So, Cole- feel free to move this if its worthy of its own thread. I just would like to learn more about House Battery options before I go with a direct replacement of the original Trojan in my 03 EVC.

I read the related threads on upgrades and solar, etc etc. Still slightly confused on options for direct replacement. Basically, I am after 1 thing and that is longer run time of the stock systems while off the grid.

Im not looking to run solar

Im not looking to run TV's and blenders

So, my questions are;

Can I just fit a larger Trojan 12v?
I see many folks doing two 6v Golf Cart batteries... advantages over a single battery? and does the stock charging system need to be changed?
I see a master power switch mod- is this just to prevent any ghost draws on the battery?

Before I drop the money on a new Trojan, Im just looking at options since I hope to not have to do this again for a few years at least!

Cheers from Maine Josh