Fox ESS competes on price. Here is what you actually get for it.
Fox ESS is usually the brand quoted when someone wants storage without Powerwall money. The pricing is genuinely lower, and the trade-offs are real rather than fatal.
Here is what the two most-quoted Australian configurations cost installed, and who they suit.
At a glance
Quick answer: the EP11 at 10.4 kWh runs about $8,650 to $9,200 installed in Australia, and the EQ4800 at 18.64 kWh about $15,000 to $16,000 installed. Warranty is 10 years on those series and 12 years on the CQ6. It is a battery stack, so it pairs with a compatible inverter rather than having one built in.
What Fox ESS costs installed
The EP11 is the volume seller: about 10.4 kWh for roughly $8,650 to $9,200 fully installed. That is meaningfully cheaper per usable kWh than the premium brands.
Step up to the EQ4800 with four modules and you are at about 18.64 kWh for roughly $15,000 to $16,000 installed, which is a lot of storage for the money.
You will see Fox ESS packages advertised from around $5,999 installed. That figure is not tied to a specific storage size in the sources we checked, so treat it as a starting-from number and get the usable kWh in writing before comparing it with anything.
Is Fox ESS worth it?
It suits you if the budget is the binding constraint and you would otherwise not get a battery at all, or if you want maximum kWh per dollar and are relaxed about brand.
It suits you less if you want an all-in-one unit, the biggest installer network, or the most polished app. Those are the things the premium brands charge for, and for some households they are worth paying for.
See what a battery costs on your roof, with your rebate and payback figures.
Frequently asked questions
The EP11 at 10.4 kWh runs about $8,650 to $9,200 fully installed in 2026. The EQ4800 at 18.64 kWh runs about $15,000 to $16,000 installed. Some Australian installers advertise Fox ESS packages from around $5,999, but that figure is not tied to a stated storage size, so confirm the usable kWh.
10 years on the EP11 and EQ4800 series, and 12 years on the CQ6 series.
No. The Fox ESS battery stack pairs with a compatible inverter rather than having one integrated, so make sure the inverter is included when you compare a Fox ESS quote against an all-in-one like the Powerwall 3.
On cost per usable kWh it is one of the cheaper credible options in Australia, which is why it gets quoted so often. The trade-offs are a separate inverter, a smaller installer network and a less polished app than the premium brands. If a battery only stacks up for you at the lower price point, it is a reasonable buy.
