Thanks to all for the replies. Our coach is a Tiffin Allegro Bus w/Cat 3126B engine. The inverter is a Xantrex Freedom 458 inverter/charger. I cleaned all terminals and filled the wet cells to proper level just before storage. I plan to check the voltage and/or run the generator once a month so long as I can get access to my coach. I'm not sure if I have the temperature sensor probe on my inverter, I will check that out on my next trip to the storage.