I have had 2 SMA Sunny Tripower inverters for four...

I have had 2 SMA Sunny Tripower inverters for four years in Jamaica. In this time I have had 3 replaced and a fourth has just died. Each time it has taken a long time to have these replaced under warranty. At this point my installer has suggested to abandon these SMA inverters, which are still under warranty, and replace them with another brand, since I lose too much in down time and duties and taxes with the replacements. Very disappointed.
Finally got rid of these SMA inverters! Still under warranty! VERY disappointed