HYXiPOWER Retrofit: Can You Add It to Your Existing Solar System? (2026 Guide)
If you already have rooftop solar, you almost certainly don't need to start over to add a battery. The harder question is which battery-and-inverter combination fits what's already on your roof. This guide explains how a HYXiPOWER retrofit works in Australia in 2026, where it's straightforward, and where it isn't.
The short answer
Usually yes, with one condition. Most existing solar systems can have a battery added without replacing the panels. With HYXiPOWER, the condition is the inverter. The HYX-E high-voltage battery series, approved by the Clean Energy Council (CEC) in 2025, requires a HYXiPOWER hybrid inverter. For many homes, a retrofit therefore means keeping your panels and replacing your existing solar inverter with a compatible hybrid unit.
AC-coupled vs DC-coupled: why it matters
There are two ways to add storage to existing solar:
• AC-coupled: the battery has its own inverter and connects alongside your existing solar inverter, which stays untouched.
• DC-coupled: a hybrid inverter replaces your existing one, so panels and battery share the same inverter.
If your panels use microinverters, an AC-coupled battery is the standard route. HYXiPOWER has shown all-in-one systems in both AC- and DC-coupled versions in Australia, but a battery only qualifies for the federal rebate if that exact product is on the CEC's approved list. Your installer should confirm this for the specific model on your quote.
What a HYXiPOWER retrofit involves
• Inverter swap (usual route). A HYXiPOWER hybrid inverter replaces your current string inverter and the battery connects to it.
• Panels stay. Your installer checks that your existing array suits the new inverter.
• One brand, one pairing. The upside is a single supplier for inverter and battery. The trade-off is that the battery is tied to that inverter family.
• Extra work and cost. An inverter replacement adds labour and time compared with a pure AC-coupled add-on.
• Warranties. Ask for written confirmation that the retrofit doesn't affect the warranty on your existing solar equipment.
What to check before you book
The make, model and age of your current inverter
Whether you have a string inverter or microinverters
Single-phase or three-phase supply
Switchboard condition and space for the new equipment
Whether the exact battery and inverter models are on the CEC approved lists
Whether your installer is accredited by Solar Accreditation Australia (SAA) with a battery endorsement
Rebates: what applies to a retrofit in 2026
The federal Cheaper Home Batteries Program (CHBP) gives an upfront discount through Small-scale Technology Certificates (STCs) under the Small-scale Renewable Energy Scheme. You can claim it when adding a battery to existing solar, but conditions apply:
• The battery must be on the CEC approved list and installed by an SAA-accredited installer with a battery endorsement.
• The inverter the battery connects to must be VPP-capable (you don't have to join a VPP). Your existing solar inverter doesn't need to be.
• The existing solar system must comply with state and territory electrical safety rules, but doesn't need to be CEC-listed.
• Batteries must be 5 kWh to 100 kWh nominal, and STCs apply only to the first 50 kWh of usable capacity.
Since 1 May 2026 the STC factor is 6.8 for installs through 31 December 2026, and it steps down every six months. The first 14 kWh of usable capacity earns 100% of the factor, 14–28 kWh earns 60%, and 28–50 kWh earns 15%. The factor is set by your installation date.
In NSW, the Peak Demand Reduction Scheme (PDRS) also offers incentives for connecting eligible batteries to a virtual power plant. Eligibility changed on 1 July 2026, so check current rules at the time of installation. Rebates carry conditions and aren't "free money". The full breakdown is in our rebate guide (linked below).
Is a retrofit worth it?
It depends on how much solar you export at low feed-in rates and how much you pay for evening power. Run your own numbers with our battery ROI calculator.
Why solar and batteries make sense in Australia
Australia has strong sunshine and some of the highest rooftop solar uptake in the world. The Clean Energy Council reports a record 1.89 GW of rooftop solar installed in the first half of 2026, with more than 4.5 million homes and small businesses on solar and more than 700,000 with a battery. Households installed 153 batteries for every 100 solar systems in that period. The CEC also notes Australia now has more rooftop solar capacity than all its remaining coal-fired power stations combined. Solar cuts daytime grid demand, and batteries now do the same for evenings. If you already own the panels, a battery lets you use more of what you generate.
Next steps
Want to know who you'd be dealing with? Read about HYXi, the manufacturer AU Solar Mate partners with. To see which rebates may apply to your home, see our 2026 rebate guide. When you're ready for a system-specific assessment, request a no-obligation quote and we'll check your existing inverter and panels first.
Why Choose AU Solar Mate?
At AU Solar Mate, we handle the entire solar battery installation process — from system design to installation and support.
Our services include:
Battery sizing assessments
Hybrid inverter recommendations
Backup power setup
Compliance management
Monitoring configuration
You work directly with experienced technical specialists — not sales teams.
📞 Call: +61 1800 508 922
🌐 Website: AU Solar Mate
✉️ Email: sales@ausolarmate.com.au
Comments