I think the reason people are experiencing issues with the SolarEdge inverter is due to improper inverter selection by the Tesla design people.
I’m having an 11.56Kw system designed. Tesla originally spec’ed the SE7600 inverter. When I questioned them about this selection they informed me that they can overdrive the inverter by 150%. Upon checking with SolarEdge, I discovered that this is not entirely accurate. The SE7600 inverter can output 7600 watts. While it can accept an input of up to 150% greater than that at its input, the inverter will never output more than 7600 watts. The “excess” power (the difference between the 11,560 watts input (assuming ideal panel production) minus 7600 watt output of the inverter, or 3,960 watts) will become heat that the inverter has to absorb. SolarEdge said that amount of heat from the inverter will reduce its reliability.
I thus went back to Tesla and they reviewed the design and changed the inverter to the SE1000, and ion a third review, ultimately to the SE11400.
However, Tesla made a second design error. The SE11400 inverter has 3 string inputs. Each string input can accept up to a maximum of 6000 watts at each string input. My design will employ 340 watt panels, which means that each string input on the inverter can have a maximum of 17 panels (340 watts/panel times 17 panels equals 5,780 watts). Tesla’s design drawings showed string input1 having 23 panels, string input2 having 11 panels, and string input3 not being used. String input1 would be taxed and likely fail over time. I thus requested that the design team review the plans once more and limit string input1 to 11 panels and use string input3 for 12 panels. This way, none of string input1 to string input3 will be operating beyond the inverters design limits of 6000 watts per input.
if you are experiencing repeated inverter failures, I would suggest trying to determine whether the inverter is too small for the application or if more panels than permitted are connected to the string input on the inverter. I believe (but you should double check) that the SE7600 inverter has two string inputs, with each string input being limited to 6,000 watts. The smaller inverters are limited to even less than the 6,000 wattage on their string inputs.