123000 watts / 11500 watts = 10.69 hours of charging. 40 miles * 10.69 = 427 miles. Your truck has a range of 318. 318 mile /10.69 hours is 29.7 miles per hour charging at 11.5kw. Factor in efficiency and other crap and there's your 27 miles added per hour.
Mine got stuck a few inches from the fully closed position. Would not open or close from that point. Turned on service mode and there was an option to calibrate the cover.