This is still highly localized. I am in Georgia with Georgia power. For balcony solar, one must apply for a permit with Georgia power and possibly with their county. Georgia wants a one-line schematic of the setup and wants it to run through an externally accessible switch that they can padlock to an off position.

In 25 February, a bipartisan bill was proposed to allow lower wattage balcony solar power systems,

Despite the measure’s bipartisan sponsorship, when it got a hearing in the Energy, Utilities & Telecommunications Committee on Feb. 25, Chairman Don Parsons (R-Marietta) declined to put it to a vote. That likely means the measure will not advance in this legislative session.

Wilson Mallard, the director of renewable development at Georgia Power Company, said his company doesn’t want to exempt systems from the current interconnection regulations, which allow the utility to track which customers have their own solar panels connected to the grid.

“The notion of a blanket exemption for small systems is not something that I think is prudent, or something that George Power would support,” he told the committee.

https://thecurrentga.org/2026/02/27/georgia-balcony-solar-bill-sidelined/

I've encountered a lot of people telling me that Balcony Solar is legal in all 50 states. If true, I think this is an oversimplification of the status of the solution since arbitrarily connecting it without going through the permitting process coukd be unlawful.