DIN rails have been moved to better accommodate the new setup. Previously, there was lots of space at the bottom for the battery, but it has now been moved into a dedicated cabinet. There are lots of terminal blocks at the top for incoming cables.

I made a simple DIN-mountable PCB holder out of a 3.2 mm sheet of polystyrene for the #Arduino and I/O boards. I’m reusing the old board for testing.