B-Class Electric Drive Forum

15 amps or 20 amps
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Author:  Vic [ Mon Nov 19, 2018 12:45 am ]
Post subject:  15 amps or 20 amps

Brand new EV owner. I just bought a 2015 B250. All I have is the slow charger that came with it. I may not need more than that, given it will be a true commuter car. I have a 15 amp 110 charger plug very close to my car there's another 110 outlet that's 20 amp, it's not as convenient. Would the 20 amp charge the car substantially faster? I also noticed on eBay for about $200 I can buy a cord that fits my clothes dryer its 220 and not far from where I park. How much faster will that 220 charge than the 15 amps or 20 amps 110? Thanks for your help for the Newbie.

Author:  JeffRay [ Mon Nov 19, 2018 5:25 pm ]
Post subject:  Re: 15 amps or 20 amps


Welcome. In general, as my last physics course was back in the day, a 220v charges up to 5x faster. If you are saying you will be charging overnight, you are right that a solid 10 hour charge will restore around 40% of the battery. If you are in warm climate area, 40% will get you over 40 mile roundtrip. So you can top up every night with your existing convenient outlet. I can't comment on 15 v 20 amp but you can search this forum for topics on charging.

It is generally not advised to use a long cord to charge using 220v given a concern about overheating the cord or outlet. I figure one hour gets me 25% of my charge back, so only four hours to get 100% back.

Hope this helps directionally if not specifically.

Enjoy the ride Vic.

Author:  GlennD [ Mon Nov 19, 2018 10:45 pm ]
Post subject:  Re: 15 amps or 20 amps

At work I charged for free. In my case a 208VAC EVSE worked for me. Now as a retired person I charge at 240VAC at 40A. As much as I drive I could get away with 120VAC trickle charging, I charge at 75% of the 80% default. The EVSE was upgraded to 40A but just because,my 30A EVSE was fine. The Quick Charge Power cable replaced the cable on a EVSE I sold so the charge was minimal. I really have the time to trickle charge

I really like the size of the Quick Charge cable. I purchased a 40A cable from TucsonEV and the cable was huge. Both worked for a fixed installation.

Author:  Vic [ Tue Nov 20, 2018 8:07 pm ]
Post subject:  Re: 15 amps or 20 amps

Good info, thank you. Vic

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