Hi John,

My charge was free (anybody passing San Carlos on 101 during office hours can 
drop by EMW and get a free CHAdeMO charge, this is an invitation they made 
publicly a few weeks ago, as they want to make sure their new Fast Charger will 
be compatible with as many vehicles as possible, so if you have a unique 
solution like your JdeMO converter, I encouage you to contact EMW and drop by 
to verify that it is compatible while getting free juice.
BTW, my charging session probably lasted shorter than 30 mins but I was not 
paying attention as I was chatting with people from EMW about the design of 
their Fast Charger (at that time it consisted of a set of circuit boards layed 
out across a lab table, cables running through current clamps, laptops attached 
- all the good stuff that makes an engineer's heart leap.

As you saw, the pack was charged to much higher SoC than 80% so that made the 
trailing part slow, if I had trusted that I could get a charge, I would have 
arrived with lower SoC than I did now since it took less than 10 mins to go 
from 40% to about 60% (which in itself can be a valid charging session if you 
have little time and do not need the additional charge to complete your trip - 
I expect that pricing on charging is deliberately set so high to encourage 
people to charge as short as possible and serve as many customers as possible, 
so if there is no per-session charge and you can complete a trip with 60% 
charge while having only 40% then a ~10 min partial fill up at a rate of 10 
cents per minute should give you all you need and have you back on the road. If 
you can suck down avg 40kW during that 10 mins then you have accumulated almost 
7kWh which is not too shabby for a $1 fee. That translates to almost 30 miles 
of range so you pay less than 4c per mile (in addition to the monthly fee) for 
that EVgo on-the-go.

I did shell out the $5 to register for the incidental (Flex) plan as I do all 
my charging at home and at work, so I only have this as "roadside assistance" 
insurance, in case I ever get stuck with no charge and no convenient place to 
trickle or L2 charge while doing something else, so then the Fast Charge option 
may save the day. Only I need to find my EVgo card and put it in my wallet 
together with the Blink and ChargePoint cards or there will be no charging 
anyway...

Cor van de Water 
Chief Scientist 
Proxim Wireless 
  
office +1 408 383 7626                    Skype: cor_van_de_water 
XoIP   +31 87 784 1130                    private: cvandewater.info 

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-----Original Message-----
From: EV [mailto:[email protected]] On Behalf Of jgblair via EV
Sent: Friday, September 02, 2016 12:34 PM
To: [email protected]
Subject: Re: [EVDL] Lawrence's CHAdeMO network : Sac to near-San_Diego on I-5

brucedp5 wrote
> A 10% to 80% L3 20+kW charge would be 70% of the 21kW an ~80mi Leaf uses
> of its 24kW pack. So a L3 charge on their EVSE would cost: (21 * .59)
> +2.95= $15.34 to regain (.7 * 80= ) 56mi.

 
Bruce, I get a different calculation result, so I am confused.  Did you mean
70% of 21kW = 14.7 or 70% of 24kW = 16.8? For example:

70% of 21kW = 14.7kW so cost would be 14.7 * .59 + 2.95 = $11.62 for 56miles
= $0.208 per mile.  Am I doing it wrong?

For comparison, on an EVgo Flex Plan (no monthly charge) is it 20¢/minute
+$4.95.  You probably know better than I do the charge rate, but I
understand it is about 80% in 30 minutes = .8*80 mi = 64mi for a cost of 20¢
* 30 + 4.95 = $10.95 for 64 miles = $0.171 per mile.

Cor van de Water charged his Leaf from 40% to 88% = 48% in 30 minutes on a
44kW CHAdeMo.  He did not disclose his pricing, but at the EVgo pricing
rate, it would have cost $10.95 for .48 * 80 miles = 38.4 miles => $0.285
per mile.

Under the EVgo "On the Go" Plan, you pay only 10¢ per minute, no session
charge, but a $14.95 per month.  If you travel a lot and use CHAdeMo, then
it is obviously a lot cheaper to use EVgo if they are available.

I am concerned about pricing because I am having a JdeMO (CHAdeMo adapter
made by QuickChargePower) installed in my 2013 RAV4-EV and am looking for
the best combination of speed, cost, and convenience to travel between the
Bay Area and Southern California.  I have a choice of going down Hwy 101,
I-5, or Hwy 99.

John
John Blair

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