On a side note are you running any Renogy products? Solar etc? I thought I had seen a setup in your Tahoe build thread and wondering if you could comment on your opinion of the products.
I don't have a very heavy electrical load in my rig my fridge can run for two or three days with no problem and we seldom plug anything else in unless underway maybe a light getting ready for bed. The fridge also has a battery minder to let me know if voltage gets to low and goes into a limp mode first then shuts down if voltage gets to low.
I do have three 45 watt solar panels I have never used and most likely never will. They are too big and I have no place to mount them it is very low on my priority list for now.
For my power I have two of the largest batteries I could fit in the stock battery trays and they are hooked together full time. Installed as a parallel distributes the amount of discharge equally to both batteries. If I was going to sit in one place for more than a few days I would simply disconnect one to keep it charged enough to start the rig. I may get a small roll up panel big enough to charge a battery in the remote case of them getting to low to start the truck. Or I may just buy a mini battery jumper. I do have a few 2 KW Hondas generators if I think I will run a lot of power on a trip.
If I was going to sit in one place for more than a few days without starting the rig I might consider something but, even then if you just start the motor for 20 or 30 minutes it will charge batteries up pretty fast.
Figure out how much power you need and for how long then add a 50% buffer and determine what you need. You have plenty of room for a secondary battery for a solar unit if you choose to go that route. Do not use a lead acid battery inside they are safer when vented outside so you wont have a gas build up inside. Most solar units are using other types of batteries.
