I would go to the following WEB site and check out this product. It will provide a continuous Desulfator mode anytime a battery is being charged. Using one of the other battery minder battery chargers, I recovered a six year old tractor battery that had tested bad in the store. After a while on the battery minder charger the same battery tested almost new in the same store. I am recommending the following item as you seem to have several ways to recharge your batteries and would have no need to add yet another battery charger.
Home Page
http://batteryminders.com/index.php
Recommended De-Sulfator
http://batteryminders.com/details.php?prod=OBD-12
I have two of the battery chargers from this company and will get two more of the on board units for my Car and Truck. So far the motor home is doing great with the Magnum inverter. I have not added any water to the batteries (two 6 Volt) since they were new two years ago. Granted I am plugged in all but two or three weeks a year and for only four of those days I am boon docking.
Unfortunately my battery bank will only carry us over night and I have to run the generator for part of the day to recover the bank. When I retire we will get to use the motor home more. I am still trying to figure out how to increase the battery bank size, but I am coming up blank. I hope to have a solution with in the next three years or so. Solar is also in the future. Good luck with your system and batteries. Ed.
