Go ahead and charge to 100% GM engineering has confirmed the car is designed to be charged to 100% daily. some people like to have immediate regenerative braking in which case you can change the charge level. 95% will allow you full region from the start of your drive. I always charge to 100%I recently purchased a 2020 bolt and drive 160 miles round trip 3 days a week and 188 the other 2 days. Should I 100% charger every night? Or would 80% be good enough. I live in central Missouri I'm anticipating 100% in the winter months for sure to complete my trips. Any thoughts or opinions welcome.