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Charge Controllers - Accessories
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Accessories for Morningstar Solar Controllers

GFPD-150V and GFPD-600V
Ground Fault Protection Device

The Ground Fault Protection Device (GFPD) products are off-grid and on-grid PV safety devices. The GFPD is available in two models, GFPD-150V and GFPD-600V, to support 150V and 600V PV system breaker stacks, respectively. Morningstar’s GFPD increases safety and design flexibility in off-grid and on-grid PV systems. Ground fault protection is used in electrical systems to prevent current from following any unintended paths during a ground fault. It is critical to detect any stray current and to interrupt (break) the circuit until safe operation can be restored. A current imbalance between the conductors of a circuit indicates a ground fault. Morningstar’s GFPD will detect this condition and break the circuit on both the positive and negative legs. Disconnecting both poles ensures interruption of the ground fault current.

Morningstar’s GFPD Solution:

  • Maintains the integrity of earth bond for battery and loads

  • Trips at lower fault current with greater accuracy

  • Breaks both conductors in the faulted circuit and completely isolates PV source circuits

  • Does not require an extra warning label at the battery bank as per U.S. National Electric Code requirements

  • Provides design flexibility to meet a wide range of configurations:

          Positive and negative ground
Large and small arrays

  • Makes it easier to locate and troubleshoot ground faults

  • Powered via the PV system’s battery bank

  • Equipped with both visual and audible alarms

  • Built to support both single controller and multiple controllers systems:

          Morningstar’s GFPD will only shut off affected controllers, while maintaining
              the system earth bond.
All loads will continue to operate safely with the battery remaining bonded
              to ground.
Multiple controllers and GFPDs can be added on an as-needed basis


Manual GFPD-150V

Manual GFPD-600V

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