This is most basic stand without holes for solar panel controller optionally can be drilled trough base to be mounted on ceiling.
This is based on 14cm wide and 8cm high chinese controller. Personally i printed it on 15% lighting you can print it with any kind of infil as long as its not too soft because its meant to be drilled trough anyway. (Doesnt have holes so it requires drilling trough with sharp screw or drill bit)