The electrical performance of the photovoltaic junction box mainly includes working voltage, working current,solar junction box resistance and other parameters. To measure whether a junction box is qualified,solar junction box electrical performance is a crucial link. When the reverse voltage applied to both ends of the diode reaches a certain value,solar junction box the tube will break down and lose its unidirectional conductivity. In order to ensure the safety of use, the maximum reverse working voltage value is specified,solar junction box which is the maximum voltage that the corresponding components of the photovoltaic junction box can withstand when operating under normal working conditions. Currently,solar junction box the working voltage of the junction box is 1000V (DC).
The selection of the bypass diode mainly follows the following principles: the withstand voltage capacity is twice the maximum reverse working voltage;solar junction box the current capacity is twice the maximum reverse working current; the junction temperature should be higher than the actual junction temperature;solar junction box the thermal resistance is small; Small pressure drop;