The main information for the selection of photovoltaic junction box should be the current size of the module. One is the maximum current of work and the other is the short-circuit current. Of course,solar junction box the maximum current that the module can output during the short-circuit current. The rated current of the junction box should be calculated according to the short-circuit current. If the safety factor is relatively large,solar junction box if the junction box is calculated according to the maximum working current, the safety factor is smaller.
The most scientific selection basis should be based on the current and voltage of the battery that should be taken out with the light intensity. It is necessary to understand the area where the module you produce is used and how big the light is in this area,solar junction box and then compare the battery The curve of the current of the chip with the intensity of the light, it should be more scientific to investigate the possible maximum current and then select the rated current of the junction box.
According to the power of the photovoltaic module, 150w, 180w, 230w, 310w? Other specifications of the components, diode parameters, 10amp, 12amp, 15amp or 25amp? The most important point,solar junction box what is the short-circuit current? For this test, the selection of the diode depends on the following quantities: current (larger is better),solar junction box maximum junction temperature (Bigger is better), thermal resistance (smaller is better), voltage drop (smaller is better),solar junction box reverse breakdown voltage (generally 40V is enough)