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Losing range after DC fast charging.

Posted: Tue Sep 29, 2020 2:23 am
by ejcabotaje9
So I've noticed whenever I use DC fast charging my miles go down fast quickly compared to when I charge from a level 1 or 2. For example I use fast charge and get 75 miles. Not even driving 2 miles I've already lost about 10 miles. After about 20 miles of drainage it stabilizes. I don't have any codes popping up or anything. It only does it after fast charging. PS I didn't use ac and not driving fast or going uphill. After about 2 miles of going 18 mph around the neighbor it drains quickly up to a certain point (about 20 miles being lost) and haven't even driven more than 10 miles. Anybody else have issues after fast charging?

Re: Losing range after DC fast charging.

Posted: Tue Sep 29, 2020 12:25 pm
by Kermit
It may be because the cooling system is working to get the battery pack temperature and charging components back down to an optimal level.

Re: Losing range after DC fast charging.

Posted: Thu Oct 01, 2020 12:43 pm
by TheLondonBroiler
Kermit wrote:
Tue Sep 29, 2020 12:25 pm
It may be because the cooling system is working to get the battery pack temperature and charging components back down to an optimal level.
Bingo! I had a little 1500+ mile weeklong adventure last month involving 30 some fast charges (12 in one day), and the scenario described is exactly what I encountered, especially when thermal management has to operate, which is anytime you dcfc and the battery temp gets over ~85°F (if you start a fast charge session with full charge speed, 130+ amps, meaning the battery is already 75°F, you very well may get warm enough to trigger/start the cooling system).

If the battery thermal management stops operating and you continue to drive, the GOM should reflect a more accurate range.