A method of installing solar battery modules wherein a plurality of solar battery modules are disposed and installed on a main roof structure wherein each solar battery module comprises a solar battery constituting a roofing member and a supporting stand provided on the eaves-side end of the back face of this solar battery module and whereby this solar battery is fixed to the main roof structure, a plurality of these being disposed in mutually adjacent fashion on the main roof structure, in which:
- a mounting groove that receives the ridge-side end of a solar battery of a solar battery module that is adjacently disposed on the eaves side is formed in said supporting stand,
- a recessed part that extends along the eaves side from the ridge side is formed in one left or right side end of the solar battery module,
- a projecting part of a shape that will enter said recessed part is formed on the other side end of a solar battery module and
- waterproofing means is provided that, in a condition in which said projecting part is inserted into a corresponding recessed part of an adjacently disposed solar battery module at the side, prevents circulation of rainwater invading to the upper surface of this projecting part to the lower surface;
- comprising;
- a step of providing water flow checking means that prevents invasion of rainwater covering the gap between these supporting stands extending over both supporting stands of solar battery modules that are adjacently disposed on the left and right sides and linking these supporting stands by these water flow checking means;
- a step of mounting gaskets formed in a prescribed length in the interiors of a mounting groove in a supporting stand of an already-installed solar battery module such that the joint portion of adjacent ends of the gaskets that are adjacently disposed in the longitudinal direction is positioned corresponding to the upper face of said projecting part of a solar battery module that is adjacently disposed on the eaves side or of a projecting part that is inserted in said recessed part;
- a step of inserting the ridge-side end of a solar battery of a solar battery module that is adjacently disposed on the eaves side in said gasket;
- and
- a step of mounting said projecting part or recessed part of a solar battery module that is adjacently disposed on the eaves side with a corresponding recessed part or projecting part of a solar battery module that is adjacently disposed at the side thereof.