I am preparing to start a dual battery set-up. After days/weeks of research and debate of ACR (Automatic Charging Relay) vs DC-to-DC I have settled on the Ctek Dc-to-dc system. My eyes are a little watery and brain a little mushy from all the information out there so I wanted to post my plan and get some opinions from the pros (that would be you guys). Here is what I am planning. What are your thoughts? The 300A fuses seem like a lot but that is what the manual says.