To choose the best technology for surge protective devices, we should consider the following technical parameters (include but not limited to):
1. Type of surge protective devices according to EN61643-11/IEC 61643-11
2. Nominal Voltage (Un)
3. Maximum Continuous Operating Voltage (Uc) /Maximum Continuous Operating Voltage for PV System (Ucpv)
4. Voltage Protection Level (Up)
5. Nominal Discharge Current (In)
6. Maximum Discharge Current (Imax)
