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Warren Buffett (left) and Charlie Munger.
  • Charlie Munger weighed in on Elon Musk, and called BYD one of his best-ever investments.
  • Warren Buffett's right-hand man called the Tesla CEO a "genius" in some ways, but a strange man.
  • Munger said BYD is miles ahead of Tesla in China and raking in massive profits there.

Warren Buffett's right-hand man has described Elon Musk as a gifted but weird individual, and touted Chinese carmaker BYD as a serious threat to Tesla and one of the best investments of his career.