Fox ESS EP5 5.18-20.8 kWh High Voltage Solar Battery System

By Fox ESS

Installation & VAT Refund

Delivery available

Empower Your Energy: Fox ESS EP5 5.18-20.72kWh Battery System

The Fox EP5 is the first slimline and wall-mountable battery offered by Fox ESS, and it is compatible with all Fox ESS single and 3-phase AC-Coupled and Hybrid Solar Inverters. With a Fox Junction Box, additional batteries can be installed in parallel allowing for a maximum storage capacity of 20.72kwh, this battery unit is an ideal companion for your energy needs. This can be doubled up to 8 units/41.44kWh when paired with the Fox H3 PRO hybrid inverter. 

Installation available - please call 020 8064 0335 or email for a quote.


  • Modular Design: Allows for maximum flexibility in storage.
  • Scalability: Additional batteries installable in parallel with FE-JUNBOX-HV, enabling a maximum storage capacity of 20.72kWh (41.44kWh when paired with the Fox H3 PRO hybrid inverters).
  • Effortless Installation: Plug-and-play solution, saving valuable time for installers.
  • Efficiency: Boasts > 95% charge/discharge efficiency and 90% depth of discharge.
  • Durable Cycle Life: Batteries designed for a cycle life of over 4000 cycles.

Warranty: The standard warranty is 5 years, extendable to a total of 10 years upon successful registration on the Fox website.

Delivery: 2-3 WORKING DAYS delivery within the UK (delivery times may vary to the Highlands, islands, and Northern Ireland).

      Detailed specifications:

      Battery Type: Lithium Iron Phosphate (LiFePO4)
      Nominal Capacity: 5.18kWh
      Nominal Voltage: 192V
      Operating Voltage: 174-219V
      Max. Charge/Discharge Current: 27A
      Recommended Charge Current: 13.5A
      Peak Discharge Current (60sec): 65A
      Peak Charge Current (5sec): 32.4A
      Charge Temperature: 0 ~ +50°C
      Discharge Temperature: -10 ~ +50°C
      Storage Temperature: 0 ~ +35°C
      Battery Pack Round-Trip Efficiency: >95%
      Protection Level: IP65
      Weight: 50.5kg
      Size:  380*625*147mm
      Cycle Life: >4000
      Depth of Discharge: 90%

      In the Box:

      • 1...4 X Fox ESS EP5 5.18kWh High Voltage Solar Battery,
      • 1 X Fox ESS EP5 5.18kWh High Voltage Solar Battery User's Manual.

      Frequently Asked Questions:

      Don't know an answer to your question? Call us on 020 8064 0335 or email