The Fox ESS CQ16 is a high-voltage, stackable LFP battery module providing
16.07kWh of usable-rated capacity per unit, purpose-built for commercial and industrial energy
storage systems. Modules connect in series to build scalable battery banks from 64.28kWh up to 241.05kWh,
supporting a 90% depth of discharge and >92% charge/discharge efficiency. Designed exclusively
for use with the Fox ESS H3 Plus inverter range, the CQ16 is a floor-mounted, indoor-only battery with
intelligent air cooling and IP20 protection.
16.07kWh
Capacity per Module
240A
Max Charge/Discharge
241.05kWh
Max System Size
Indoor Installation Only
The CQ16 is only suitable for indoor installation and is not water resistant. It must be installed by a qualified electrician in a dry, ventilated location away from flammable or explosive materials.
System Build Requirements
A minimum of 4 battery modules (64.28kWh) is required per system, in stacks of up to 4 modules each. Every system requires one Fox ESS CQ16 BMS Control Box, plus one Battery Base and one Cable Pack per stack — these are sold separately.
Inverter Compatibility
The CQ16 is compatible exclusively with the Fox ESS H3 Plus inverter range. Each of the H3 Plus's three battery ports can support a CQ16 system of up to 45 battery modules.
Stackable High-Voltage Architecture
Modules connect in series with a 51.2V nominal voltage each, allowing installers to scale a single system from 4 modules (64.28kWh) up to 15 modules (241.05kWh) without changing the underlying battery technology.
90% Depth of Discharge
A high usable capacity ratio means more of the rated 16.07kWh per module is actually available for daily cycling, improving the economics of commercial self-consumption and peak-shaving applications.
Intelligent Air Cooling
Built-in intelligent air cooling control manages module temperature automatically across a 0–55°C charge and −10–55°C discharge range, supporting consistent performance in plant room environments.
Compact Floor-Mounted Footprint
At 390 × 235 × 810mm per module, the CQ16 stacks vertically in a small floor footprint, making it practical to fit substantial storage capacity into constrained commercial plant spaces.
LFP Chemistry for Safety and Longevity
Lithium Iron Phosphate (LiFePO₂) cell chemistry offers strong thermal stability for demanding commercial duty cycles, backed by a dedicated fire protection module in each unit.
Certified for Commercial Deployment
Tested to IEC 62619 for stationary battery safety, IEC 61000-6-1/2/3/4 for EMC, and UN38.3 for transport, giving specifiers a recognised compliance basis for C&I projects.
| Battery Module |
| Model |
CQ16 |
| Nominal Voltage |
51.2 Vdc |
| Operating Voltage Range |
46.4 – 58.4 Vdc |
| Nominal Capacity |
314 Ah |
| Nominal Energy |
16.07 kWh |
| Max. Charge/Discharge Current |
240 A |
| Recommended Discharge Current |
157 A |
| Peak Discharge Current |
470 A @ 60s |
| Depth of Discharge |
90% |
| Environmental |
| Storage Temperature |
−10 to 50°C |
| Operating Temperature |
Charge: 0–55°C / Discharge: −10–55°C |
| Humidity |
5 – 95% (no condensation) |
| Altitude |
3000 m |
| Installation Location |
Indoor only |
| Construction |
| Display |
1 × LED (battery) |
| Scalability |
Max. 15 modules in series |
| Cooling Method |
Intelligent air cooling |
| Ingress Protection |
IP20 |
| Fire Protection Function |
Yes |
| Warming Function |
No |
| Dimensions (W×H×D) |
390 × 235 × 810 mm |
| Weight (approx.) |
128 kg |
| Cell Net Weight |
88.8 kg |
| System Scalability |
| Minimum System Size |
4 modules / 64.28 kWh |
| Maximum System Size |
15 modules / 241.05 kWh |
| Max. Modules per Stack |
4 |
| Compatible Inverter Range |
Fox ESS H3 Plus |
| Max. Modules per Inverter (3 ports) |
45 |
| Certification |
| Safety |
IEC 62619 |
| EMC |
IEC 61000-6-1/2/3/4 |
| Transportation |
UN38.3 |
How much capacity does one CQ16 module provide?
Each CQ16 module provides 16.07kWh of nominal energy with a 90% usable depth of discharge, at a nominal voltage of 51.2Vdc.
What is the minimum and maximum system size?
A CQ16 system requires a minimum of 4 modules (64.28kWh) and can scale up to 15 modules (241.05kWh) per system, built up in stacks of up to 4 modules each.
What else do I need to build a complete CQ16 system?
Every system needs one BMS Control Box, plus one Battery Base and one Cable Pack for each stack of up to 4 modules — these are sold as separate items.
Which inverters is the CQ16 compatible with?
The CQ16 is designed exclusively for the Fox ESS H3 Plus three-phase hybrid inverter range, connecting via the inverter's high-voltage battery ports.
Can the CQ16 be installed outdoors?
No — the CQ16 is rated IP20 and is for indoor installation only. It is not water resistant and must be kept in a dry, ventilated plant space.
What battery chemistry does the CQ16 use?
The CQ16 uses Lithium Iron Phosphate (LFP) cells, chosen for thermal stability, and includes a dedicated fire protection module per unit.
