Inverter replacements by manufacturer - invalidate warranty?

[SolarCity]

I've noticed some manufacturers are replacing inverters themselves rather than sending the inverter to the installer. I wonder whether this could void the warranty for some firms?

 

[jason121]

ABB have started doing this. They have 3 of mine to change. Its been 3 weeks still not done

 

[f0ster]

I have had three ABB inverters go down and it has taken them 6 weeks every time.

 

[SolarCity]

That's not good.

We've been having huge issues with SMA. Will never used them again and will advise all future customers how poor their customer service is.

 

[f0ster]

I have had a lot of SMA inverters replaced, it was the same fault every time and one installation had all four replaced four times.
the fault was due to a batch of transistors that were giving trouble. but credit to them they got them sorted, and have been no more trouble