Estonian Foreign Intelligence Service warns of China-related risks in energy system

Estonia's Foreign Intelligence Service warned in 2024 that Chinese technology is infiltrating Estonia's power grids. At the same time, the US administration is preparing to ban foreign inverters that connect solar farms to the grid, fearing China could use them to cut off electricity supplies.

Estonia's Foreign Intelligence Service issued a clear warning in 2024: Chinese technology is finding its way into Estonian power grids, which represents a serious security risk.

US and Estonia's concerns align

At the same time, the US administration is preparing to ban foreign inverters, devices that connect solar farms to the power grid. Washington's primary concern is that Chinese manufacturers could use such devices as a means to cut off electricity supplies at critical moments. Inverters are an integral part of solar energy systems, converting the direct current produced by solar panels into alternating current suitable for the power grid.

The Estonian Foreign Intelligence Service's 2024 warning shows that the threat is not merely hypothetical; Chinese manufacturers' equipment has already spread widely throughout Europe, including Estonian, energy infrastructure. Cybersecurity experts have repeatedly stressed that backdoors in connected devices could give foreign powers the ability to remotely disrupt or completely cut off electricity supplies.

Why this matters particularly for Estonia

Estonia, as a small country with an open economy, is particularly vulnerable to disruptions in energy infrastructure. Additionally, Estonia's power grid is undergoing major changes, at the beginning of 2025, it left the BRELL ring and connected to the European continental power grid. While this transition enhances Estonia's energy security regarding Russian influence, it introduces new cybersecurity challenges, especially given the growing dependence on smart and connected energy technology.

The Estonian Foreign Intelligence Service's warning is therefore timely: just as the country is integrating more deeply with Western energy infrastructure, critical attention to the origin and security of equipment becomes increasingly important.