Hi folks, 

I have a couple of quick electrical questions.  First, what kind of voltage output should an alternator be putting out?  I read 13.5 on mine, which seems low to me. Second, What are the top culprits for current draw on the battery while the van is sitting?  My van has been sitting for three days, and the battery is down to 11.5 volts. It makes it a bit cranky to start at that voltage.  It seems to crank fine after I've driven it for a bit, but let it sit, and down the voltage goes.

Thanks, 
Greg.
82 Westy