Since the Progressive Dynamics 9300 Series RV Converter Charger # PD49RR can work with both lead acid and lithium batteries it's going to be the better option over the Progressive Dynamics 9100 Inteli-Power Lithium Converter # PD9130LV, which is only lithium compatible. If you wait to buy the lithium batteries or decide later on you want to switch back to lead acid you won't have to purchase a new converter in order to be compatible. view full answer...
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