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Amazon.com: Wagan EL7410 12V 25A DC to DC Battery Charger with Solar Input MPPT Controller for SLA, Flooded, Gel, AGM, Calcium and Lithium, Using Multi-Stage Charging in RVs, Vehicles, Boats and Yachts :
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Renogy 480-Watt 12-Volt 40 Amp DC to DC On-Board Solar Battery Charger RNG-DCC1212-40 - The Home Depot
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