Works. At 5A it got hot so it's agood idea to add a heatink to the XL4015 and the diode, a fan would also be a good idea. Current setting maximum can be over or under 5A, that's because of the tolerances of the resistors. One of the two converters was slightly under 5A (4,8A) at the maximum setting, the other one was over 5A. Also the LEDs showing CC/CV work fine. Short circuit protection is working fine (of cause it's used to set the maximum current). I can recommend the module even if I haven't checked the efficiancy yet. Shipping took 11 working days. Thank you!
OK components and seller with very good organization,