Two 6 volt batteries or two 12 volt batteries ??

lawrosa wrote:

SoundGuy wrote:

skipro3 wrote:
The reason I bought 6 volt batteries is because each plate is much thicker than the 12 volt batteries.

Which is why their internal resistance is significantly higher than those in 12 volt jugs, which in turn results in greater voltage drop under heavy load from an inverter. 12 volt AGMs in particular offer significantly lower internal resistance and for those running an inverter can be the "best" choice. ;)

I never read anywhere about this voltage drop... How much are we talking about? I run an 1100 watt inverter. I have 3 24 group batts @ 75 ah..

I run 800 watt toater oven and coffee maker.

I ran #2 wire 5 feet maybe..

How much worse will the voltage drop be with 6 volts?

I been meaning to go 6 volt but now this threw a wrench in the works...

You will be fine with 6 volt batteries. Remember voltage in batteries is dependent on draw. I = V/R. Your 1100W inverter will be fine with a pair of 6V batteries or even better with 4.
FWIW, I run a 1000W inverter to power a small 120V fridge and the entertainment gear. Voltage may temporarily drop into the high 11's with use but that is OK. With your recent abundance of solar power, I'd suggest to size your battery bank to the amount of solar charging available. A guy can't have too much free power. :B

BTW, I have both 12V and 6V batteries, three 12V AGM's inside near the axles and 2 6V's inside near the axles in a vented box. The two banks can be switched but I typically keep them drawing/charging together.
Since I now have a big piece of a planned 12V upgrade (inverter), I'll be looking for more solar charging and more batteries. A guy can't have too much power. ;):B