Redefining Two Core Concepts and Greatly Narrowing the Scope of Control

An inverter will no longer be classified as “foreign‑produced” and will be removed from the restricted list if it qualifies for the Section 45X Advanced Manufacturing Tax Credit under the US Internal Revenue Code — even when manufactured overseas by foreign companies. Originally designed as a subsidy instrument to draw clean‑energy capacity and support domestic manufacturing in the United States, Section 45X now serves as a major exemption channel. In essence, the US is leveraging subsidy policies to bind supply chains instead of imposing blanket bans on overseas products.

Whereas the original rule broadly covered all inverter devices with network‑connectivity features, the updated version explicitly regulates only utility‑grade grid‑tied inverters. Wired communications such as Ethernet are formally included in the assessment of connectivity capability. Non‑grid‑tied inverters that cannot connect to the public utility grid are fully exempted; rectifiers and other one‑way power‑conversion equipment are also struck off the controlled list. To put it simply: low‑power residential off‑grid energy‑storage inverters are largely unaffected, while only grid‑connected models for large‑scale power stations are subject to compliance reviews.