A solar module comprising a sheet; a plurality of solar cells electrically connected in series between first and second conductor lines, and arranged on a first side of the sheet, wherein the first and second conductor lines each extend along a length on the sheet; a first conductor lead in electrical connection with the first conductor line and a second conductor lead in electrical connection with the second conductor line; and a through-hole in the sheet through which the first conductor lead extends to a second side of the sheet and a further through-hole through which the second conductor lead extends to the second side of the sheet.