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Supercharger Problem/Question

Supercharger Problem/Question

I recently started taking longer trips with my Model S. On my first trip out I set my charge limit to 300 miles but didn't have time to get all of that loaded up before I had to depart. No problem though because the supercharger was on the way. I noticed that when I plugged in, the supercharger ramped up to and was delivering 300 amp - but within 10-15 minutes was consistently dropping power until it was down to 70 amp. Is this normal? This happened on three different occasions using two different supercharging stations and using different plug stations at those stations...

I want to ensure that the next time I go to a supercharger for a long trip it will actually charge to a full 300 miles in the 30 minutes it indicates on the dash. I fear that if the amperage continues to drop as it did the complete charge may never happen.

Thanks for any insights.

George in Arlington, VA

LMB | 13 March 2014

(LMB spouse)

Short answer: it's normal for the superchargers to ramp the current down as the battery charge increases. The charge will complete, but the last few percent take much longer than the rest. This is a Model S question, so it's better to post it in the Model S forum.

gtj | 13 March 2014

Thanks - I wish there was a way to just cross-post, but I will put it in the Model S list as well. I would presume that all Tesla battery charging systems would be similar so I put it in this forum...

LMB | 13 March 2014

(LMB spouse)

The Model S is the only current Tesla vehicle that can use the supercharger. The Roadster cannot, but Tesla state that all future Tesla cars will.