It's my understanding that our favorite ingineer at evseupgrade.com now offers a selectable charge rate on the conversions he does. I just learned about this a few days ago. Here is a quote from the site:
You also get easily programmable amperage settings, so you can "dial it down" if you are on a limited power outlet, or you really want a "trickle" charge, say for example; in airport long-term parking.
That's what I've been waiting for, and I plan to finally get my charge brick upgraded.
jstack6 wrote:FYI, Tesla has this feature, you can streach your charge over the low rate period or anytime you want. They can also cut it down so they can use a BLINK that only handles 30 amps or even lower at a friends home that may only have a 20 amp ckt. Someday all EV's will have basic features like that. My 2013 has a few extra options than my 2011 had and each year I expect more.
The J1772 protocol (and one of the reasons you pay all that money for something that isn't much more than a wall-plug adapter) works in a way that the car automatically knows not to draw more than the EVSE can handle. There may be some variations when Tesla is involved, since they don't use J1772 directly.