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My understanding is that NACS is open: https://www.tesla.com/blog/opening-north-american-charging-standard https://www.tesla.com/blog/opening-north-american-cha

• simondotau 3y ago
  It's open in every respect that matters, but pedants will rightly point out that it hasn't been submitted to a classic standards body (like SAE) to formalise in the way that satisfies middle management and expensive consultants.