What make and model is your 20 year old charger????
For TWO Trojan T-105's in series. 220 amp hours. I would recommend the following
IF converter is seperate from power panel Progressive Dynamics 9260
If converter is attached to power panel Progressive Dynamics 4660
(NOTE last two digits are max current 60 is about the smallest they make)
If you really want to baby them.. Well a smaller converter would be good (down to about 30 amp) but I use 30% C/20 as recommended by Xantrex.
OR take the chance to upgrade to a Inverter/Charger such as an Xantrex Freedom XC-1000 so you can watch TV without Shore/Generator power. (Frankly I do not recommend the freedom line. I mean it works.. but I'm still having issues with the settings on mine. IT does nto always work).
