I had my solar system installed in 2023, due to component shortage it was delayed slightly, but they still managed to meet the end deadline. In 2024, I detected a failure within a component system. It was narrowed down to a panel or an inverter. Watts up Solar started looking into the issue the same day I brought it to their attention. It took less than 1 week to narrow down the component (panel or inverter. It turned out to be the inverter), file a warranty claim, replace the component, to bring my system back to full working out. This made me feel like I made the right choice with my system installer, Watts Up, knowing warranty would be honored. The Enphase system monitor is super accurate, comparing it to NS powers meter reading, they differ less than 100 kw per year.