[Bruce Edwards]

The fan only runs for a few minutes and will not cause any harm to the battery. Again here in Florida were it can be in the 100+ range in the summer it works very well. Never had one of our cars not start due to our fan set up. If some of the big three can set up there cars in a way much like we use and not have a problem with all of the new electrics on those I do not see the problem.