Battery recommendations for 1500W inverter

syperk wrote:
As I mentioned I'm seeing a significant voltage drop (~2V) when measured directly across the battery terminals when I turn on the load, and the resistance of the wires has no effect on that measurement. So, I'm still pretty sure that the internal resistance of the battery is the dominant factor right now, relative to the wires.

Thanks everyone for the responses. I have pretty limited space for batteries on the TT (it's a small one), but I think my best bet at this point is to get two 12V batteries with the highest CCA I can find (implying low internal resistance), likely AGMs, and connect them in parallel.

I'm still interested in hearing any battery details from people successfully running a 1500W or greater inverter, especially people with a 2-battery setup, which realistically is all I have space for.

Here's the two fairly high capacity Group 31 12V AGM battereis we're using in our small motorhome. I believe they're popular in the marine world. We don't use them to run a high power inverter though, and they cost almost as much as Lifelines: http://www.fullriverbattery.com/product/batteries/DC115-12