Cheaper and simpler to just install a few more panels to compensate?
That only works if you have space left on the roof.
Yeah, its annoying when one of the tiny minority of people who have excess space suitable for solar panels says this. The vast majority of people interested in producing solar energy are severely limited by the amount of space they can use, whether its limited roof space, or an awkwardly shaped roof that offers little space facing in a suitable direction where large rectangles will fit. Those people stand to gain a lot from more efficient panels, or more efficient ways to use them.
Obviously if you don't have the space then you don't have the space, so the comment is not relevant. Don't take it as some sort of attack.
I for one have plenty of roof space left, and yet people are asking me why I don't implement complex efficiency improvements on existing panels.
As for "tiny minority of people who have excess space suitable for solar panels", take just Australia for example. Almost every solar installation has excess roof space.
Tell me your local town and we can look on Google satellite and I'd be wiling to bet that the majority of existing solar installations do not utilise all the roof space. Want to take that bet?