It looks like a 13 strings of 8 cells in parallel battery (13s8p). (48 volt pack). The discharge supported by the BMS seems to max out at 45 amps, with a MAXIMUM charge rate of 10 amps. The real charge and discharge rate is determined by what is printed on the side of the cells. That information will "fill in the blanks" as to what the upper limits really are. The cells will likely have a manufacturer and model number printed on them. You can then look up that model number for its maximum discharge rate, and charge rate is. The MAXIMUM figure for the pack will be the lesser of 8 times the single-cell rating or the BMS rated values. From the picture I cannot tell what size/model those cells are.
Oh, and yes, it is a 48 volt pack.