An important issue in the PV sector is Potential Induced Degradation or PID, the deterioration of solar panels due to the high voltages that occur during the day and cause leakage currents to the earth. This phenomenon has been known for some time and is the reason why manufacturers guarantee a declining return as the installation ages.
This article shows an overview of possible PID solutions.
PIDbox Mini = to cure and to prevent from PID
Patented solution in series
Easy installation procedure
Operates independently of the inverter
No manufacturer approval is needed concerning
Compatible with SolarEdge technology
Very suitable for battery storage systems
Very high increase of solar panel yield
More information on 100% recovery: Eliosys test and TUV Rheiland recovery test
PIDbox Mini = to prevent from PID
Solution in parallel (similar technology as SMA Offset Box)
Very easy installation procedure
Does NOT operate independently of the inverter
Approval of manufacturer is needed concerning inverter warranty
Approval of manufacturer is needed concerning inverter warranty
Never full recovery off your panels
Grouding
Inverter before 2008: grounding is possible. Replacing all panels with PID is necessary, because there is no recovering from panels by a PIDbox. Still problems at large PV plants because of the grounding difficulties.
Inverter after 2008: inverters provide a higher efficiency, but no longer have a transformer. So grounding on the negative site of the inverter is impossible.
Even if solar modules need grounding (e.g. Sunpower), an inverter with transfomer can be replaced by a tranformerless inverter with a PIDbox included.
