Overview
iStore is an Australian energy brand best known for heat pump hot water systems, who expanded into battery storage with the iStore Battery range. The 15kWh unit is their flagship residential offering — 15kWh of LFP storage in an AC-coupled configuration that works alongside any existing solar inverter.
For Australian homeowners who prefer to support local industry and want a straightforward AC-coupled storage addition to an existing solar system, the iStore Battery is a practical, well-supported choice — particularly in Queensland, where iStore has the deepest installer coverage.
Pricing & Installation
Indicative installed cost: $12,000–$16,000
The $8,500 battery price is competitive for 15kWh capacity ($567/kWh). AC coupling means no inverter replacement, so for homes with existing solar, the incremental installation cost is primarily labour.
iStore’s Queensland-based installer network is strong. Coverage in VIC, NSW, SA, and WA is present but thinner. Confirm installer availability in your area before committing.
Performance & Output
5kW continuous / 10kW peak output. Standard for this size class. AC coupling adds minor conversion losses but round-trip efficiency remains at 95%.
Grid-forming capability is supported, enabling whole-home backup during grid outages.
Storage Capacity
15kWh suits most Australian 3–4 person households for overnight coverage. The 3-unit expansion to 45kWh provides substantial capacity for larger properties or EV households.
Backup & Blackout Protection
Grid-forming, whole-home backup, sub-20ms switchover. IP55 rated for sheltered outdoor installation.
Operating range: -10°C to 45°C — adequate for most of Australia but narrower than some competitors in extreme environments.
Compatibility
AC-coupled. Compatible with virtually all solar inverters (Fronius, SMA, SolarEdge, Enphase, Sungrow, and others). No inverter replacement required.
Additionally compatible with iStore hybrid inverters for tighter integration in new installations.
Warranty & Support
10-year product warranty. iStore’s Australian head office manages warranty claims with direct local support — a genuine advantage over import-only brands.
Verdict
The iStore Battery 15kWh is a solid, Australian-supported product well suited to Queensland homeowners with existing solar who want straightforward AC-coupled storage. Its brand identity resonates with buyers who value Australian business. For those in other states where installer density is lower, confirm availability before proceeding.
Best for: Queensland homeowners with existing solar, buyers who prioritise Australian brands, straightforward AC-coupled retrofits.
Frequently Asked Questions
Is iStore battery manufactured in Australia? iStore is an Australian brand with design and commercial headquarters in Australia. Manufacturing utilises Australian-specification cells and components. Confirm current manufacturing details with the brand at time of purchase.
Does iStore work with my existing Fronius/SMA inverter? Yes — AC coupling means the battery connects to your existing AC wiring without affecting your current inverter setup.
Is iStore eligible for state rebates? Yes — iStore batteries are on approved product lists for VIC Solar Homes, SA Home Battery Scheme, QLD and ACT programs as of 2026.
