I have an AIMS PWRIX120012S sine wave inverter that I installed spring 2017 to power my new residential refrigerator. During our last camping trip this fall, the inverter stopped providing 120 volt power. After returning home, I called AIMS technical support and confirmed that at 15 months, my warranty was done. The tech suggested that I open the unit up and check the internal fuses myself as this would no longer invalidate my already expired 12 month warranty. What I found was that the fuses were all good. However, I observed that a "daughter" circuit board mounted perpendicular to the "main" or "mother" board had torched spectacularly leaving a good soot trail. I am now planning on replacing the AIMS with a SAMLEX sine wave inverter this coming spring.