October 21, 2013 Fourth-Generation Enphase System Now Shipping in North America PETALUMA, Calif.--(BUSINESS WIRE)--      Enphase      Energy, Inc. (NASDAQ:ENPH), announced today the fourth-generation Enphase      System is shipping throughout North America. The system features the M250      Microinverter, which offers higher output power, increased      conversion efficiency and a labor-saving integrated ground feature, in      addition to new enhancements to [...]