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US warns that hidden radios could be embedded in solar-powered infrastructure

U.S. officials have said that solar-powered highway infrastructure, including chargers, weather stations at roadside, and traffic cameras, should be scanned to detect rogue devices, such as hidden radios, secreted within batteries and inverters.

The Federal Highway Administration of the U.S. Department of Transportation issued the advisory late last month amid an escalating campaign by government officials to address the use of Chinese technology on America's transport infrastructure.

The four-page note on security, which was reviewed, stated that undocumented radios were found "in certain power inverters manufactured by foreign manufacturers and BMS," meaning battery management systems.

The note was not reported before and did not mention where the products that contained undocumented equipment were imported from. However, many inverters in China are manufactured.

U.S. officials are increasingly concerned that devices and electronic systems used to manage rechargeable batteries could be laced with rogue communication components, which would allow them be remotely manipulated on Beijing's instructions. Reports in May indicated that American officials were concerned when experts discovered rogue communications devices in certain Chinese inverters or batteries. In the same month, Green Power Denmark reported that unaccounted for electronic components were found in imported equipment used by Denmark's energy network.

The U.S. Cybersecurity and Infrastructure Security Agency forwarded questions to the Department of Transportation. In a statement, the Department of Transportation said that the advisory summarizes public and non-classified reporting in order to ensure agencies implement practical mitigation measures for transportation operators. The Cybersecurity and Infrastructure Security Agency was contacted for further questions.

In a press release, the Chinese Embassy in Washington stated that it was against "the distortion and smear" of China's accomplishments in the energy infrastructure field.

Federal Highway Administration's warning in its advisory cited federal- and state-level reports about "undocumented cell radios" that were found inside inverters or batteries, and that national assessments had determined they could pose a danger.

In an advisory dated August 20, the device was used to power various highway infrastructure in the United States, including signs and traffic cameras. It also included weather stations and solar-powered visitor centers and warehouses. It cited risks such as simultaneous outages and data theft.

The alert recommended that authorities inventoried inverters throughout the U.S. Highway System, used spectrum analysis to scan devices for any unexpected communications, disabled or removed any undocumented Radios, and ensured their networks were segmented properly.

Washington also expressed concern over the presence on U.S. roads of Chinese cars, fearing that Chinese companies may collect sensitive data when testing autonomous vehicles there. As part of its crackdown on Chinese vehicle hardware and software, the Commerce Department published rules in January that effectively ban nearly all Chinese vehicles from the U.S. marketplace by the end of 2026. (Reporting Jana Winter. Raphael Satter, David Shepardson and Chris Sanders contributed additional reporting; Stephen Coates and Chris Sanders edited the story.

(source: Reuters)