Ah, okay! It's quite possible that it's not widespread, I know because I had a course on renewable energies in my university studies (electrical engineering).

I think he's just pointing out that you'd expect people to have heard of them if they're in fairly widespread use. I don't recall having heard of them before, but it seems like you already know the main points about them.

Undisciplined

And if they’re already in use today, why are they the solar panel industry’s best-kept secret?

Not being able to watch the video now, I don't quite understand this question. I'm not aware of the use of this type of panel, but I don't think it's a well-kept secret. The only thing I know about these panels is that they have a little less performance but a much lower cost.

tech

How the Next Big Solar Panel Tech is Already Here

> And if they’re already in use today, why are they the solar panel industry’s best-kept secret?

Not being able to watch the video now, I don't quite understand this question. I'm not aware of the use of this type of panel, but I don't think it's a well-kept secret. The only thing I know about these panels is that they have a little less performance but a much lower cost.

