It's not. Either party can renegotiate a contract or back out of it, pursuant to the terms of that contract. Which is why without being an attorney and seeing t

It's not. Either party can renegotiate a contract or back out of it, pursuant to the terms of that contract. Which is why without being an attorney and seeing the actual text of the contract it's useless to speculate about whether or not Tesla can do this. Some folks might have promissory estoppel damages as was mentioned elsewhere, but that's entirely different than "you signed this contract so you must follow through on it."