Contemporary Amperex Technology Ltd's products have passed rigorous security reviews by US departments and businesses, The Paper reported today, citing the Chinese battery giant’s response to US utility firm Duke Energy’s announcement that it disconnected CATL’s industrial-scale batteries at a Marine Corps base earlier this week over security concerns.

The batteries that CATL sells in the US are passive devices without communication interfaces meaning that they cannot be controlled by external electrical signals, the Ningde-based company said. CATL does not collect, sell or share data in any way and the allegations that its batteries pose a potential security threat are false and misleading.

Duke Energy has severed the connection with industrial-scale battery systems produced by CATL at the North Carolina Marine Corps base Camp Lejeune as some US lawmakers raised concerns about potential security threats, the Charlotte, North Carolina-based company said on Dec. 6, without mentioning how long the batteries will remain offline.

Demand for CATL’s batteries in the US has been growing in recent years. The firm has supplied 2.1 gigawatt-hours of batteries to three energy storage projects run by utility firm Southern California Edison and it has more than 500 megawatt hours of projects in operation or under construction in Texas.

CATL is also linking arms with US energy management platforms Primergy Solar and FlexGen to provide them with batteries and energy storage systems.