How many hours does it take to fully charge a 48V 20Ah battery normally?

[McBrynlee]

Approximately one kilowatt-hour. A 48V 20Ah battery means that, under ideal conditions, it can deliver a 48V 20A current continuously for one hour when fully charged. Specific details are as follows: 1. Formula: The unit "kilowatt-hour" is actually defined as the work done by electricity, where work = voltage × current × time = 48 × 20 × 1 watt-hour = 960 watt-hours = 0.96 kilowatt-hours = 0.96 kWh. The charging capacity of an electric vehicle battery is generally 1.05 times the discharge capacity, taking into account factors such as charging losses. 2. When fully charged: If a 48V 20Ah battery is brand new and fully discharged before charging, theoretically, it would take 48 volts × 20 amps × 1 hour = 0.96 kilowatt-hours, which is 0.96 kWh, less than one kilowatt-hour. However, in practice, factors like temperature and battery aging prevent it from reaching the theoretical value.