Family Life Is it okay to leave charger plugged in Tesla? Is it okay to leave charger plugged in Tesla? Yes it's recommended to leave your Tesla plugged in as much as possible and it will maintain the desired battery level. Set it to 50–90 percent normally and use 100% only when needed for an immediate departure on a long trip. Related Posts:EverStart Maxx Lead Acid Marine & RV Battery, Group Size 24DC, has been reviewed.Why is it called Tesla?How much will a Tesla cost in 2022?Amazon.com has a group 27 battery weight for deep cycle and electric trolling motor batteries.