I'm not sure what specific batteries you are referring to, but two 6volt batteries at 300AH, equates to 150AH at 12V. I'm sure you already know that, but just to be safe, I thought I'd mention it.Hi JD,
Appreciate your feedback as well as the wealth of information you provide to many other members here on the forum.
You summed up my needs correctly.
The larger batteries you found were the same results I have initially discovered which lead me to ask if a higher amperage versus smaller size battery can actually exist.
I have determined that two 6 volts batteries @ 300AH are the way to go if I wish to have higher amps versus size but they will not fit under the hood.