Thank you all for the help - will let you know what I find and it may take some time. We're full-timers, always plugged in, and I've got to find this amp drain. I disconnected the Xantrex 458 inverter/charger and used an external charger to eliminate that possibility. Also, the BCC has checked out okay (even pulled all the load fuses). I just can't afford to pay a mechanic $120/hr. to scratch his head like I'm doing:-)) Next step is to unplug, turn off everything, record amp and voltage readings with the key off, then on, and then with the engine running.