After discussions with the supplier/installer of the panels and also with the Dutch community for house owners (VEH), which has set up the activity, we have made a master plan for placing the panels. The installer can have an other opinion, as he does not work with the measurements, but with satellite images of the house.
However we plan the following:
On the flat part of the roof, over the nett width of the house (5.60m – 19ft) five vertical panels of each 1.0m width and 1.65m highth (3.3ft x 5.5ft).
Solar surface flat roof: 5.0m x 1.65m = 8.25 sqm (88.8 sqft)
The top roof construction on the right side is not very effective. On the left side of the window we have a usable top roof surface of 1.20m (4ft) width and 3.90m (13ft) highth. That implies two vertical panels, in total 1m width and 3.3m highth (3.3 ft x 11ft). Above the window there might be space for a horizontal panel, or the alternative one vertical panel on the right side of the window.
Solar surface top roof: 3.0m x 1.65m = 4.95 sqm (53.3 sqft)