48v20ah can not use 48V32ah charger.
Because the jack between the two is fundamentally different, it cannot be used universally. The former can be a double-port socket, and the latter is the plug of the wound can not be inserted at all, in addition, the former is the highest he supports 60w fast charging, and the latter reached 1.2 million, so if the 120w charger is charged, it is possible to burn the circuit of the board
Agreed. As long as the nominal voltage of the battery is also 48V, you can charge a 20a battery with a 48v32a charger.
In the daily charging of the battery, the general charging current is charged with no more than one-tenth of the battery capacity. For example, the battery is 48 volts 20ah, then the charging current is generally controlled at about 2 amps. Therefore, it can be charged with a 48-volt 32a charger.
48V32A charger with 20A battery can be used temporarily, 32A charging 20A battery is a little too fast for long-term use will charge the battery drum