I live in SF and commute daily to San Bruno, 14 OW or 28RT, plus some stops on the way home. I figure 30 miles average daily. Now I can charge for 8.5 hours at work on 1200V. On days that I'm at work longer, I can sometimes get the car to 98%. The car is outside in the sun while being charged, but day time temps rarely ever get over 80 degrees during the summer. If some how get charged to nearly 100 percent, I'd drive home and should use 15-20% depending on route and traffic. Using this senario, I don't need to charge at home, and return to work the next day, and the battery level is about 65%. I still don't charge, and complete another RT back to home and work the next day, and battery level is then at 25-28%. I'll charge as long as I can, sometimes reaching 70-80%. But if I stay at work longer, I can get it to almost 100%.
So should I charge daily to 80% at work, or charge to 100% whenever I can, so I can skip a charge day. I may try to see if an 80% charge at work will get me 2 RT's back to work, without having to charge at home.