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Your cart is empty. This WF-8955-MBA power converter is Fit for WF8955PEC , WF-8955, WF-8955-MBA, WF-8955-AD-MBA, WF-8955AN, WF-8900, WF-8900-AD, WF-8955PEC Series Power Converter, Parallax 7145 and 7155 Power Center.
PRODUCT FEATURES-AUTO DETECT
This product includes the exclusive "Auto-detect" feature for the charging of batteries. With this new technology, the power converter will evaluate the charging cycle of a battery, determine the type of battery being used, and then choose the appropriate charging program(profile) to provide for the best performance and maintenance of that battery.
Because of the differences of Lead Acid, AGM and Lithium type batteries, a system that provides a charge to the battery or batteries must be able to accommodate the different charging requirements.
PRODUCT FEATURES-Two kinds of Charging Systems
With the use of the "Auto-detect" product, the charging requirement is able to be "detected" and is then automatically set for the type of battery being used. For standard Lead Acid and AGM batteries, the power converters still use the Three-Stage Smart Charging to effectively maximize battery life by monitoring through the different phases of the charge cycle On the other hand, Lithium batteries will prefer the use of only two stages when charging, and therefore the power converter will charge using the WF-8900 Two-Stage Smart Charging system.
PRODUCT FEATURES-AUTOMATIC COOLING FAN
The cooling fan in the product Series Power Center is incremental and is controlled by the current drawn out of the converter to the applied load. The on-board microprocessor increases fan speed as the total load increases and decreases fan speed as the load decreases. Unlike traditional temperature controlled fans, the load-controlled fan provides better component cooling by avoiding temperature spikes which can lead to premature component failure.
PRODUCT FEATURES-AUTOMATIC COOLING FAN
The cooling fan in the product Series Power Center is incremental and is controlled by the current drawn out of the converter to the applied load. The on-board microprocessor increases fan speed as the total load increases and decreases fan speed as the load decreases. Unlike traditional temperature controlled fans, the load-controlled fan provides better component cooling by avoiding temperature spikes which can lead to premature component failure.
Steve H.
Reviewed in the United States on March 21, 2025
This is a replacement converter/charger for your RV. It is not a standalone "Deck Mount" version, but it is an MBA version that is made to do inside your power distribution box. It goes in the bottom section of your box with the AC breakers and 12V fuses.This takes a pretty good knowledge of electrical and if you are not comfortable with that, you really should hire a pro. This has both 12oVAC and 12VDC running through at full capacity for the RV. There is a chance to seriously damage yourself and your RV.Anyway, this particular converter is made to fit perfectly in the WFCO 89xx series power distribution center. I happen to have one of these PDCs that I am installing soon in my cargo trailer, so I added pics to show where it goes and what the connections are like.In reality, it is pretty simple. Take the cover off the PDC (after cutting off all power and disconnecting all batteries). That should be two screws at the top behind the door. Then, once the cover is off, there are just two screws holding the base of the converter. Take those out, then the unit will slide out of the bottom of the case. There are three AC wires to disconnect. The green ground and white neutral go to their respective bus bars. Then, the black wire goes to the breaker for the controller. It is "usually" the second from the top, just below the Main, but follow the wire to the sure.Then, the two large wires (Red/White) are the DC output, they go up the right side of the case to the board that has all the 12V fuses. The wrap behind and mount to the upper left of that board, so they can be a little tricky. You may have to take other things loose to get them in, but work slow and take pictures to remember where to put things back. But those 5 wires are all you have to connect. Make sure to get everything tight again (and check all the screws in the box while you are there. If you see any white insulation that is discolored near a screw, that is a big indicator the screw is loose and the connection is getting hot. It almost always shows on the neutral, which is the white wires. But check all the breakers, all the 12V side and make sure they are all tight, then button everything back up before applying power.This particular unit is a 55A converter. It will make all the DC for the whole RV, both for the lights, appliances, etc. and for charging the batteries. This version is the newer AD version, which means auto-detect. It is able to detect if you have Lead-Acid (LA) or Lithium batteries (LifePO4 or Li-ion). It will adjust the charging profile for the type battery you have. It does Bulk for early quick charging (constant Amps), then Absorption to slowly complete the charge to 100% (constant Volts), then Float mode to trickle charge the battery to maintain the full-charge. It takes care of this all automatically by sensing the current voltage of the LA battery. The difference for a Lithium battery is two things. First, the Lithium battery has a higher resting voltage than a LA battery (about 13.6V compared to about 12.6V), so it needs a higher charging voltage. Second, the Lithium battery does self-discharge like the LA battery, so it doesn't require a Float stage to trickle charge to keep it topped off. These new converter/charges adjust for all of these factors on their own.The original OEM converter is typically about twice the price of the aftermarket brands. For me, for my own equipment, it is worth the value. I can change one of these in about 30 minutes (I am a Certified RV Tech), so if I have to change it again due a premature failure, I am not worried about eating the labor. I will often choose an aftermarket part when the difference in price is this large. But, YMMV and we all have to determine what our own tolerance for risk is in each situation.
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