OP
will do.. its pretty new.. it is about 1 yr old..i have a small one to no good batt avl for mine im going to get some back batts anyday now and for you just get the hc2400 for the back run 1/0 to it and you will do fine but your volts are droping that low fast trust me the batt is going bad get it checked
when mine was bad it sat at 12.6 volts and with car running 14.1 and still had a bad cell volts would only drop fast with the added load take the load away the batt volts would go back upya but what if they don't do the load test at the place i got it? it holds volts perfectly otherwise.. and last time it died on me i had this system as well.. last time it just straight up died.. held a charge of about 10.5 car off.. 13.3 car running