The Xantrex XW-MPPT60-150 charge controller comes with internal GFCI protection. Does this mean I don't need a separate GFCI for these units? I am planning a system with two charge controllers and an e-panel from Midnite Solar, and am wondering if I need a second (external) GFCI for each unit. My guess is that the integral GFCI are for internal protection of the controller only. Thanks for the help.
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