Solar Connection Box
The solar box allows easy interconnection of up to 4 solar panels or solar strings.
Multiple Junction Boxes can be connected in series to the maximum current and thus enable a tidy installation. A direct line with + Solar, -Solar and ground leads now to the island inverter or to the network power inverter. The solar box is equipped with WAGO terminals for connection. In addition High Voltage Junction diodes per string and a varistor is fitted against indirect lightning strikes.
Specifications
Description | SB1 | SB2 |
|---|---|---|
Maximum system voltage: | 48V | 1000V |
Maximum current through solarbox: | 50A | 50A |
Strings per Solarbox: | 4 | 4 |
Varistors + / Earth and -/ Earth: | 45VDC each | 670VDC each |
Diode per conductor: | 1000V/10A | 1000V/10A |
Cable cross-section solar / String: | 4mm2 | 4mm2 |
Inverter riser: | 16mm2 | 16mm2 |
Definition Solar Strings:
12V= 1 Panel (Open-circuit voltage ca. 22V)
24V= 2 Panel in Serie (Open-circuit voltage ca. 44V) 48V= 4 Panel in Serie (Open-circuit voltage ca. 88V)
Limit determination:
At the maximum system voltage of the possible open circuit voltage of the solar panels in series circuit (string interconnection) must be considered.
In the series connection of solar pit the sum of the panel or string currents must not exceed (ISC / short circuit) 50A.
