Down 55% on the Year, Is Enphase a Buy?

The long-term returns suggest Enphase is a quality company riding the wave of solar deployment worldwide, which means this recent sell-off could be a terrific buying opportunity. First, and perhaps most importantly, in a sector marked by commoditization and competition, Enphase's high-quality microinverters appear to be differentiated from the competition. Most inverter systems are "string" inverters, which convert power from an entire array of panels.