This Ebay listing for HLG-150H-48A is likely the best deal for an adjustable 12s 3.2A charger ever. MeanWell makes high quality efficient stuff - this charger does does not need a fan because it is 93% efficient.
Both voltage and Current are adjustable. It is CC/CV. Read the Specs.
Tip: Shipping is much more reasonable if you buy 3.