The FOX ESS CQ7-S (w) is the slave expansion module for the CQ7 high-voltage system. Each slave adds 6.96 kWh of LFP storage to a stack initiated by a CQ7-M (w) master module, scaling capacity in 6.96 kWh increments up to 14 total modules (one master plus thirteen slaves equals 97.44 kWh). The "(w)" cold-climate variant carries the same heating element as the master, keeping the entire stack thermally matched for -25 degrees Celsius operation. Single-LED status indicator (the master holds the BMS and comms), IP65, 100% depth of discharge.

Note: CQ7-S (w) slaves must only be stacked with CQ7-M (w) masters. Do not mix with non-heated CQ7-M.

Key Features

• Slave expansion module for the FOX ESS CQ7 high-voltage residential storage system
• 6.96 kWh LFP capacity per module, 100% usable depth of discharge
• Built-in heating element matches the master, extending stack operating range to -25 to +55 degrees Celsius
• Adds capacity in 6.96 kWh increments without extra control electronics
• Up to 13 slaves stack with one CQ7-M (w) master for up to 97.44 kWh
• Single LED status indicator (master module retains the BMS and communications)
• IP65 rated, indoor or outdoor stand mount
• IEC 62619, UN38.3 and IEC 61000-6 EMC certified

Specifications