Mike on cumminsforum also has his site mopar1973man.com runs his house on batteries and says the secret is to balance the charge once per month. Says that he routinely gets 10yrs out of the house and truck batteries.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.