Best Batteries for Homes with Existing Solar (Retrofit Guide)

Most of Australia's battery market is retrofits to existing solar systems. Here's which batteries work with your setup — and which coupling approach makes sense.

What You Need to Know

This guide covers everything Australian homeowners need to understand about best batteries for homes with existing solar (retrofit guide). We've compiled the most important information to help you make an informed decision.

AC-coupled option (Powerwall 3)

works with ANY existing solar inverter

DC-coupled

check inverter compatibility before proceeding

Sungrow inverter → Sungrow SBR (perfect match)

Fronius inverter → BYD Battery-Box (common pairing)

Budget-friendly retrofit

check compatible hybrid inverter upgrade cost

How This Affects Your Home Battery Decision

Understanding add battery to existing solar is essential for making the right energy investment for your home. The CHBP rebate (currently $372/kWh for the first 50kWh) makes now an excellent time to act — combined with state rebates where available, Australian homeowners can access substantial discounts.

Next Steps

Ready to explore your options? PowerSmarter connects you with SAA-accredited installers who can assess your specific situation and provide competitive, transparent quotes. Get three quotes, compare on the metrics that matter, and make your decision with confidence.

The CHBP has no income limits and no hard expiry date — but installer capacity is real. Start the process now to secure your slot before the current queue extends further.