Solar Panel Blocking Diode Installation

In this video you will learn the importance of a bypass diode in solar panel learn how to connect a bypass diode to your own solar cells to improve the eff.

Solar panel blocking diode installation.

Again current flows from high to low voltage so during a sunny day the voltage of a solar panel will be higher than the voltage of a deep cycle battery and the current will naturally flow from the panel to the battery. It is always installed in series with the solar panel. Figure 3 shows the simple working of a bypass diode. It allows the current to flow from the panel to the battery but blocks the flow in opposite direction.

Blocking diodes will be of benefit in any system using solar panels to charge a battery. For solar panels we recommend you put one blocking diode on each solar panel inside an abs project box. Now let s consider what happens if one of the panels in the above diagram is shaded. But at night if the solar panel is connected directly to a battery the voltage of the solar panel is going to be lower than the voltage of.

To prevent this from happening a blocking diode is installed. Blocking diodes are used to prevent your batteries from discharging backwards through your solar panels at night. If you have two 175 watt panels each at 42 volts you will need two 8 amp 45 volt diodes. Not only will that panel not be producing any significant power but it will also have a high resistance blocking the flow of power produced by the unshaded panel.