Bolt EV on 350kW charger

[JyChevyVolt]

"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

Source: https://www.chevybolt.org/forum/90-...how-many-m-kwh-you-getting.html#/topics/29689

 

[bwilson4web]

Thanks!

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:

1st step down 55 KW to 40 KW at 49% at 34 min

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