It depends on the battery type. If it is a lead acid battery, the under voltage is 54V and the full voltage is 74V;
If it is a ternary lithium battery , the undervoltage is 54V. is 48V. The full voltage is: 67.2V;
If it is a lithium iron phosphate battery, the undervoltage is: voltage is: 46V and full voltage is 72V;