Plenty of models
C13 is the smallest model, height 1,3 m.
C16; heat collector, 6 masts, 12 mirrors, power 8 kW.
C46 to an apartment house, power 34 kW.
Solar power plants with Solixi C49 and C96 models.
by concentrating the sun beams.
The direction of the roof and the shadows do not matter
because Solixi collector is towards south and above the shadows
and the mirrors concentrate the radiation from morning until evening.