Solar modules with bypass diodes are manufactured because of two reasons.
Solar panel bypass diode diagram.
Recently some solar panels are being manufactured by the cells divided into groups with a built in bypass diode in that group.
Bypass diodes are used to reduce the power loss solar panels experience due to shading.
Bypass diode and blocking diode working used for solar panel protection in shaded condition.
By pass diodes will not be of use unless panels are connected in series to produce a higher voltage.
This is where by pass diodes come into play as shown in the diagram to the right.
Because current flows from high to low voltage when a solar panel has cells that are partially shaded the current is then forced through the low voltage shaded cells.
If your solar panel will not exceed 2 1 2 amps of current then the 3 amp version is fine.
In different types of solar panels designs both the bypass and blocking diodes are included by the manufactures for protection reliable and smooth operation.
For solar panels the 3 amp and 8 amp diodes can be used for this purpose.
In simplest terms a diode can be understood as a two terminal electronic device which allows electrical current to pass in one direction.
An 8 amp diode is acceptable for panels up to about 7 1 2 amps.
Solar panels with more charge current than this would require a larger diode such as our 85 amp diode.
Learn how and why blocking diodes and bypass diodes are used.
We will discus both blocking and bypass diodes in solar panels with working and circuit diagrams in details below.
Diode and unidirectional flow of current.
A blocking diode and bypass diode are commonly used in solar energy systems and solar panels.