I have two battery banks, one with only one small battery type acid flooded type for engine start, and the 2nd battery bank with 4 AGM group 31, 105 AH in parallel. I want to change my old SENTRY, model GS120-2NXJS, 20amp (1994) battery charger and I found a new VICTRON Centaur 12 V 50 amp charger. Any one have any review on this cahrger.?