For those of you who are adding inverters to your trailer, you're going to need some pretty big cables to go from the battery to the inverter. There are a couple of options for cables. You can use starter cables from the local auto parts store. This will work but there are a couple of problems with them. Most of the cables I've found are a #2, which limits your inverter size to around 1000W (depending on the cable length). Also, the insulation is cheap and the cable ends are crappy - flimsy and prone to corrosion. You're also stuck with whatever length they have. Another option is to have them made by an electrical shop using welding or locomotive cable. This will get you a better cable in just about any size and length you want but can be expensive.
Another option is to make your own. I used #1 marine cable from eBay with fusion cable lugs, which is good for
245 amps outside the engine compartment. The fusion lugs don't require any special tools. You can buy a tool for crimp lugs but a good tool is expensive and I knew I probably wouldn't use it again for years. The cheap tools give you a sketchy connection so you get what you pay for. I got the fusion lugs and heat shrink tubing from here:
Lug Linky
There are two kinds of lugs that don't require a crimping tool, compression and solder. I've used both and I like the solder connections the best. Here's a video on how to solder the fusion lugs on, it really is as easy as it looks in the video.
Youtube Fusion Linky
Here's a picture of a cable I made to go between the two 6V batteries in the Boxcar. I color coded the ends to show the positive and negative sides of the battery (yeah, I'm kind of anal about wiring)
Bruce
P.S. Here's a link to
recommended wire size for inverters.