Mex a typo, I think you meant 58.8 not 48.8v.
For 14s you need at least I would say a Meanwell HLG - 120h - 54A, the A is important as this designates the model as having current & voltage adjustment. For this model it is max 2.5a in put current and all A models have +/- 10% voltage adjustment above and below 54v. The 54B has no voltage adjustment so imperative you buy the 54A identifier to the model. The only thing you will need to do is change the charge connector.
There are other ranges HLG -60, HLG -80, HLG -100, HLG -150 etc going at least up to HLG - 320 & HLG -600 it all depends on the current you want and input wattage for charging which is in the spec sheets on the Meanwell site or the vendors site.
These little beauties barely get luke warm because the ali shell acts as the heat sink.
HLG-120H-54A is a 124.2W 54V 2.3A Single Output LED Lighting Power Supply with 90 ~ 305 VAC input voltage available to buy from Power Supplies Online
www.powersuppliesonline.co.uk
HLG-150H-54A is a 151.2W 54V 2.8A Single Output LED Lighting Power Supply with 90 ~ 305VAC input voltage available to buy from Power Supplies Online
www.powersuppliesonline.co.uk