6 or 12 volt batteries on towed unit
First of all, let me introduce myself. I'm Jeff from NW Wisconsin and West Central Georgia.Yep, a snowbird. I make at least 2 trips per year and camp on and off the rest of the year. I "tented" until ...
Forum Discussion
If your intending to draw more than around 1000W (80+ amps) on a regular basis, then a bank of 12V wired in parallel will likely be a better choice than a bank of 6V.
Why?
1) 12V have much lower internal resistance so less voltage drop under high load conditions.
2) you will have more batteries in parallel to share the load, so for example when drawing 100A from a pair of 6V EACH much supply 100A, while a bank of two 12V each must supply only 50A along with much lower internal resistance. Going with 4 12V against 4 6V drops the 12V draw to 25A the 6V to 50A.
My experience is that nearing 1000W inverter draw you need four 6V to be able to run the load at below 80% SOC.
Trojan will give a much similar recomendation. 6V wins with lower current draw along with a much longer cycle life and deeper discharge limits (25% SOC), while 12V wins with high draw but sacrifices some in cycle life and less discharge limit (50%SOC)
Why?
1) 12V have much lower internal resistance so less voltage drop under high load conditions.
2) you will have more batteries in parallel to share the load, so for example when drawing 100A from a pair of 6V EACH much supply 100A, while a bank of two 12V each must supply only 50A along with much lower internal resistance. Going with 4 12V against 4 6V drops the 12V draw to 25A the 6V to 50A.
My experience is that nearing 1000W inverter draw you need four 6V to be able to run the load at below 80% SOC.
Trojan will give a much similar recomendation. 6V wins with lower current draw along with a much longer cycle life and deeper discharge limits (25% SOC), while 12V wins with high draw but sacrifices some in cycle life and less discharge limit (50%SOC)
