The reason why durability is important to me is that I would like to have a system that would last me 20 to 30 years. Hms Photovoltaik can be used with panels that usually last long, yet I am not certain about micro-inverters. The warranty is about 20-25 years and it turns out to be promising by other brands. Have there been micro-inverter early failures? How easy were they to replace? I also wonder whether panel level optimization can be used to minimize strain and it has a positive effect on the general system endurance.