After 6 years the Solar Edge SE7300 has lost DC connection and has failed to operate. I am very supprised to see this falure since the unit has been installed inside the house with exetrnal fans cooling it down from 30C so I belive its been well looked after however lasting only 6 years is disssapointing and the replacement will be a an HD 8250 unit which is smaller in physical size and no display. Service from SE has been fantastic and I hope the replacent stays on for minimum 10 years.