Found Problem. Was NOT the charging system

[Roleketu]

I did a similar setup. I installed a six fuse panel relayed with 10 gauge wire, fused, to the battery. I used the "Accessory" power at the OEM fuse box for keyed power so when the key is off all power is cut to the fuse box. I've been running my GPS, XM Radio, cell phone charger, two extra driving lamps, and about twenty or so add on marker lamps without any issues.