The Fox ESS CS2800 2.74kWh HV Battery is a lithium iron phosphate (LiFePO4) battery designed for use in conjunction with a Fox ESS Energy Cube CM2800 Master Battery to expand your home solar power system’s storage capacity. It has a usable capacity of 2.74kWh and can be connected in series with up to 5 additional slave batteries for a total capacity of 16.44kWh.
Unlike the CM2800 Master Battery, the CS2800 does not have a built-in Battery Management Unit (BMU) and relies on the communication with the master battery for control and safety.

This battery requires a MINIMUM of 2 modules to work (Master + Slave), This battery can have a MAXIMUM of 7 modules in a stack (1x Master + 6x Slaves)

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Fox ESS CM2800 2.74kWh

Fox ESS CS2800 2.74kWh HV Slave Battery

Fox ESS CS2800 2.74kWh Datasheet

  • Usable capacity of 2.74kWh
  • Scalable design: Up to 5 slave batteries can be connected in series with a CM2800 master battery for a total capacity of 16.44kWh
  • High efficiency with round-trip efficiency of 94%
  • Safe and reliable LiFePO4 chemistry
  • Easy to install with a plug-and-play design
  • Wide operating temperature range: -10°C to 55°C
  • Long lifespan: Over 6000 cycles at 80% depth of discharge
  • Warranty: Typically 10 years