Photovoltaic module

A photovoltaic module, comprising:

• a plurality of solar cells each comprising a semiconductor substrate and a passivation layer, wherein each semiconductor substrate is provided with an electrode comprising busbars, fingers, and electrode pads, each of the plurality of solar cells comprises 9 to 20 busbars, each of the plurality of solar cells comprises 40 to 100 fingers, and each of the busbars is connected to 3 to 10 electrode pads;
• and
• a plurality of solder strips extending along a first direction and configured to connect the plurality of solar cells to each other, wherein each of the plurality of solder strips fits the busbars and comprises at least one boss portion each soldered with a respective one of the electrode pads, and a gradient of an outer surface of each boss portion along the first direction ranges from 0° to 10°,
• wherein a gradient of the outer surface of each boss portion along a second direction perpendicular to the first direction ranges from 10° to 70°, and
• wherein the outer surface of each boss portion along the first direction comprises a first slope portion, the first slope portion comprises a top region, a middle region, and a bottom region, and a gradient of the middle region is greater than that of the top region and the bottom region.