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Fox ESS CQ16 (16.07kWh) High Voltage Storage Battery for H3 Plus Range
Fox ESS CQ16 (16.07kWh) High Voltage Storage Battery for H3 Plus Range
Fox ESS CQ16 (16.07kWh) High Voltage Storage Battery for H3 Plus Range
Fox ESS CQ16 commercial storage — 16.07 kWh a module, four modules minimum, 723.15 kWh at full commercial scale.
Commercial storage is a different problem from domestic storage. The question is not whether the evening peak can be covered but how much of the site's load profile can be shifted, and that means capacity measured in hundreds of kilowatt-hours rather than tens.
About the Fox ESS CQ16 commercial storage
The CQ16 is Fox's answer: 16.07 kWh a module at 51.2 V and 314 Ah, with 240 A maximum charge and discharge and a 470 A peak for a full minute. It is the largest module Fox make and it exists for the H3 Plus.
It is not sold as a single battery. The smallest system is four modules and one BMS box — 64.28 kWh — and the largest is 45 modules across three BMS boxes, 723.15 kWh. No single stack takes more than fifteen modules in series.
Unlike the rest of the Fox range this is an indoor product: IP20, floor mounted, with intelligent air cooling rather than natural convection.
What each stack size gives you
Four modules and a BMS box is the smallest system Fox will commission; fifteen is the most in one stack:
Which inverter will run this battery?
This is a Fox ESS commercial high-voltage cabinet system, built for the H3 Plus and managed by a separate BMS box.
How many of this module each Fox inverter family takes, from Product Compatibility Fox ESS UK 2026, the module count range for this inverter family:
Inverters we stock that will run it:
Stack rules, cabling and what else the job needs
The details that decide whether this battery suits the system:
- Minimum system: 4 × CQ16 and 1 BMS box, 64.28 kWh. Maximum: 45 × CQ16 and 3 BMS boxes, 723.15 kWh.
- Maximum fifteen modules in series per stack. The rated energy range for one stack is 64.28 to 241.05 kWh.
- The BMS box is a separate order — it is not part of this listing.
- 51.2 V nominal a module, 46.4 – 58.4 V operating, 314 Ah. 157 A recommended discharge, 240 A maximum, 470 A peak for 60 seconds.
- Only compatible with the H3 Plus series. It will not run on an H1, KH, H3, H3 Smart or H3 Pro.
- Indoor only: IP20, intelligent air cooling, floor mounted. Charge 0 to 55 °C, discharge −10 to 55 °C.
- 390 × 235 × 810 mm and about 128 kg a module. Plan the floor loading and the route in.
- Round-trip efficiency is quoted above 92 %, lower than the domestic Fox modules, and cycle life is 6,000 at 0.5 C and 90 % depth of discharge to 70 % state of health.
Where this battery earns its place
The CQ16 commercial storage is specified most often for these jobs.
Things worth knowing about this listing
- A CQ16 system is a minimum of four modules plus one BMS box, 64.28 kWh. The largest is 45 modules and three BMS boxes, 723.15 kWh, and no single stack takes more than 15 modules in series.
- The BMS box is not part of this listing and is ordered separately.
- Compatible with the Fox H3 Plus series only.
Fox ESS CQ16 technical data
Ordered with this battery more often than anything else
A battery is one part of a storage system. These are the parts our customers add most often:
Questions we get asked about this inverter
Can I buy one?
You can, but one will not make a system. Fox's minimum is four modules and a BMS box. Tell us the inverter and the target capacity and we will quote the whole set.
Does it work with my H3 Pro?
No. The CQ16 is compatible with the H3 Plus series only.
Is the BMS box included?
No, it is ordered separately. One BMS box covers a stack; a 45-module system needs three.
Can it go outside?
No. It is IP20 and indoor only, with intelligent air cooling.
How much can I use?
14.46 kWh a module, at a 90 % depth of discharge.
Documents, advice and trade pricing
Every datasheet, certificate, installation manual and warranty document we hold for this product is in the Documents tab below. See the rest of our battery range, our hybrid inverters and our solar panels, or email sales@clearraysolar.com if you would like us to check a battery and inverter pairing before you order.
Build your complete solar system
Everything you need in one place.
- Inverters
- Batteries
- Mounting Systems
- Cabling & Accessories
- Protection Devices
Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.
