Check the listing for details. 55Amp RV Converter Power Supply Battery Charger Replace for WFCO WF9855. Condition: New. Listed at 129.00 USD. Converters 120VAC shore power into usable 12VDC powerCapable of charging your RV's battery while also powering low voltage lights and appliancesAvailable in several capacities: 35-amp, 45-amp, 55-amp, 60-amp, 75-amp, and 100-amp.Works with both lead batteries and lithium batteriesRVs use a lot of power and with all of our devices and added appliances, this power load increases. But you can't just use the power straight out of the shore power outlet for many of these electrical devices. RVs use two power systems, 12V DC power and 110V AC power. Converters are used to change the 110V AC power from the shore power to 12V DC power for your RV appliance and items such as lights, fans, vents, and more. The converter also works to recharge your batteries when you are hooked up to shore power, which means your batteries won't drain, further extending their lifespan. And since having access to battery power is so important for RV life, having a converter to charge the battery is equally important.DC output voltage (no load) approx.: 14.6/13.6/13.2VFan control: proportionalDimensions: 7.8 x 9.5 x 3.5Weight: 8 poundsCharges battery or powers 12V equipmentExact replacement for WF-9800"Switch mode" type: 3-stage charging and fixed single output modes seriesTemperature controlled quiet internally mounted fan coolingReverse polarity, overload, and thermal protectionWorks with both lead batteries and lithium batteriesIncludes LED indicator lightCan also be wired in series or parallel to reach even higher power outputs