Couple of questions about DC-Dc charging
I've been thinking about adding a DC-DC charger now that I've added 400 amp hours of AGM batteries. There are lots of useful posts but I haven't run into a couple of things I'm curious about. One ...
Forum Discussion
noteven wrote:Although Renogy doesn't specifically say so, their cable recommendation chart is based on the one-way distance (not round-trip). If you use 30 ft of cable for the positive run, and 30 ft. of cable for the negative, your total one-way distance is 30 ft. FWIW, if the Renogy chart was based on the RT distance it would prohibit installation in many trucks with TT's/5r's/TC's. It took almost 15ft. of cable just to get from our battery to the very front of our truck bed.
I will be sizing cable based on the total length out and back of both + and - runs.
If the length from starting battery to DCDC is 30 ft I will use 60ft as my length...
Is this correct?
If your TV has a substantial enough negative/ground cable, you can use the frame for most of your negative run. That's what we did with our install. We ran 20-25 ft. of positive cable, then approx. 5 ft of cable for the negative run from the frame to the truck camper located in the bed of our truck. Our 40a Renogy's input load reading of 43.5a and output of 40a confirmed that we had a good install (minimal voltage drop).
