Every 10-15K miles I do a battery stress test. I drive a 250 mile loop on paved road and drain the battery. Average speed is around 62 mph and a lot of elevation gains and lost. In cold and windy weather I barely complete the loop. Nursing last 30 miles of switchbacks in conserve at 3000'...
No not much. If I do it's light. The total efficiency indicated is not correct. I constantly get about 2 mpk on average including extreme wx and elevation gain/loss.