You can trace out the circuits on a traditional solar panel. They aren't complex devices. If someone managed to hide some kind of control chip in there and also some sort of connectivity to trigger it then my hat is off to them.

I would worry more about the inverters, including microinverters.

Also consider that if someone is doing industrial sabotage on that scale it would be much easier to attack the fossil fuel and nuclear power plants and their enormous computer controlled generators. Even hydroelectric would be susceptible. Or maybe attack the substations. There is nothing unique or special about solar panels that makes them a good target, and their highly distributed and diverse nature actually makes them more difficult.

Other targets may be more appropriate, but:

> and their highly distributed and diverse nature actually makes them more difficult

Distributed doesn't make it harder, if/when there's a common failure mode. See e.g. this with the power grid which is obviously as distributed as any PV connected to it: https://arstechnica.com/security/2025/01/could-hackers-use-n...

Depends if you can exploit the system directly from the Internet or if you need to break into hundreds of thousands of individual networks before you can trigger the attack.

I could see subterfuge in the inverters, but aren't panels themselves electrically very simple? I would think a rogue device within the panel itself would be apparent.

It's still worth examining the panels in minute detail. I just think it would be a ton more difficult to hide much functionality within a panel.

Reds under beds, again?

The S in IoT stands for security

This isn’t a thing. As in - try sitting in on a power purchase negotiation where the minutiae of every conceivable risk is debated for hours on end and this never even comes up.