Solar battery module and tandem solar battery

A tandem solar battery comprising:

• a pair of solar battery modules each of which has
• at least one solar battery panel in which a solar battery cell is formed,
• a flexible substrate which is directly or indirectly connected to the at least one solar battery panel, on which a bypass diode is mounted, and which forms a bypass line of the at least one solar battery panel, and
• a package which accommodates the at least one solar battery panel,
• wherein the flexible substrate includes
• a base material, and
• a wiring which is supported by the base material,
• wherein the wiring includes
• a flying lead which protrudes from the base material and is connected to the at least one solar battery panel, and
• a terminal which is provided on an outward side of the package,
• wherein the pair of solar battery modules include a first solar battery module and a second solar battery module,
• wherein the at least one solar battery panel of the first solar battery module includes a bottom solar battery panel,
• wherein the at least one solar battery panel of the second solar battery module includes a top solar battery panel which is laminated at a position facing a light receiving surface of the bottom solar battery panel, and
• wherein the top solar battery panel is larger than the bottom solar battery panel and overlaps the bottom solar battery panel in its entirety in a plan view.