For the young Tesla drivers out there, I would recommend starting with a quote from Allied. Every other insurance company out there seems to charge an arm and a leg if you're a young Tesla driver, regardless of how clean your driving record is. Allied seems to put less weight on age, and more so on driving record. Age, it seems, is a significantly larger risk factor for other insurance companies in determining an annual premium.
Case in point: Ameriprise wanted $3500/yr from me. AAA wanted $4900/yr. Liberty Mutual wanted over $5k/yr. Other quotes I received from Progressive, Esurance, etc. were all in the $2400+ range.
Allied only wanted $1700/yr from me when I was shopping for rates last year, pretty much half the price of other insurance companies, so I went with them.
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On a related note: 28 seems to be a magic number for Wawanesa. Last year when I was 27 they wanted $2400/yr to insure my 70D. I opted to go with Allied at $1700/yr at the time.
Allied bumped up my rate to $1800/yr for renewal this year, so I decided to shop around again. Wawanesa now quoted me $1600/yr. Clean driving record, and licensed for 10 years in the US, so I'm making an educated guess that at age 28 is when Wawanesa decides to lower rates.