Anyone know what is causing these messages at the local Super Chargers? Unable to charge - unplug and try again, followed by Unable to charge - Supercharging option not enabled message HPWC works fine at home. But I want to drive from Dallas to Houston next week and don't dare get on the highway not knowing if I can charge up. First time, I thought it was because I had an almost-full battery - just was going to top it up. Tonight I went to a different Supercharger, with only 29% battery, and got the same message. Thanks for help!