Ed & Joel,
Thanks for your input. It seems as passionate as we are for our coaches, there is always room for improvement to protect our investment. That was the nature of my question about heat generation. It appears we have 4 choices concerning this device. 1- replace it and leave it as designed, 2- enclose the unit against vapors, 3- seal the electronics with epoxy coating, 4- relocate the echo charger to a less hostile envoirment.
I think if it is within your ability to do mechanical repairs, the best choice would be to relocate it away from battery fumes and moisture.
Regards, Fred