Never. My sister-in-law had the same Model S for like 11 years. There was no need. The whole thing about expensive battery replacements every 3 years is most

Never. My sister-in-law had the same Model S for like 11 years. There was no need. The whole thing about expensive battery replacements every 3 years is mostly propaganda from entrenched interests. There are legitimate isolated horror stories, but battery replacements don't generally need to be a thing. Do your own research, but that's my experience. I know a fair number of EV owners.