Forum Discussion
Almot
Jun 29, 2021Explorer III
obiwancanoli wrote:
One of my concerns here is how much power it may draw if left powered by the SUV's battery system... from what I can surmise, it doesn't draw a lot of juice, but of course, I don't want to drain the SUV battery either.. any thoughts out there as to the workability of my plan?
Forget using your SUV starter battery. You need a separate and rather big battery for this. They draw A LOT of juice. I don't know how people measured 2W (??), this is too low even for a 28L single-zone unit. My 50L dual-zone unit by another brand, with freezer 4F and fridge 40F draws 30-50W. On a standby - no cycling - it draws 2W, yes.
What's the worst is that it runs 70% cycle with the end-result 45-50 AH per 24 hours at ambient 77-85. In a single-zone mode, no freezing, the entire box at 4F, 50L box should draw 20-25 AH per 24 hours. Maybe 20 AH for a smaller box. You need 100 AH deep cycle AGM or flooded battery to last you 2 days, for cooling only, no freezing. Or 50-70 AH Lithium.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,187 PostsLatest Activity: Jan 14, 2025