Help me find the right components for new build


I’m completely new to this and in the process of building my own campervan when I found this project.

I don’t really understand what components I need and hope someone can help.

What I want to do is:

  • See battery level
  • Monitor water level
  • Monitor temperature
  • Control/dimming lights
  • Use display
  • Control heaters

I would also like to know what heaters are supported when it comes to Chinese heaters.

Thanks in advance!