I have a 5.9 liter Cummins 6BT in my 80 series which requires two 1000CCA start batteries wired in paralell. The Cummins starter will draw about 450 amps on start up, which means I need to rethink my backup battery setup...the Hellroaring BIC cant handle that much amperage. I have two start batteries under the hood and a 3rd deep cycle group 31 built into my storage drawers which powers up my fridge and other accessories...I may add a 2nd deep cycle to the AUX bank. I am going to be using a Redarc BCDC1225D DC to DC charger to keep that AUX deep cycle bank charged, I will also be hooking a solar panel into the BCDC once I figure out a good mounting solution. I would like the security of being able to link the starting bank and AUX bank to jump start myself if needed. Question: What options do I have for an isolator/combiner that will handle the current without getring damaged.