Its a converter charger from AC to DC used for travel trailers.
8955-ad-mba 8900-ad 9855 converter rv power converter rv converter 55 amp converter
Input Voltage: 105-130 VAC/60 Hz Output Current: 55AMP
Output Voltage: 13. 5 VDC (normal) / 13. 1 VDC (trickle charge) / 14. 4 VDC (bulk charge)
Main board assembly replaces the lower power converter section on your built-in converter including the Parallax 7145 and 7155 power center.
It is a simple replacement part installing easily with only 4 screws and 5 wires. For any WF-8955 or Parallax 7155 converter.