Just what the doctor ordered. I converted a 48v Club Car golf cart to 4 12v lithium ion batteries. Because there are 4 of them instead of just one, they don’t all deplete at exactly the same rate. So, when I plug in my 48v charger that they are all connected to, once the first battery hits full charge the BMS kicks off the charger leaving the others with just a little under their 100% charged capacity. Over time that gap grows so about every couple of months or so I’ll put this charger on them to charge all 4 up to full power. If this charger was waterproof (which it is not hence the 3 stars for quality) I’d just leave this thing hooked up and use it every time I charge my batteries. It’s a little bit of a pain hooking up all the cables when I do use it but since it’s not waterproof I don’t have much choice. Overall it’s a great charger. Make it waterproof so it can be permanently mounted and hooked up and it would be an awesome charger.