Chassis batteries not charging
I have a 2006 Tiffin Allegro Bay 38TDB Freightliner 26000. I currently have a TrippLite inverter/charger and have been plugged in to shore power constantly for over a year. I had to replace the 3 year old house batteries a couple of months ago due to the 12v system going down several times. Before the haters start hating please know that I never contemplated owning much less living in an RV. I got cancer and lost my home in 23 and was forced into this life. I am mechanically inclined and most of the repairs I have had to do myself as I now live on disability. Mechanic's daughter. I start the coach every once in awhile as I feel that it's necessary to let the fluids flow periodically in any engine. Yesterday, I went to start it since I'm moving to a different location and when I turn the key....nothing. That is the first time it hasn't started.Attempted to disconnect the series (2 6v deep cycles wires in a series) to charge them individually, and the charger won't charge. My voltmeter read 4.7 in each 6v. Help!?!? I don't know what to do now. Please be kind and helpful. I don't need negative comments. Thank you in advance for any help offered.