COMPAREAustralian buying guide · Home batteries
AC coupling can add storage beside an existing solar inverter, which may avoid replacing equipment that still works. The trade-off is another conversion stage and a more complicated discussion about monitoring and backup behaviour.
Quick recommendations
One best-fit option per brand, selected using this guide's rules. Fewer choices appear when fewer brands qualify. Product details can change independently of the editorial update above; check each profile's source and verification dates before purchase.
Research-based recommendation · catalogue evidence
Existing solar systems and modular AC-coupled expansion
Watch: Backup operation requires controller and balance-of-system hardware beyond the battery modules.
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Research-based recommendation · catalogue evidence
Guide fit balanced against listed planning price: $8,500. Smaller retrofit systems wanting an AC-coupled battery with phase-specific Australian approvals
Watch: The fixed 7 kWh approved family is too small for many whole-night air-conditioning or large-home targets.
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Research-based recommendation · catalogue evidence
Existing solar homes wanting an AC-coupled battery, backup, EV charging and EMS ecosystem
Watch: Current Australian model and approval details are not sufficiently exposed for the family name alone to establish eligibility.
View product →Things to consider
Record its exact model, phase count, age and export-control arrangement. Compatibility statements made at brand level are not enough.
Solar energy may be converted from DC to AC and back into battery DC before being used later. Real system efficiency depends on both inverters and the operating point.
During an outage, the battery system must manage or curtail the existing solar inverter safely. Confirm whether the proposed combination can recharge from solar while islanded.
Product comparison
The match score measures fit against this guide's published rules (55 baseline points plus up to 42 for matched preferences). Missing prices earn no affordability points. Equal scores mean equal rule matches, not equal tested performance. Prices are dated planning evidence, not live offers.
Scores use recorded catalogue attributes, not measured performance. Budget and premium selections compare remaining brand finalists, so they are alternatives to the overall pick.
| Product | Price | Warranty | Key specifications | Guide match | Actions |
|---|---|---|---|---|---|
| EnphaseIQ Battery 5P FlexPhase | $15,000 | 15 years / conditions apply |
| 97/100 | View productCompare |
| ATMOCEM-ELV Battery | $8,500 | Check the current Australian system warranty |
| 81/100 | View productCompare |
| SAJAS3 AC-Coupled | $13,250 | Check the current Australian product warranty |
| 90/100 | View productCompare |
 FranklinWHaPower X | $15,000 | Check current Australian product and throughput terms |
| 80/100 | View productCompare |
 sonnensonnenBatterie Evo | $11,250 | 10 years |
| 78/100 | View productCompare |
Frequently asked questions
Not automatically. Grid interaction, backup operation, metering and control must be checked for the exact equipment.
It normally adds conversion steps, although the installed-system difference depends on equipment and how energy is used.
Not necessarily. Avoiding replacement is one of the main reasons to consider AC coupling.
Ready to narrow it down?
