Bolt EV on 350kW charger

Discussion in 'General' started by JyChevyVolt, Aug 12, 2018.

  1. JyChevyVolt

    JyChevyVolt Active Member

    "MemberJoin: Apr 2018Posts: 76Osceola Arkansas

    about 1 hour ago · #1
    First full charge 3% to 100%

    I pulled a crazy stunt the other day, I drove to the nearest ccs fast charger (75 miles from my home) after starting out with an 88% charge (hill top reserve) and commuting to work… I checked the charging station to make sure it was fully operational and then drove around at high speeds to deplete the battery. Even being 100% confident that I could make it back to the charging station, when the last bar started franticly blinking it put range anxiety into overdrive
    When I plugged into the charger I had 3% SOC. Charging from 3% to 80% was the cheap part of the charge and the other half (the expensive half) was charging all the way up to 100% in order to get a data log from near zero to full charge on a 350 KW CCS station. That first 46.2 KW cost me the same amount as the 12 KW I gained in the second half of the charge.
    Here are some mile stones:
    • 13% (gain of 10%, 24 miles of EPA range) in 8 minutes.
    • 23% (gain of 20%, 48 miles of EPA range) in 15 minutes.
    • 33% (gain of 30%, 71 miles of EPA range) in 23 minutes.
    • 43% (gain of 40%, 95 miles of EPA range) in 30 minutes.
    • 1st step down 55 KW to 40 KW at 49% at 34 min
    • 53% (gain of 50%, 119 miles of EPA range) in 38 minutes.
    • 63% (gain of 60%, 143 miles of EPA range) in 47 minutes.
    • 2nd step down 40 KW to 25 KW at 66% at 50 min
    • 73% (gain of 70%, 167 miles of EPA range) in 61 minutes.
    • 3rd step down 25KW to 18 KW at 81% at 74 min
    • 83% (gain of 80%, 190 miles of EPA range) in 77 minutes.
    • 4th step down 18 KW to 11 KW 91% at 95 min
    • 93% (gain of 90%, 214 miles of EPA range) in 102 minutes.
    • 95% (gain of 92%, 219 miles of EPA range) start of final ramp down 112 min.
    • 98% (gain of 95%, 226 miles of EPA range) in 121 minutes."
    Total cost:
    63%, $1 + 47*.30 = $15.10
    73%, $1 + 61*.30= $19.30
    98%, $1 + 121*.30 = $37.30

    bwilson4web likes this.
  2. bwilson4web

    bwilson4web Active Member


    I've zipped up the OpenSource spreadsheet.

    My approach on charging economics is to look at the charging rate versus local electrical rate. For example, it costs $0.10/kWh or $0.0017/kWm. At $0.30/min, you are at 55 kW, paying for $0.092/kWm or roughly three times the local electrical rate per hour (note change of time scale.) But we do this to avoid having a two-car hybrid: (1) EV, and (2) gasser.

    Now this is a problem:
    There are two CCS standards, V1.0 limited to 80kW, and V2.0 limited to 350kW. But your car electronics and/or control laws limit it to 55kW. No need to plug-in to a 350kW station if a lower rate charger is available.

    What is the L2 charger rate for your car? It may make economic sense to unplug from the fast DC charger and top off with a cheaper, J1772 plug.

    Bob Wilson

    Attached Files:

    Last edited: Aug 12, 2018

Share This Page