Do you have pictures of pvc weather head installation in solar farms? What´s the recommended height of the weather head (pvc conduit)?
Are you talking about using weather heads for DC conductors going from the array down into the ground? We do that frequently, but alas I do not have any pictures. Pretty much the top of the weather head would be about 4 inches under the module and then the conductors would swag over to the array purlin. The specifics were all pretty much up to the solar integrator we were working for and how they wanted it to look.
Make sure to specify this product, or something similar, to cover the sharp edges of the purlins, in the region where wire will pass over the lip.
https://www.mcmaster.com/#24175k12/=16u637a