I will be upgrading to a 2 battery system the end of April just before I add a 100 watt solar panel system to my '86 Sovereign
25'. I only have a curb side battery box on the front of the trailer now. I'm caught between having the storage box behind the propane tank cover cut out and a deeper box welded in or just cutting the bottom out and having a box welded around the existing one which will increase box depth from 7 5/8" to around 11". Right now there would be just enough room to put in a battery (post facing street/curb side), slide it forward a couple inches and then put in another battery and slide it toward the trailer body. Since there is a 1 7/8" lip under which the second battery could slide toward the trailer and another 3" the first battery could slide toward the front of the trailer, I would probably have to put a spacer in between the 2 batteries. External size of box front to rear is 17 5/8", plenty of room IF the depth was increased. Internal width is around 12 1/4", just enough for the grp. 27 battery.
The question is, ground off welds and put in a new box or just cut the bottom of the box out and weld a deeper box around the existing one? I would also move the regulator toward the top of the tanks rather than where you see it on the left side of the picture at the bottom of the tank cover. The wiring should be straightforward as I would replace the current cables with slightly longer ones if necessary. Any comments or suggestions?