TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Over-current with ChargePoint NEMA 5-20

Discussion in 'Model S: Battery & Charging' started by mattmass, May 27, 2015.

  1. mattmass

    mattmass Member

    Joined:
    Sep 1, 2014
    Messages:
    119
    Location:
    Boston, MA
    My apartment has a ChargePoint station with two connectors. One is a J1772, which charges at 208/30A very reliably. The other is a NEMA 5-15/20. I've had no trouble charging using the 5-15 adapter. If I try the 5-20, the station will trip an over-current fault after about 5-10 minutes. 12A charging is pretty painful, so I really want the 16A if I can get it. I've not tried messing with limiting charge current to find a sustainable current above 12A but below 16A.

    I've contacted ChargePoint and they claimed they do see "GFCI trips" on their end. I found that explanation unsatisfactory, considering the station itself is reporting detection of an over-current condition. Could just be the support person has limited visibility into the faults themselves, though.

    Has anyone else had similar issues with this type of station?
     
  2. cantdecide

    cantdecide Member

    Joined:
    Dec 21, 2012
    Messages:
    271
    Location:
    Portola Valley, ca
    I think I had the same problem with a ChargePoint using the 5-20 in Palo Alto... But I rarely use that ChargePoint so I didn't follow up.
     
  3. DavidB

    DavidB Aug 2013 S85

    Joined:
    Jul 8, 2013
    Messages:
    279
    Location:
    Maryland, USA
    Try setting the charge to 14 Amps. Not as fast as 16 Amps, but still better than the 12 Amps.
     
  4. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

    Joined:
    Jun 21, 2012
    Messages:
    7,019
    I'm guessing their software looks for > 15A on the 20A to shut down. I would try 15A and see if it holds steady there.
     
  5. mattmass

    mattmass Member

    Joined:
    Sep 1, 2014
    Messages:
    119
    Location:
    Boston, MA
    Following up on a fairly old thread here, but yes! 15A does indeed work just fine. Thank you!
     

Share This Page