Hi, all!! In my earlier comment regarding my chassis batteries being at 11.9 volts, I had not re-charged them after installing the new house batteries. I did this deliberately, knowing that if I had not solved the problem with new house batteries, the chassis batteries would have been lower than 11.9, as I had experienced. In any case, I no longer have a discharge problem with either house or chassis batteries! Perhaps the echo charger is defective, but that is an issue for another day!! Also, I have deliberately left the master switches closed to further determine that the problem is solved! I've been going to the storage area every couple of weeks, and all is well! Yesterday the house batteries were 12.7 volts. I did not measure the chassis batteries, but generator started easily. We depart Aug 12 for a couple of months on the road (see you all in Canyonville?), so we'll know more after that. Thank you all for all of your comments....all are appreciated. Blessings. And, God Bless Bill Maloof.