Solar module holding device for an installation of bifacial solar modules (12a; 12b; 12c), with at least one carrier unit (18a; 18b; 18c), the carrier unit (18a; 18b; 18c) comprising at least one carrier shaft (20a; 20b; 20c) carrying at least one bifacial solar module (12a; 12b; 12c) that is arranged on an imaginary mounting plane (16a; 16b; 16c), wherein the carrier shaft (20a; 20b; 20c) is arranged at least substantially parallel to the mounting plane (16a; 16b; 16c), and with at least one reflection unit (24a; 24b; 24c) for reflecting incident light onto a side, facing towards the carrier shaft (20a; 20b; 20c), of a bifacial solar module (12a; 12b; 12c) that is supported on the imaginary mounting plane (16a; 16b; 16c) by the carrier shaft (20a; 20b; 20c), the reflection unit (24a; 24b; 24c) comprising at least one cover element (44a; 44b; 44c) which has at least one reflection surface (46a; 46b; 46c) and is realized separately from the carrier shaft (20a; 20b; 20c), wherein the cover element (44a; 44b; 44c) is fastened in a proximity of the carrier shaft (20a; 20b; 20c), wherein in at least one mounted state of the cover element (44a; 44b; 44c) the cover element (44a; 44b; 44c) covers at least an outer surface (48a; 48b; 48c) of the carrier shaft (20a; 20b; 20c), characterized in that the cover element (44a; 44b; 44c) delimits in the mounted state at least one passage (50a; 50b; 50c) together with the carrier shaft (20a; 20b; 20c), wherein the cover element (44a; 44b; 44c) at least partially accommodates via the passage (50a; 50b; 50c) cables (58a; 58b; 58c) which extend on the carrier shaft (20a; 20b; 20c) and which are in particular configured for a connection of at least one bifacial solar module (12a; 12b; 12c). with at least one carrier unit (18a; 18b; 18c), the carrier unit (18a; 18b; 18c) comprising at least one carrier shaft (20a; 20b; 20c) carrying at least one bifacial solar module (12a; 12b; 12c) that is arranged on an imaginary mounting plane (16a; 16b; 16c), wherein the carrier shaft (20a; 20b; 20c) is arranged at least substantially parallel to the mounting plane (16a; 16b; 16c), and with at least one reflection unit (24a; 24b; 24c) for reflecting incident light onto a side, facing towards the carrier shaft (20a; 20b; 20c), of a bifacial solar module (12a; 12b; 12c) that is supported on the imaginary mounting plane (16a; 16b; 16c) by the carrier shaft (20a; 20b; 20c), the reflection unit (24a; 24b; 24c) comprising at least one cover element (44a; 44b; 44c) which has at least one reflection surface (46a; 46b; 46c) and is realized separately from the carrier shaft (20a; 20b; 20c), wherein the cover element (44a; 44b; 44c) is fastened in a proximity of the carrier shaft (20a; 20b; 20c), wherein in at least one mounted state of the cover element (44a; 44b; 44c) the cover element (44a; 44b; 44c) covers at least an outer surface (48a; 48b; 48c) of the carrier shaft (20a; 20b; 20c), characterized in that the cover element (44a; 44b; 44c) delimits in the mounted state at least one passage (50a; 50b; 50c) together with the carrier shaft (20a; 20b; 20c), wherein the cover element (44a; 44b; 44c) at least partially accommodates via the passage (50a; 50b; 50c) cables (58a; 58b; 58c) which extend on the carrier shaft (20a; 20b; 20c) and which are in particular configured for a connection of at least one bifacial solar module (12a; 12b; 12c).