System solution with disconnect switch for PV inverters with 1 MPP tracker. Varistor surge protector, pluggable with disconnection device in fault-resistant Y-circuit according to VDE 0100-712 (50539-12). Low DC protection level: < 3.0 kV (Uoc max = 900V DC with V25-B+C/0-450PV). Disconnect switch (1000V 32A) for safe disconnection of the DC string line. Each protection device has 1 terminal point pre-installed in the housing for up to 6mm², rated for up to 30A DC per terminal. Pre-assembled in a polycarbonate housing (IP65), UV-resistant for outdoor use, including cable gland set. For DC protection of the inverter in PV systems. Additional measures may be necessary in case of condensation risk due to wind, ice, temperature, or sun.