This inverter worked perfectly for the first 3.5 hours. After turning it off and trying to use it a second time, the orange warning light came on, indicating a problem. I called Go Power tech support and they advised me to try a hard reset by unplugging the power and ground wires for an hour and then plugging them back in. After completing the hard reset I got a blinking orange light and a beep every second and no power. After removing the inverter I noticed something rattling inside, I opened the case and found three pieces of a blown MOSFET. I have contacted Go Power for warranty support and am awaiting a response.