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U.S. energy officials have launched an investigation after discovering unauthorized communication equipment embedded within Chinese-manufactured solar power inverters connected to critical infrastructure grids across the country.
This discussion explores the key communication technologies used by inverters, including wired and wireless systems, power line communication (PLC), standard protocols, and the integration of Internet of Things (IoT). Many solar inverters are equipped with wired communications such as RS485, Ethernet, or CAN bus.
In order to provide grid services, inverters need to have sources of power that they can control. This could be either generation, such as a solar panel that is currently producing electricity, or storage, like a battery system that can be used to provide power that was previously stored.
Energy security experts warn that coordinated remote manipulation of these devices could destabilize power grids and trigger widespread blackouts, particularly as Chinese-made inverters now control a substantial portion of renewable energy capacity in the United States and Europe.
With Seoul and Busan serving as pivotal hubs, and companies like Samsung SDI, LG Chem, Hyosung Heavy Industries, Doosan Heavy Industries & Construction, and Kokam leading the charge, the nation is set to continue its impactful contribution to the energy storage sector.
Busan, South Korea's second-largest city, is strategically positioned as a port city, making it an ideal hub for energy storage manufacturers. Renowned for its advanced logistics and export infrastructure, Busan offers local energy storage manufacturers an effective gateway to international markets.
Less than a decade ago, South Korean companies held over half of the global energy storage system (ESS) market with the rushed promise of helping secure a more sustainable energy future. However, a string of ESS-related fires and a lack of infrastructure had dampened investments in this market.
Environmental concerns regarding battery production and disposal are increasingly under scrutiny, prompting a shift towards sustainable practices in the industry. The global market relevance of South Korea's energy storage sector is significant, as it is one of the leading countries in battery technology.
Every solar panel and battery connected to the U.S. energy grid relies on a device few people ever consider: the power inverter. In May of 2025, U.S. experts found undocumented communication modules and secret radios embedded in some Chinese-manufactured solar inverters and battery systems.
U.S. officials have discovered undisclosed communication devices on the power inverters of some Chinese-manufactured solar panels, Reuters reported today based on anonymous sources within the federal government. The inverters are part of the hardware package connecting solar arrays to the power grid.
This investigative article exposes the discovery of undocumented communication devices hidden in Chinese-made solar inverters, creating unprecedented vulnerabilities in global power grids.
In a discovery that has sent shockwaves through the cybersecurity community, U.S. energy officials have found undocumented "rogue" communication devices hidden inside solar power inverters imported from China.
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