I'm not sure if Paul has kitted this DC Controller as yet. I think there are 4 or 5 of them out in the wild, a couple on cars and some still testing/building.
This is the same layout as the 3 phase AC controller - 3 of the 600V IGBTs, separate current sensing, big ring capacitor.
I did a video to ... hopefully ... assist in getting the controller up and running. It's OK as far as it goes. I need to add some pictures of the hardware connected, with enough detail.
* AND * I need to wire things together instead of using alligator clips!