eyedrop wrote:Is it possible to buy the 20amp EVSE upgrade and charge off a 110v 20amp circuit, setting the EVSE to draw 16 amps? According to my calculations, this would yield 1.9Kw. A nice little boost over standard 12A. Its easy to find 110v 20A circuits at businesses with outdoor outlets...
Its unfortunate the EVSE upgrade has a max of 20A. I wonder if they are working on a 30A version for the future? Is there a portable charging chord capable of 30A? Looks like the best Ill get with 20A is 4.8 Kwh... Which is reasonable. But in the future with higher capacity batteries, these slower L2 chargers would take eternity to charge a battery to full.
In general, EVSE Upgrade sets the maximum rate for 120V to 12A so that it will not overload a 15A circuit. I tried to have them set up the unit from my 2011 for 16A or 20A maximum on 120 volts, but they would not do it even though I was willing to sign whatever waivers they needed stating I understand the risks and limitations. They set up the 2011 unit with their latest internal hardware/firmware at that time (March 2015) so it is adjustable from 6 to 12 amperes on 120 volts and 6 to 20 amperes on 208/240 volts. The cable, J1772 connector, and internal components limit the maximum to 20 amperes continuous. The later units are limited to 16 amperes maximum.
There are other portable EVSEs available that have higher maximum currents. Juicebox, http://www.quickchargepower.com, and others offer units up to 40 amperes for use with 14-50 receptacles.