Will window tint affect my Tesla's factory warranty?
We cannot give a blanket answer, because it depends on the terms covering your vehicle. Check the warranty documents that came with your Tesla, and ask us to go through your car before you book, so any film choice rests on what those documents actually say.
Will tint interfere with my Tesla's cameras, antennas and GPS?
Tesla's vehicle glass page says its cameras rely on the glass for image quality, and that the glass supports antennas for passive entry, LTE, Wi-Fi and GPS accuracy. The Model Y owner's manual adds that blocked cameras can limit features. Those are reasons to choose film with care and to mention anything mounted on your glass at the quote.
If Tesla offers tint of its own, why choose an independent installer?
Tesla's own offer, where available, and an independent shop are two routes to the same glass, and either can be a sound choice. An independent shop is local, you can visit it and speak to the people who will fit your film, and you see the quote before anything starts. Compare what each option covers before you decide.