The FCC solar inverter ban takes effect July 28, 2026, in a market where foreign companies already supply 93% of United States inverters

FCC solar inverter ban explained

The FCC solar inverter ban took effect on July 28, 2026, when the Federal Communications Commission Public Safety and Homeland Security Bureau, acting in a public notice, added foreign produced power inverters to its Covered List, the security registry created under the Secure and Trusted Communications Networks Act of 2019 that already barred equipment from Huawei and ZTE. A power inverter turns the direct current a solar panel or battery makes into the alternating current a home or the grid uses, and the rule covers any model that also lets someone control, monitor or collect data on it remotely, over Wifi, cellular or Bluetooth.

The ban blocks only new equipment authorizations for inverter models not yet approved. It does not affect any inverter already installed, any model already approved before July 28, 2026, or any federal government purchase. Foreign produced does not mean owned by any one country. It means built outside the United States, regardless of who owns the manufacturer, so a German, Austrian, Spanish or Chinese built model is covered the same way. A manufacturer can ask the Department of War or the Department of Homeland Security for a Conditional Approval, clearing a specific model if that department decides it does not pose the stated risk.

A possible future risk, not one regulators have found in service

The national security determination behind the ban argues that because inverters connect remotely, a foreign government could turn them off or use them to collect and send out data as more inverters join the grid. That reasoning describes what could happen, not something found happening. A separate Department of Energy review in January 2026 examined 30 Chinese made inverters and found no evidence of hidden or malicious hardware, and the July 2026 determination does not cite or dispute that finding. It argues from the general possibility of a shutdown, not a discovered problem.

Only 7% of United States inverters are built at home

In 2020, only 7% of the inverters sold in the United States came from United States headquartered manufacturers, leaving 93% supplied by companies based elsewhere, the same import dependence this rule is meant to shrink.

The Department of Energy own 2022 supply chain assessment says the domestic market relies heavily on inverters from companies headquartered in Europe and Japan, without naming China as the reason. Canary Media names the companies. Chinese companies, mainly Sungrow and Chint Power Systems, hold about 60% of the United States market for the larger inverters used in utility, commercial and industrial projects, while SMA Solar of Germany, Fronius of Austria and Power Electronics of Spain supply most of the rest. In the smaller home market, SolarEdge of Israel with the United States companies Enphase Energy and Tesla supply about 80% of demand.

More than 46 gigawatts already runs through inverters

More than 46 gigawatts of grid capacity already runs through inverters, an amount the determination compares to the output of 46 nuclear power plants. Citing the Energy Information Administration, it counts more than 22,237 megawatts of new utility scale solar and 13,357 megawatts of new battery storage added between January and November 2025, with 58,658 megawatts more forecast for the next 12 months.

What investors are saying

John Miller, an energy transition policy analyst at TD Cowen, reacted the day after the rule was announced.

In our world, investors are currently seeing this as kind of a non-event.

John Miller, Managing Director and Energy Transition Policy Analyst at TD Cowen. Source 5.

Models already authorized before July 28, 2026, keep shipping and installing exactly as before, and a manufacturer can still seek a Conditional Approval to clear a future model.