... as E-scooter, golf cart/trolley, E-sightseeing car, postal van, road sweeper, industrial sweeper, ride-on floor sweeper,cleaning ... contactor or not;3. We strongly recommend customer to use two contactors (one for charge and another fordischarge) in the battery system ... system capacity More information, pls feel free to contact Coco Guo for support! 51.2V110AH for e-golf cart, e-sightseeing car...