The Potential Induced Degradation (PID) effect on PV modules is generating substantial power losses on multimillion dollar projects. This effect is caused by a relative negative voltage between the cell and the chassis and is pushing the main European EPCs to change the layout of their new plants from floating array configurations to negative grounded array configurations compromising in some cases the safety of their PV facilities.
Power Electronics has released the FREESUN PV ARRAY TRANSFER KIT, a cost-competitive solution that enables a safe operation and maintenance of the negative grounded PV plants, and ensures full compliance of NEC2014 690.5(A)(1) and 690.35(C)(1) for checking PV isolation before startup. By mounting this kit, the inverter and the PV plant will be able to shift its running conditions from negative grounded array to floating array and viceversa. Under regular conditions the inverter will be running with a negative pole grounded and therefore, a GDFI will be protecting from the unlikely ground fault defects and the solar cells will not suffer at any time a negative voltage relative to their surroundings. This running mode can be transfered manually or automatically without stopping the inverter to a floating array configuration enabling an isolation monitoring device that O&M can use for: regular PV plant isolation control, identification of the array affected by a ground fault defect, and what is more important increase the operator safety under O&M service activities.
Don’t miss the opportunity to mount this kit on your new projects by contacting your sales representative, the PID noise reduction solution.