1
What is? charging voltage
voltage when the charger is safe for the electric vehicle charging.
2
To develop
no-load voltage of the charger – for three-stage charger for this voltage is said float voltage, usually a single battery 13.5v-13.8v (there are marked on the battery in general, can also be found according to the manual), then for the 36v is: 40.5v-41.4v, 48v, compared to the : 54v-55.2v. Therefore, taking into account your multimeter error, 53.6v and 55.6v seems are considered normal, after all, has been transferred into the floating stage and lights, so its value is required so it is not very harsh.
charge voltage
Charger – This voltage is called the turn lamp voltage, typically a single battery 14.4v-15.0v (marked with a general secondary battery, may be isolated according to the manual), then for 36v is: 43.2v-45.0v, 48v, compared to: 57.6v-60.0v.
The actual charging end voltage charger – for sealed batteries, its value should be the best to 2.4v per cell, corresponding to 36v so as 43.2V, the correspondence of 57.6v 48v. But in fact the reason for an appropriate increase in this value is out of the charging time and “full” to consider, which is 36v is 44.4-44.8v, 48v to 59.2v-59.7v, but this is likely to cause water loss , shorten battery life, both advantages and disadvantages. It is not easy to figure out, just know that here is how to determine the value of voltage on it.