[Mike Copioli]

The theories taught do suggest that it is a bad practice. However, it in fact is a common practice that works. I have had to contend with the perils of parallel placement of lead acid batteries in my truck and also in the ambulances at my workplace. The perils being when one battery dies(end of life cycle) it takes the other ones with it. That is why it is recommended that all batteries in a parallel bank be replaced at the same time. I do appreciate both theory and practical application. I also believe that whatever works..works. Which suggests to me that sometimes theory is just that...theory. To answer you query David, I have had the same encounters with UPSs and also with Hi-los. Boats do the same thing. There is a selector switch for 1,2 or both. Good luck at all of your regionals. I am looking forward to continuing this discussion at nationals. After we win of course.

Ha ha.