36V 10Ah 30A(50W-1000W)

36V 15Ah 40A. 36V 20Ah 40A. 10Ah,15Ah,20Ah, and 30Ah represent the battery capacity and indicate the range. 36V 10Ah 30A. If it's 36V, buy a 36V battery. If it's 48V, buy a 48V battery. 48V 15Ah 40A.