AUTO-DETECT: WF-8900-AD SeriesThe WF-8900-AD Series Power Centers will charge the 12-volt House battery if installed. A battery DOES NOT have to be installed for
WF-8900-AD Series Power Center converter operation. When a battery is installed, two reverse polarity fuses protect the converter circuitry. The fuses are located along the left-center edge of the DC fuse board below the VCC+ lug. This feature prevents permanent damage to the converter from a battery connected into the circuit backwards. In addition to protecting the converter section, the reverse polarity fuses are the main connection between the converter and the DC fuse board.