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I tried real hard to get the lithiums. Had a great price for the individual cells that would have been the same price as agms. But unfortunately the supplier quit returning my calls and emails. Guess they decided they didn't want the liability or to provide tech support. Lithionics who makes their cells here in the USA did give me a discount but the price for 2 450 amp hour batteries would be over $9500. Too much for me to spend right now. I would still love to go to lithiums but there is NO technical support just yet. Most of the suppliers, other than Lithionics, are designed for the electric vehicle drive systems which are high voltage systems. I learned a lot doing research and still believe lithiums would be an awesome house battery system. Just couldn't find anyone interested in selling to the RV market, other than Lithionics.
So yesterday Steve Magown helped me pull out 4 8Ds and get rid of them. My coach has 4 batteries in one compartment and 2 in a smaller compartment. I need to have the battery rack rebuilt since the acid has eaten up some of the metal rack. Then I'll clean and paint the compartment and rack. Thinking of using something like Zero Rust.