I needed an enclosure for a 55 x 25 x 16mm XL4015 buck converter module which I got from BerryBase.

I recommend printing this in PETG since the module may warm up. No supports needed*.

Use four M3x25mm screws and regular nuts for assembly. As shown in the third image cable ties and heat shrinks are also used for cable relief.

* If you print the main shell upside down supporting the holes is required.