An update to this thread.....
Early in my RV's life I was having issues with premature failure of the PC-680 batteries.
I just replaced my now 6 year old PC-680 not because it failed but just because I want to be proactive before it lets me down somewhere away from the home drome. It will now go on the ATV or mower.
Back in 2013 I changed how I maintained the charge on my battery which I am convinced help it live a normal life.
- Fly more, let the alternator do the charging!
- Don't use the Odyssey Ultimizer Charger!
- Don't use a trickle charger continuously (can be done with the correct charger but the details are specific, too much trouble, just don't do it)
- Don't use a smart charger without the proper charge profile!
- Don't use a smart charger on a battery that does not allow the charger to go thru its full charge profile. (not discharged enough)
- Use a ground power supply when running the panel in the hangar to prevent discharging the main battery to a point where it needs charging.
- Don't leave the airplane sitting with less than full charge on the battery, doing so will lead to rapid sulfation.
Bottom line is that sulfation will kill these batteries in short order and improper charging/storage can lead to rapid sulfation. Don't store the batteries at less than full charge and don't charge the batteries with less than the recommended voltage/current level. Following the recommended charge profile is key!