Small Scale Offgrid Solar PV: Installation Manual
Fixing the upper part of the panel to the roof is more complicated. There will not be a beam
directly beneath it to fasten to.
4. The installer in the attic positions a wooden board directly below the upper edge of the
panel. The board should be the width of the panel + 60 cm, with an equal overhang on
each side. This person has to push the board up against the inside of the roof, while the
installer on the roof screws through with 3½ " roof screws to hold it in place.
Support board on the inside of the roof for fixing the upper part of the solar panel.
5. The upper aluminium angle can now be screwed to this board (see step 3). It‟s easier to
achieve a good fixing if the person on the inside carries on pushing upwards. If the roof
screws are not long enough use 4” nails.
3.1 Fixing the Panel to a flat roof
On a Central American flat roof you can use the building‟s structural steel (rebar) as a base for
installing the Panel. In this example, wooden boards are used as the panel supports rather than
aluminium angle.
Rebar
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