The instructions for the Progressive Dynamics Replacement Section for AC/DC Power Distribution Panel - 45 Amp # PD4645V have multiple model numbers on them since each model has basically the same installation instructions. They do breakout each model separately when they list the characteristics but I think what you're referring to is the note at the very bottom that states "The 4600LI series converter/chargers are designed to recharge lithium iron phosphate (LiFePO4) batteries only".
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