CONVERTERS: WF-8900-AD-MBA Main Board Assembly Series

Product Description

WF-8900-AD-MBA Main Board Assembly Series

Our WF-8900-AD-MBA Main Board Assembly Series is a quick, easy replacement part for all power centers that now includes an industry-first, Auto-Detect technology. This new microprocessor-driven technology will recognize Lithium-Ion and lead-acid battery chemistries and automatically adjust the charging profile to match the battery type. No more buttons. No more switches. An accurately charged battery gives RV owners peace of mind. Eliminating the risk of over and under-charging the WF-8900-AD-MBA Main Board Assembly Series will maximize your battery life with multi-stage charging and current monitoring in both lead-acid and lithium-ion profiles. 

It installs easily with only two screws, three ac, and two dc wires. With no need to re-wire, installation is only 10 minutes! No additional wiring or hookup is required, and it accepts hi-pot testing. Customers also have the option for Reverse Polarity Detection that meets new RVIA & NEC requirements with audible alarm notification. 

To learn more about our products through video, click here. For any WFCO resources, tools, and information on our products, email with your request, or click here to download the WFCO Product Catalog.

Additional Information









Max. Input Current @15VAC

WF-8935-AD-MBA – 7A
WF-8945-AD-MBA – 9A
WF-8955-AD-MBA – 11A
WF-8965-AD-MBA – 13A
WF-8975-AD-MBA – 15A

Max. Power

WF-8935-AD-MBA – 600 watt
WF-8945-AD-MBA – 770 watt
WF-8955-AD-MBA – 940 watt
WF-8965-AD-MBA – 1110 watt
WF-8975-AD-MBA – 1280 watt

Continuous Power

WF-8935-AD-MBA – 475 watt
WF-8945-AD-MBA – 610 watt
WF-8955-AD-MBA – 750 watt
WF-8965-AD-MBA – 880 watt
WF-8975-AD-MBA – 1020 watt

Rated DC Output Voltage


Rated DC Current

WF-8935-AD-MBA – 35A
WF-8945-AD-MBA – 45A
WF-8955-AD-MBA – 55A
WF-8965-AD-MBA – 65A
WF-8975-AD-MBA – 75A

Charging Control

Automatically controlled by microprocessor

Charging Modes

3-Stage intelligent charge/2 stage intelligent charge

Intelligent Charge Mode

Absorption, Bulk and Float (Storage)/Absorption and Bulk

Battery Adaptability

LA/AGM/Lithium ion

Bulk Charge Voltage (4 Hours)


Absorption Charge Voltage


Float Charge Voltage



+/-1% accuracy against input or load changes

Cooling Fan

Speed according to the DC load amperage

VA Efficiency

>80% (under 70% of load condition)


Current-limiting and shut down; auto recovery upon return normal load

Short Circuit

Shut own and auto recovery upon return to normal


Shut down and auto recovery up return to normal

Battery Reverse Polarity

Protected by fuse; same rated fuse replacement required

Dimensions W x H x D

WF-8935-AD-MBA – 7.1 x 3.9 x 9.6 inch/181 x 99 x 243
WF-8945-AD-MBA – 7.1 x 3.9 x 9.6 inch/181 x 99 x 243 mm
WF-8955-AD-MBA – 7.1 x 3.9 x 9.6 inch/181 x 99 x 243 mm
WF-8965-AD-MBA – 7.8 x 4.5 x 10.8 inch/198 x 113 x 273 mm
WF-8975-AD-MBA – 7.8 x 4.5 x 10.8 inch/198 x 113 x 273 mm


WF-8935-AD-MBA – 2.5 lbs./1.14 kg
WF-8945-AD-MBA – 3.46 lbs./1.57 kg
WF-8955-AD-MBA – 3.46 lbs./1.57 kg
WF-8965-AD-MBA – 5.26 lbs./2.39 kg
WF-8975-AD-MBA – 5.26 lbs./2.39 kg


20-90% non-condensing


UL458 and FCC Class B Compliant

Voltage Output

Lead Acid – 13.2 – 14.4V DC Range, Lithium-Ion – 13.2 – 14.6 VDC, 13.6 – 14.6 VDC