DEHN Generator Connection Box Type 2 IP65 2 MPPT 1 String per MPPT up to 1100 V DC (900924)

PV string combiner box with integrated Type 2 surge protection, built for 2 MPPTs with one string each, supporting DC voltages up to 1100 V. The DEHN Generator Connection Box 900924 combines two PV strings in a UV-resistant polycarbonate enclosure rated IP65, protecting the inverter from surge damage while simplifying DC cabling.

Advantages

Integrated Type 2 surge protective devices limit transient overvoltages to ≤ 4.0 kV, safeguarding the inverter. The SCI technology allows safe replacement of protection modules without disconnecting the PV array. Wall-mountable and suitable for outdoor installation, the enclosure withstands temperatures from -40 °C to +80 °C.

Suitable for

• Photovoltaic systems with two MPP trackers and one string per tracker
• Inverters with a maximum DC input voltage of 1100 V
• Outdoor installations requiring IP65 protection

Key specifications

• Number of MPPTs: 2
• Strings per MPPT: 1
• Maximum PV voltage: 1100 V DC
• Maximum short-circuit current per string: 20 kA
• Nominal discharge current (8/20 µs): 20 kA
• Maximum discharge current (8/20 µs): 40 kA
• Voltage protection level: ≤ 4.0 kV
• Enclosure material: UV-resistant polycarbonate
• Ingress protection: IP65
• Operating temperature: -40 °C to +80 °C
• Connection terminals: screw terminals up to 16 mm²

Recommendations

Ideal for solar installations where two separate MPPT inputs need surge protection and a tidy, weatherproof DC combiner point.