Large glass sliding door set - extra solar coating?

[osprey]

The plan is to have a 2 panel, triple glazed sliding door set (3 x 2.4m, U-value <1) on the new extension. This will be facing SW.  Would it be worth getting an extra solar coating to reduce heating effect?

 

I was considering it for double glazing, but I imagine triple glazing reduces the issue anyway.  This would be in addition to the normal e-glass coating, of course.

 

Also, for anybody who has had it done - is the additional tint noticeable?

 

I would probably have voiles to reduce glare, anyway.

 

 

[osprey]

Ah, I changed my search terms and founf that this has been asked a few times before....