dukeofted

But it shouldn't be that complex in the beginning, make the thing repairable wherever it may end up around the globe. Simples!!!

I'm not defending the decision to ship the motor back to California, just answering the question. It's always helpful to have numbers.

That aspect does seem nuts. Why software cannot be installed at worst case by a cable from a laptop I don’t understand

I have one in my shed and one on my boat, now down to just over £40 so no point in using the cheap rubbish...

I design my own and have them made by a sign company. I generally use ETA or Carling switches and breakers. These are just breakers...

I made my own by sketching out what I needed and then taking it to an custom engraver and getting then to make what I sketched

As Roger has indicated, the DIN rail circuit breakers are a good option. They are very easily replaceable (important if you are using...

Here is another example from a different boat, to give you some installation ideas.