![]() ![]() An accurately charged battery gives RV owners peace of mind. This new microprocessor-driven technology will recognize lithium-ion and lead-acid battery chemistries and adjust the charging profile to match the battery type. This is accomplished by reducing (from bulk mode) the output voltage to 13.6VDC and remaining at this voltage until the power is cycled to the converter.The WF-9855-AD Deck Mount Converter Charger now includes an industry-first, Patent Pending Auto-Detect technology. This purpose is to provide a safe operating voltage for all loads in the RV. This mode is designed with 1 purpose in mind. If the total amperage draw from the converter reaches a preset point (within the 1-4 hour timer), the converter is designed to drop out of bulk mode. If your application requires longer than 4 hours (such as a larger battery bank > 200 Ahr), a simple cycling of power will reset the timers.Īs the energy is restored into the battery, the DC system voltage will climb and the current from the converter will decrease. For an empty battery, the bulk stage has a maximum time requirement of 4 hours. For a full battery, the bulk stage has a minimum time requirement of 1 hour, which allows the lithium cells inside the battery the time required to “balance”. The bulk mode stage could last anywhere from 1 to 4 hours based on the battery and load current which is being used. Maximum current to flow as required by the loads. This is accomplished by boosting the output voltage to 14.6VDC and allowing the Second, to ensure the lithium cells inside the battery remain balanced. First, to quickly restore the energy back into the battery. This mode is designed with 2 purposes in mind. 4 hours genny time for 200 Ah when sun is just -offs. Oh, so if bulking > 200 Ah, this may not be the charger for you.good lord, thanks to you guys for getting me to read the dang manual! (Wonder what 13.6V is as % on Li cells? I'm very new to this.) Well, fudge.since I only have a 24' trailer, this sounded like an awesome way to save space! All these inverter/chargers are huge - well, for a regular trailer with little storage space.none of which would give Victron MultiPlus' desired 4" all-around spacing. ![]() A whole lot more to rewire, tho.Ĭharge profile is 50A at 14.6V for 1-4 hours then 13.6 for forever ( per their manual here and copied below). This is 8950-MBA and mine is an 8950-PEC model - not sure yet if that matters.Ī whole WFCO Li replacement center is $217 and has a switch for Li or lead acid. ![]() Just learned about WFCO Li replacement converters. What are the options to charge with this converter? Can I just attach a DC-DC charger to feed a voltage that the lithium batteries like, or will the microprocessor in the converter reject that? Are newer lithium cells able to charge at 14.4v? Ideally, I would use a converter with a lithium charge profile, but if could be months after I purchase the batteries that I can afford the charger (which is why I initially planned to but it the other way around). As I understand 14.4v will damage a 12v lithium battery pack. I am concerned mostly about the bulk charge. In the manual I don't see any way to change that. The charger on board is a WFCO WF-9855 55 amp charger ( ), the web page says it bulks at 14.4v, absorbs at 13.6 and floats at 13.2. My plan was to install an inverter/charger next, but I am beginning to think that the battery situation is more pressing. My dual RV/Marine 12v batteries can only provide about 41ah of power. With the installation of the the Victron Smartshunt, I discovered that I can run my furnace in my RV for less than 4 hours.
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