Adding a Battery to Your Existing Solar System in New South Wales
If you already have solar panels in New South Wales, 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 NSW solar systems.
What You Need to Know
Use Your Surplus Solar
NSW'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 NSW households through the evening peak and into the night, significantly reducing grid dependency.
Get Your Instant Battery Upgrades Estimate
Obligation-free pricing for South Australian homeowners. Compare local installers and check rebate eligibility in minutes.
- Personalised estimate delivered via email and SMS
- All applicable rebates and STCs calculated automatically
- SAA-accredited local installers only
- No sales pressure — you decide if and when to proceed
What Are You Looking For?
Step 1 of 4
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 NSW 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 NSW rebates?
Battery-specific rebates vary. A Jousto estimate will check current NSW 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.
Related Guides
Ready to Compare Battery Upgrades Options in SA?
Get a personalised, obligation-free estimate in minutes. We match you with SAA-accredited local installers who understand South Australian homes and rebate programs.