I have 2 of them, and both work fine. They give an output controlled from 0 to 20vdc and an output power of 0 up to 30 amps.
I have 0 to 8vdc/75 amp units listed as well, and are in the offer of multiple units. The item "Sorensen DLM 20-30. 0 to 20vdc, 0 to 30 Amp output" is in sale since Saturday, October 12, 2019. This item is in the category "Business & Industrial\Electrical Equipment & Supplies\Power Supplies\Switching Mode Power Supplies". The seller is "vikiticingo" and is located in San Jose, Escazu.
This item can be shipped worldwide.