Australia’s rooftop solar boom has already transformed millions of homes into small power stations.
The next is storage. And with governments boosting battery adoption through programs such as the Cheaper Home Battery incentive, the question for both households and installers is shifting to what size, and what kind of battery, makes most sense.
For manufacturers, that shift is prompting a rethink about how storage systems are designed and deployed in Australian homes.
Fox ESS, a rapidly growing player in the global inverter and storage market, is positioning two high-voltage battery systems aimed at slightly different use cases, but built around the same underlying idea: modular systems that can scale easily as energy needs grow.
One option sits at the higher-capacity end of the market. The CQ6 high-voltage battery is designed to deliver large amounts of storage in a relatively compact footprint. A single stack of eight units provides 48 kWh of storage — an ideal capacity for residential applications that qualify for local rebates. At the upper end, a full stack of 14 units delivers just under 84 kWh, offering the greater capacity typically required for commercial installations.
That level of capacity opens the door to larger homes, small commercial sites, or households that want enough stored energy to ride through extended outages or soak up significant amounts of rooftop solar generation.
The system is compatible with single- and three-phase hybrid inverters, including Fox ESS models such as the H3 Pro, H3 Smart, H1-G2, and KH – giving installers flexibility depending on the property’s electrical setup.
Efficiency is another part of the pitch. Fox ESS says the CQ6 delivers more than 95 per cent round-trip efficiency and allows 100 per cent depth of discharge, meaning the full capacity of the battery can be used rather than reserving part of the pack to protect battery life.
For many installers, however, simplicity can matter more than sheer size. That’s where Fox ESS positions its EQ4800 high-voltage battery system.
Instead of a large single stack, the EQ4800 uses a modular design delivering 4.66 kWh per unit, with up to nine modules able to be stacked together for a maximum of about 42 kWh of storage. For both single‑phase and three‑phase applications, installers don’t need to overthink it — just choose the straightforward 42 kWh solution.
Installers can start with a smaller system and add additional modules later as electricity usage changes — for example when an EV arrives in the driveway or a home electrification upgrade increases demand.
The system also carries an IP65 rating, allowing it to be installed indoors or outdoors depending on the property layout, a practical detail in Australian homes where garages, outdoor walls and utility spaces can all become installation sites.
Despite their different formats, the two systems share several design priorities. Both offer high energy density, full depth-of-discharge capability, and compatibility with virtual power plant (VPP) platforms such as Amber and Origin Loop, which allow households to earn additional revenue by helping stabilise the grid during peak periods.
Installation speed is another factor installers tend to care about. Fox ESS says the modular design of both battery systems can shave one to two hours off installation time compared with more traditional battery configurations, a small but meaningful gain for installers juggling busy schedules.
Fox ESS has also been working to deepen its presence in Australia’s solar industry. The company regularly runs roadshows for installers, including recent events in Adelaide, Melbourne and Newcastle, aimed at providing technical training and gathering feedback from the field.
Those conversations can matter. Australia remains one of the world’s most dynamic rooftop solar markets, and battery adoption is widely expected to accelerate as electricity prices remain volatile and households look for ways to capture more value from their own solar generation.
With a local service team of around 30 staff and partnerships with Australian distributors, Fox ESS says its goal is to support installers as much as end customers.
Recognition from industry analysts suggests the company’s local presence is growing. Solar consultancy Sunwiz recently named Fox ESS the Top Growth Leader for 2025, reflecting strong momentum in the Australian market.
For households now considering storage, the key decision is increasingly less about whether batteries make sense, and more about choosing the system that best fits the way their home generates and uses energy.
This sponsored article brought to you by Fox ESS.
