This is the WF-9800 Series WF-9845-AD-CB auto detect deckmount converter/charger, it is a versatile, advanced power source solution. The WF-9845 model provides 45 Amps of clean, reliable DC power, which is perfect for powering electronics and appliances. The 9800 Series provides clean power, even without filtering from a battery. Quiet operation is assured as the cooling fan runs only when needed. Another advantage is FCC Class B compliance for the WF-9845 model, which means that the converter is designed not to cause interference with televisions, radios, or other signals. Automatic three-stage battery charging maintains your battery's life with three nominal voltage output modes: 13.2 VDC “float” mode, 13.6 VDC “absorption” mode, and a 14.4 VDC “bulk” charge mode. Electronic current limiting automatically shuts down the power during overload or short-circuit conditions.