OK, on with other Load options.
Here's a rather interesting inexpensive idea.
http://www.neon-john.com/EV/Battery_...ester_home.htm
It's a 500amp load tester that uses a carbon pile for resistence.
I would think this could be modified with additional heat sinking to handle the load. Afterall, 12 volts at 500 amps is 6000 watts.
