And that's fine for "HIS" batteries. But while lifepo4 batteries are all simular they are not exactly the same manufacture to manufacture. Therefore, it is best to follow the recomendations of your manufacture and not a general recomendation. I prefer to error well on the safe side and set my alarm for 2.8v or 44.8v for my 48v pack. Many may consider this as a waste of capasity but I feel comfortable with it and I feel I have the extra capasity to spare. I run a ThunderSky 48v 20ah pack. Bob