Saggy sarking allows air to flow through from bottom vent to upper exhaust vent.

Saggy sarking allows air to flow through from bottom vent to upper exhaust vents through gap in sarking overlap

Bottom vent batten used for better air flow. New ventilated metal batten for the whole area are under developement.

Image above shows inside roof view of lower edge ventilation batten, and before cover strips are fittet between tiles.

Image shows (yellow arrow) a ventilated metal batten formed from louvre mesh galvinised steel sheet.

Typical ventilation using two 300 mm throat twirly vents. Alternatively ridge vent designs can be used for air release from the roof space.

The solar facing roof area is measured and the best position for the solar array is determined. The position of the top batten for each row of tiles is marked on each side of the solar area. A string line or a batten spacer template is used to mark the whole row.

Then on each rafter the set out points are marked with the before prepared gauge rod. Set out nails are hammered into these points and the battens are laid down on them. Now the exact lengths and the positions of the battens are marked and the battens are cut.

Consider that the battens should not end all on the same rafter (Australian Standards).

When fixing the battens make sure the distance of the top battens of each solar panel row is exact and they have no curves. That avoids problems afterwards. Caution: For the length of the solar panel only a little angle or curve in the top batten makes a big difference at the end of the solar panels. The accuracy of the battens between is not this important.

Another possibility is just to calculate the length of the battens and fix them on the roof in the right distances, especially for only small arrays.
The only important thing is that the battens of each top row are mounted exactly. The gauge rod and the set out nails make this easier, especially for bigger solar roofs.

The battens are nailed on the rafters, if available with a high pressure nail gun.

Depending on where the vent is to install it should be mounted before the panels.
The wholes for the vent are cut and the vents are installed.

It is quite important to install a vent system to cool the solar panels down and increase the efficiency!

The solar panels are put on the roof starting on one side of the calculated field with the bottom row.
Important for installing:
1.) The solar panel should lie properly on the top batten.

2.) The plug connection of the wires on the back of the panels must fit completely.

3.) After that the batten spacer are positioned right to cover the batten.

4.) The distance of the panels are right when the distance parts just touch.

It is useful to fix the soaker flashings on the second side not before the cover strips are installed. The panels can move from their first position and the flashings might have to be removed.

5.)The panels of the rows above have to be in the same plumbline

One of the side soaker flashings can already be installed.

Caution: Do not go on the solar roof without safety harness / positioning system.

After all solar panels are put on the roof properly the cover strips are mounted.
Best to start in the first row where also with the panels started.

Case: If the roofer have not mounted their battens by this time the first up row cover strips on each side must not be installed. After everything else is installed the first right and left row panels must be put beside for the roofer to be able to reach the first rafter.

The cover stripes are clipped over the gaps between the panels and pushed up as far as possible and fixed each with two screws, one in the bottom batten and one in the second top batten.

The roofer is installing his battens and needs to fix them at the first rafter under the solar field.

Now the left and the right soaker flashings are installed beginning with the bottom one in a distance of 15mm to the solar panel. The top one on each side is, as mentioned before, longer to fit under the top flashing.
Like shown in the 'installation detail' the top flashing has to be installed. Where the different parts of the top flashing overlap it is useful to put a string of silicone in. Silicone is also put on every whole that is made by mistake.

At last the cover flashings on each side are installed started again with the bottom one. The ends of these flashings are cut and bend as shown in the drawing.

After the roofer have done their work the rooftop solar power generator can be seen in it's whole beauty.