Fox ESS CQ6.6-L6 High Voltage Storage Battery

Brand: Fox ESS
Model: CQ6.6-L6
SKU / part number: ?
Category: Batteries

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Energy and chemistry

Nominal voltage	345.6 V[1]
Rated capacity	?
Nominal energy	39.72 kWh[1]
Usable energy	?
Chemistry	LFP (LiFePO₄)[1]
Cell format	?

Charge and discharge

Continuous charge current	50 A[1]
Continuous discharge current	?
Maximum charge current	80 A[1]
Maximum discharge current	80 A[1]
Peak charge current	?
Peak discharge current	110 A[1]
Continuous output power	?
Peak output	?
Maximum charge voltage	?
Charge cutoff voltage	?
Discharge cutoff voltage	?

BMS and communication

BMS continuous current	?
Communication protocols	CAN[1]
Wireless monitoring	?
Inverter compatibility	?

Operating temperature

Charging temperature	0 to 55 °C[1]
Discharging temperature	-10 to 55 °C[1]
Storage temperature	-10 to 50 °C[1]
Self-heating	?

Mechanical and mounting

Dimensions	360 D × 660 W × 1,040 H mm[1]
Weight	307.5 kg / 677.92 lb[1]
Terminals	?
Mounting / format	?
Enclosure rating (IP)	IP65[1]

Installation (from the manual)

Not documented in the manual

System limits

Maximum parallel units	?
Series connection	?
Maximum system energy	?

Page 1 of 2 · Installation values · ? means nothing is recordedAggregated, often community-reported information, not official documentation. Do not rely on it for installation, purchase or compliance decisions; always confirm values with the manufacturer’s official documentation. Charged Reviews accepts no responsibility for errors.

Charged Reviews · Quick reference

Fox ESS CQ6.6-L6 High Voltage Storage Battery · CQ6.6-L6

Warranty

Warranty term	?
Warranty cycle limit	?
Warranted throughput	?
Capacity retention	?
Cycle rating	?
Estimated throughput	?
Coverage starts	?
Coverage conditions	?
Remedy	?
Labor and shipping	?
Transfer to another owner	?
Registration	?

Certifications and listings

UL 1973	?
UL 9540	?
UL 9540A	?
UN 38.3	?
IEC 62619	?
CE	?

Documents and sources

Fox ESS CQ6.6 datasheet, V1.3, 2026/07/10Official datasheet · Revision V1.3 · Revised July 10, 2026 · Checked Nov 4, 2026https://www.fox-ess.com/Public/Uploads/uploadfile/files/20260812/ENCQ6.6DatasheetV1.320260710.pdf