Solar cell element and solar cell module

A solar cell module comprising:

• solar cell elements each including a semiconductor substrate, a surface electrode formed on a light-receiving surface of the semiconductor substrate and a back surface electrode formed on a non-light receiving surface of the semiconductor substrate;
• and
• connection tabs for interconnecting the surface electrode on the light-receiving surface and the back surface electrode on the non-light receiving surface of the solar cell elements,
• wherein a first solder layer for connecting the surface electrode to the connection tab on the light-receiving surface and a second solder layer for connecting the back surface electrode to the connection tab on the non-light receiving surface have different melting points.

A solar cell module comprising:

• solar cell elements each including a semiconductor substrate, a surface electrode formed on a light-receiving surface of the semiconductor substrate and a back surface electrode formed on a non-light receiving surface of the semiconductor substrate;
• and
• connection tabs for interconnecting the surface electrodes on the light-receiving surface and the back surface electrodes on the non-light receiving surface of the solar cell elements,
• wherein the surface electrodes and the back surface electrodes are each connected to the connection tabs by means of a solder, and the connection tabs are provided with through holes at connection areas between the connection tabs and the surface electrodes or the back surface electrodes.

A solar cell module comprising:

• a plurality of solar cell elements;
• connection tabs for interconnecting surface electrodes on a light-receiving surface and back surface electrodes on a non-light receiving surface of the solar cell elements;
• and
• a common connection line to which the connection tabs are connected by means of a solder,
• wherein the connection tabs are provided with through holes at connection areas between the connection tabs and the common connection line.

A solar cell module comprising:

• a plurality of solar cell elements;
• connection tabs for interconnecting surface electrodes on a light-receiving surface and back surface electrodes on a non-light receiving surface of the solar cell elements;
• and
• a common connection line to which the connection tabs are connected by means of a solder,
• wherein the common connection line is provided with through holes at connection areas between the common connection line and the connection tabs.

A solar cell module comprising;

• solar cell elements;
• output wires connected to the solar cell elements;
• and
• a terminal box including terminals to which the output wires are connected,
• wherein the output wires are provided with through holes at connection areas between the output wires and the terminals.

A solar cell module comprising;

• solar cell elements;
• output wires connected to the solar cell elements;
• and
• a terminal box including terminals to which the output wires are connected,
• wherein the terminals are provided with through holes at connection areas between the terminals and the output wires.