Home batteries

Fox ESS CQ

Name: Fox ESS CQ
Brand: Fox ESS

11.98–97.44 kWh usable · 2 versions · best for big homes and EVs: expands past 40 kWh

9.8Excellent#3 of 28 battery series we rank · EnergyUpgrade Score out of 10

4.7 out of 5 from 309 owner reviews of Fox ESS home batteries

Warranty: 12.0 yrs
Cycles: 5,040
Works up to: 55°C

Get quotes for this Datasheet Manufacturer's copy

Why it scores 9.8.

Rated on CQ6, its best home version. Each part comes from the datasheet with a published rule; anything not stated scores zero.

How we rate home batteries

Warranty that lasts
10.0 · 30%
Battery warranties end at 10 years or when a set amount of energy has passed through, whichever comes first. This is how many years the warranty covers for a typical home, which cycles its battery about 300 times a year.
Rule: Years of performance warranty at 300 full cycles a year, from the manufacturer's Australian warranty document: 6 years scores 0, the full 10 years or more scores 10.
Weather sealing
9.0 · 25%
Outdoor-rated batteries can go on any wall, including in the weather.
Rule: IP66 or better scores 10, IP65 9, IP55 6, IP54 4, lower 0.
Room to grow
10.0 · 25%
Start with what you need and add modules later, for an EV or electric heating.
Rule: Largest approved configuration, usable kWh: 10 scores 0, 40 or more scores 10.
Heat tolerance
10.0 · 20%
Batteries in garages and on west walls get hot. Higher operating limits mean less throttling.
Rule: Highest operating temperature: 40°C scores 0, 55°C or more scores 10.

Full specifications.

For CQ6, the version we rate. 39 approved models · Australian datasheet

Usable capacity: 11.98–83.86 kWh usable
Per module: 11.98 kWh
Performance warranty: 12 years, 70% capacity retained
Warranted throughput: 60.28 MWh for 11.96 kWh over 12 years
Warranty at 300 cycles a year: 12.0 years
Depth of discharge: 100%
Discharge power (as printed): 11.52 kW
Chemistry: LFP
IP rating: IP65
Highest operating temperature: 55°C
Round-trip efficiency (as printed): >95%
Expansion: Max. 14 modules in series; single pack 5.99 kWh, 11.98 ~ 83.86 kWh
Installation: Outdoor / Indoor (Stand)
Weight: 105.2 kg

Every version (2).

Same series in different sizes, finishes or generations. Check which version is on your quote.

CQ6
11.98–83.86 kWh usable · the version we rate
9.8
Warranty: 12.0 yrsCycles: 5,040Works up to: 55°C Datasheet
CQ7
13.92–97.44 kWh usable
9.8
Warranty: 10.0 yrsCycles: 5,083Works up to: 55°C Datasheet

About the brand

Fox ESS home batteries

Some of the best battery specs and warranties on the list, at a good price, from Australia's fastest-growing storage brand. The trade-off is a short track record.

Read the Fox ESS review

7.7

Brand rating#5 of 9 brands for home batteries