Bit of an update - first kit is complete and has been mocked up, writing instructions this week.
This first kit is centered around a very simple installation and the BlueSea 7610 ACR. It does not combine batteries if your main battery dies, but will combine batteries during charging and isolates batteries when discharging and when starting. I am assuming the installation does not include a high output alternator, but an 80 amp alternator like the truck came with.
I've also decided to use marine terminal fuses instead of circuit breakers at the batteries for a few reasons. First, for ease of installation, second it means two less cables and two less things to go wrong and it saves some money. With the dual terminal fuse at the second battery you can easily add a circuit breaker if you decide to make a run to the back of the truck. I know lots of people like to disable the power going to the back if they are working back there and this will still allow that.
Here are all of (90% sure) the items included in the first (most basic kit).
1. Blue Sea 7610 ACR
2. Blue Sea MRBF Terminal Fuse Block rated for up to 300A for the main battery
3. Blue Sea 100A marine fuse for main battery to ACR
4. Blue Sea Dual MRBF Terminal Fuse Block rated for up to 300A for the secondary battery - one terminal will be left empty so you have the ability to easily add another circuit to the back of the truck or an additional fuse block somewhere else in the truck.
5. Blue Sea 100A marine fuse for secondary battery to ACR
6. Four stainless steel M4x25 Allen head bolts, washers, and lock nuts for installation of the ACR onto the cruise control cover
7. 4AWG tinned marine cable for main battery positive terminal to ACR
8. 4AWG tinned marine cable for secondary battery positive terminal to ACR
9. 4AWG tinned marine cable for main battery negative terminal to fender
10. 4AWG tinned marine cable for secondary battery negative terminal to fender
11. 2AWG tinned marine cable for secondary battery negative terminal to engine block. Bolt for block included.
12. 14AWG inline blade fuse and holder for ACR ground to fender ground
13. Two Mil-Spec battery terminals for main battery - this allows OEM fusible link and wiring, along with the new terminal fuse block to be easily installed.
14. Installation Instructions
A more detailed picture of the positive terminal and connections at the secondary battery
More detail of the main battery to ACR Terminal Fuse connection.
For those of you interested. I need some feed back.
Right now, I am not planning on adding in Mil-Spec terminals for the secondary battery because I prefer the type of battery post shown in the picture. Is this okay?
I am also not planning on including any extra 100A fuses. I have been running my dual setup for nearly two years without issue. I figure if its done right, the risk is low of a fuse blowing. I will offer spare fuses to purchase but not include them in the kit. Thoughts?