I already have an auxiliary panel (installed be a licensed electrician) and sufficient service to the main panel. Knowing this, the "Tesla approved" installer told me he couldn't use the existing sub panel, and quoted me over $2,000 PLUS the installation of a second sub panel next to the main panel ($3000+) for a 50 amp circuit and a 14-50 plug. I got quotes from 2 other electricians before selecting one (licensed) that charged me $900. He was the one that pointed out that I didn't need a 50 amp circuit because my Mobile Charger only supported 32 amps. He installed a 50 amp anyway, and suggested an option for a shorter cable run that cut 60 feet off my run (still using the $0.18 per foot guideline). He also told me to look into rebates from my provider that no one else mentioned, and that resulted in a $500 rebate, making the entire installation cost $400 instead of more than $5,000. My charger works great, never heats up, and I've had no issues at all. My biggest adjustment has been learning to park on the other side of my garage, although my wife loves that change. My point is ... get more than one estimate! Not all electricians (or anyone else) have the same level integrity.