in South Australia
If you already have solar panels in South Australia, adding a battery is often the smartest next step to maximise your investment. Instead of exporting surplus solar at low feed-in rates, store it and use it in the evening. Here's everything you need to know about battery upgrades for existing SA solar systems.
What You Need to Know
Use Your Surplus Solar
SA's feed-in tariffs are typically 5–8c/kWh. Using that same energy in the evening at 30–40c/kWh grid rates delivers 4–6× more value per kWh.
Most Existing Systems Are Compatible
AC-coupled batteries (like Tesla Powerwall) work with virtually any existing solar system. DC-coupled options may require a hybrid inverter upgrade.
Evening and Overnight Coverage
A 10–15kWh battery covers most SA households through the evening peak and into the night, significantly reducing grid dependency.
Get Your Instant Battery Upgrades Estimate
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- All applicable rebates and STCs calculated automatically
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Frequently Asked Questions
Can I add a battery to my existing solar without replacing the inverter?
In most cases yes, using an AC-coupled battery like the Tesla Powerwall, which connects to the AC side of your existing system. DC-coupled batteries (like Sungrow SBR) require a compatible hybrid inverter.
What battery size should I add to my existing solar?
For most 3–4 bedroom SA homes, 10–15kWh of storage covers evening usage and overnight needs. Your Jousto estimate will assess your specific usage patterns.
Do battery upgrades attract any SA rebates?
Battery-specific rebates vary. A Jousto estimate will check current SA and federal programs relevant to your upgrade.
Will a battery work with my existing inverter brand?
Compatibility depends on your inverter brand and model. Jousto's estimating system will flag compatibility when you submit your quote.
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