Morningstar's Ground Fault Protection device provides a code-compliant solution for adding ground fault protection to off-grid and on-grid PV systems. The GFPD-150V works with all 150V TriStar controllers. For 600V TriStars use the GFPD-600V.

The GFPD detects and interupts ground faults in the PV system. Morningstar's GFPD will detect a current imbalance between conductors in a circuit and will break both positive and negative legs once a ground fault is detected.