Fox ESS CQ7 98.28kWh HV Battery Storage System

  
By Fox ESS
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Fox ESS CQ7 98.28kWh HV Battery System

  • Modular 98.28kWh high‑voltage Fox ESS CQ7 battery stack for larger commercial and industrial loads.
  • High‑efficiency LFP chemistry with 90–100% depth of discharge and IP65 protection for indoor or outdoor stand‑mounted installation.
  • Designed to work with compatible Fox ESS hybrid and C&I inverters, with CAN communication and integrated fire protection functions.

Brief description

The Fox ESS CQ7 98.28kWh HV Battery Storage System is a stackable high‑voltage lithium iron phosphate battery solution for commercial and industrial applications. It uses modular CQ7‑80 battery blocks with a nominal 7.02kWh capacity each, configured here as a CQ7‑80‑L14 system (one master plus 13 slave modules) for 98.28kWh of storage at 806.4V nominal.

The system offers high round‑trip efficiency, wide operating temperature ranges, and simple plug‑and‑play installation with CAN‑based communication to Fox ESS inverters and BMS.

Key features

  • 98.28kWh usable storage, expandable – CQ7‑80‑L14 system of one master and 13 slave modules delivering 98.28kWh at 806.4V nominal. 
  • High‑voltage LFP design – Lithium iron phosphate cells with 90% depth of discharge (system‑level) and 100% DOD for CQ7‑80(w) variants, enabling high usable capacity and long cycle life.
  • Robust operating envelope – Wide charge and discharge temperature ranges, optional warm‑up function for low‑temperature operation, and natural convection cooling for reliability.
  • Modular plug‑and‑play installation – Stackable master and slave modules with integrated DC and communication links, IP65 ingress protection and stand‑mount mechanical design.
  • Certified safety and EMC – IEC 62619, IEC 61000‑6‑1/2/3/4 and UN38.3 tested, with integrated fire protection and class I protective class for demanding sites.

Where to use this system

The Fox ESS CQ7 98.28kWh HV Battery Storage System is suited to medium‑scale commercial and industrial storage projects where a compact, modular high‑voltage battery cabinet is required. Typical use cases include peak‑shaving and bill reduction for small factories and warehouses, behind‑the‑meter storage for commercial PV systems, and backup for critical plant or IT loads when paired with compatible Fox ESS hybrid or AC‑coupled inverters.

Because CQ7 is a high‑voltage system, installation, commissioning and integration must be carried out by qualified electricians familiar with Fox ESS equipment and local standards. Energian can help with system sizing and introduce trusted UK partners to design and install complete Fox ESS CQ7 projects.

Technical specifications

General description

  • Product series: CQ7 high voltage storage battery.
  • Battery chemistry: LFP (LiFePO₄).
  • System structure: CQ = CQ‑M (master) + CQ‑S (slave) modules; CQ7‑80 systems built from CQ7‑M‑80 and CQ7‑S‑80 modules.
  • Scalability: Max. 14 modules in series per stack (one master plus up to 13 slaves).
  • Installation location: Outdoor / indoor (stand‑mounted).
  • Cooling method: Natural convection.
  • Communication interface: CAN.
  • Display: CQ7‑S‑80: LED ×1; CQ7‑M‑80: LED ×6.

Electrical characteristics – single CQ7‑80 module

  • Nominal voltage: 57.6V.
  • Nominal capacity: 122Ah.
  • Nominal energy: 7.02kWh.
  • Battery voltage range: 52.2–65.7V.
  • Max. continuous charge/discharge current: 80A / 80A (CC‑CV).
  • Standard charging current: 50A.
  • Constant current and voltage charging cut‑off current: 2A.
  • Peak discharge current (60s): 120A.
  • Depth of discharge: 100%.
  • Short‑circuit current: 2.9kA.
  • Altitude: ≤3000m.

Electrical characteristics – CQ7‑80‑L14 98.28kWh

  • Model: CQ7‑80‑L14.
  • Number of modules: 1 × CQ7‑M‑80(w) + 13 × CQ7‑S‑80(w).
  • Nominal voltage: 806.4V.
  • Nominal capacity: 122Ah.
  • Nominal energy: 98.28kWh.
  • Operating voltage: 104.4–919.8V.
  • Max. charge/discharge current: 80A / 80A (CC‑CV).
  • Standard charging current: 50A.
  • Constant current and constant voltage charging cut‑off current: 2A.
  • Peak discharge current (60s): 120A.
  • Depth of discharge: 100%.
  • Discharge capacity (per Ah rating): 90Ah at −20±2°C @ 1/3C; 104Ah at 25±2°C @ 1/3C; 104Ah at 55±2°C @ 1/3C.
  • Cycle life: ≥6000 cycles at 25°C, 70% SOH.

Operating conditions

  • Operating temperature (standard): Charge 0–55°C; discharge −10–55°C.
  • Operating temperature (warm‑up function on, optional): Charge −25–55°C; discharge −25–55°C.
  • Storage temperature: −10–50°C.
  • Humidity: 5–95% RH, non‑condensing.
  • Altitude: Max. 3000m.
  • Cooling: Natural convection.

Mechanical characteristics

  • Enclosure type: Stand‑mounted stack, IP65.
  • Base module dimensions (W × D): 660 × 360mm.
  • System height vs capacity (CQ7‑80‑Lx):
  • CQ7‑80‑L2: 420mm height; 105.5kg weight; 72.4kg cell net weight.
  • CQ7‑80‑L3: 575mm; 156.0kg; 108.5kg cell net weight.
  • CQ7‑80‑L4: 730mm; 206.5kg; 144.7kg cell net weight.
  • CQ7‑80‑L5: 885mm; 257.0kg; 180.9kg cell net weight.
  • CQ7‑80‑L6: 1040mm; 307.5kg; 217.1kg cell net weight.
  • CQ7‑80‑L7: 1195mm; 358.0kg; 253.3kg cell net weight.
  • CQ7‑80‑L8: 1350mm; 408.5kg; 289.4kg cell net weight.
  • CQ7‑80‑L9: 1505mm; 459.0kg; 325.6kg cell net weight.
  • CQ7‑80‑L10: 1660mm; 509.5kg; 361.8kg cell net weight.
  • CQ7‑80‑L11: 1815mm; 560.0kg; 398.0kg cell net weight.
  • CQ7‑80‑L12: 1970mm; 610.5kg; 434.2kg cell net weight.
  • CQ7‑80‑L13: 2125mm; 661.0kg; 470.3kg cell net weight.
  • CQ7‑80‑L14: 2280mm; 711.5kg; 506.5kg cell net weight.

Protection and certifications

  • Fire protection: Fire protection function: YES.
  • Safety: IEC 62619.
  • EMC: IEC 61000‑6‑1/‑2/‑3/‑4.
  • Transportation: UN38.3.
  • Ingress protection: IP65.
  • Protective class: Class I.

Documents available for download

Shipping and support

Shipping is available to the UK, Ireland, Africa, the Caribbean and worldwide. If a shipping rate is not shown at checkout, please contact us on +44 20 8064 0335 or info@energian.co.uk for a quotation.

UK expert support is available – contact us with any questions or support requests via phone, email or live chat, or visit our office for an in‑person consultation about Fox ESS CQ7 systems and other commercial and industrial energy storage solutions.