Gridly
Overview
iStore is a product of Solargain, one of Australia’s larger solar companies with origins in Perth, Western Australia. The brand was built around hot water heat pumps before expanding into solar and battery storage. The iStore Battery is, in hardware terms, based on Huawei’s LUNA2000 residential battery architecture - the same technology platform used in Huawei’s FusionSolar system, which is unavailable to Australian consumers under the Huawei brand directly.
The proposition is straightforward: Huawei’s manufacturing quality and battery technology, delivered through an Australian company with local warranty, support, and installation services. For buyers who want Huawei cell quality without dealing with Huawei Australia directly, iStore is the only pathway.
Huawei hardware: what it means
Huawei is one of the world’s largest technology companies and a major manufacturer of solar inverters and battery storage systems globally. The LUNA2000 battery uses lithium iron phosphate cells manufactured at scale, with the quality control and engineering investment that major volume manufacturing enables.
In Australia, Huawei’s residential solar hardware has accumulated a positive installer track record. SolarQuotes installers have rated Huawei hardware favourably on build quality and reliability. The iStore Battery inherits this manufacturing foundation.
What iStore adds on top:
- An Australian company as the warranty-backing entity - local claims, local escalation
- Solargain’s installation and service network
- Local technical support rather than offshore manufacturer support
- An Australian-recognised brand on the warranty document
The Backup Box gap
This is the most important specification nuance to understand. Standard iStore Battery installations support solar self-consumption, time-of-use tariff optimisation, and remote monitoring. They do not provide backup power during a grid outage unless the optional Backup Box is also installed.
The Backup Box is the island-forming device that maintains power supply when the grid disconnects. Without it, the battery and inverter shut down when the grid drops - a safety requirement of grid-tied systems by default.
If backup capability is a purchase requirement, ask your installer for an all-in quote that includes the Backup Box from the start. Adding it retrospectively is possible but more expensive than including it at initial installation.
100% DoD and capacity
15kWh at 100% depth of discharge is a strong capacity figure for the price. Most households at 3–4 persons use 15–20kWh per day. A full charge of the iStore Battery covers overnight consumption from evening through to morning solar generation for most households in this size range.
The 5kW continuous output - 5kW per two-module stack - supports essential loads during backup: refrigerator, LED lighting, reverse-cycle split system, and internet. Running multiple high-draw appliances simultaneously will approach or exceed the 5kW ceiling; load management during backup is the practical approach.
Service footprint consideration
Solargain’s history and strength is in Western Australia. The company has operated there since 2005 and has a dense installer network and service infrastructure in WA. The eastern states operation is genuine but less deeply established.
For WA buyers, iStore is among the most service-backed battery options available. For NSW, VIC, and QLD buyers, service response times and local installer availability should be confirmed with Solargain before purchase - not because service is unavailable, but because it may not match the WA experience.
Comparison with alternatives
| iStore Battery 15 | BYD HVM 16.6 | Sungrow SBR160 | |
|---|---|---|---|
| Usable capacity | 15kWh | 16.6kWh | 16kWh |
| Continuous output | 5kW | 8kW | 8kW |
| Warranty | 10 years | 10 years | 10 years |
| Supply price | ~$8,500 | ~$8,500 | ~$8,000 |
| Inverter lock-in | iStore/Huawei | Multiple brands | Sungrow only |
| Backup standard | No (Backup Box extra) | Depends on inverter | Depends on inverter |
The BYD HVM delivers 1.6kWh more capacity and 3kW more output at the same price, with broader inverter compatibility. The iStore’s advantage is the Australian support wrapper and Huawei cell quality for buyers who specifically value those attributes.
Who should buy the iStore Battery 15kWh
The iStore Battery is the right choice for buyers who want Huawei battery hardware quality delivered through an Australian company with local warranty and support, are comfortable with the Huawei inverter requirement, and have confirmed that the Backup Box is included in their quote if backup capability is needed. It is particularly well-suited to Western Australian buyers where Solargain’s service density is strongest.
For buyers who want maximum output and inverter flexibility, the BYD HVM offers more. For buyers who specifically value Australian brand accountability and Huawei manufacturing quality, iStore is the only product in Australia that combines both.
