dava71 wrote:My question is this - if chargers are spaced approx 30 miles apart, which strategy will result in the shortest travel time
A) driving fast (65-70 mph), stopping at every charger and charging to 80%
B) driving slow (55 mph), stopping every 50-60 miles and charging to full...
dava71, thanks for your post and congratulations on getting a C-Zero!
Great question! Shortest travel time vs. 'safest' strategy, hmmm…
The dilemma we face is that the best utilization of CHAdeMO occurs when the battery is almost empty: full CHAdeMO power can be applied for a good part of the recharging cycle and a lot of miles can be infused in a relatively short amount of time. If the battery is half-empty, then full power is only applied for a few minutes before it starts tapering off. In my case, it always stops at 80%SOC. The problem with this strategy is, as pbui19 pointed out, if a charging station is down then you're stuck and have to rely on 230vac which would negate any time savings you might have accrued along the way.
Since this is going to be your first excursion, I would suggest erring on the 'safe' side and plan on stopping every 30 miles to recharge, but also driving conservatively so you could make it to the next CHAdeMO charging station down the road in case one is down.
You have opened up an interesting proposition which, given an adventuresome person and assuming no station failures, would make for an interesting calculation.
Going 60 miles starting with a 80% charge would not
work for me...Edit:
I just re-read what you wrote and see that I did not properly answer your question. Charging to full, i.e., CHAdeMO to 80% followed by L2 to top-up, would not be time-effective as you will spend an hour+ topping up. Better to rack up another 30 miles and plug into CHAdeMO for 15 minutes to get to 80% and keep going. Our little cars do not lend themselves to long-distance driving if you're in a hurry.