[lkbm]

This isn't 20% cheaper—it's 20% more efficient. Do they require 20% mounting systems or inverters? If not, you're getting more power without increasing the spending, regardless of which part is the expensive part.

I'd totally believe that more power requires more expensive inverters, but on its own, your comment doesn't make sense.

[GaggiX]

These solar panels are probably much more expensive than the standard Mono-Si ones right now, they lack scale of production.

[neltnerb]

Sure, but the GP's premise was that the panels were effectively free.

I agree that they're sure to have a price premium, and reliability will need testing...

[GaggiX]

I'm pretty sure he was talking about the standard mono-SI ones, so (in his opinion) having 20% more efficiency doesn't matter much.