How do I power several Unos to several LED pixel strings from a generator?

Other Hardware LEDs and Multiplexing
1

I have an art car project involving a lot of LED strings so I need a lot of power! But I'm so baffled on how to wire the power.

Here's what I have:

  • A generator (Honda EU2000, AC output: 120V, 1600W rated, 13.3A & DC output: 12V, 96W, 8A)

  • 4 Arduino Unos controlling several strings of addressable LED pixels. They're all 5v and 50 LEDs a string. One string draws a max of 2.4A, 12w. Total of 20 strings would draw (max) 48A, 240W.

  • Not sure if it matters but some of the strings will have a 1 meter extension between them.

Here's where I'm confused:

  1. If I need this much power, seems like this generator doesn't have the amperage....right?
  2. How do I power the Unos separately?
  3. How do I power the pixel strings? Lots of 5v, 10A power switching power supplies like this one? Or a 5v power supply like this one?

I have a sketch of how I picture this being wired. Does this make sense?

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  1. If I need this much power, seems like this generator doesn't have the amperage....right?

Rightish.
If you use a switching step down regulator you can double that current because you are halving the voltage. ( rough calculation).

  1. How do I power the Unos separately?

Why do you want to? Their is no point in doing this.

  1. How do I power the pixel strings?

Those are mains input power supplies, where is the mains coming from?