The WF-9800 Series converter/chargers are versatile, advanced power source solutions. Thsee models provide amps of clean, reliable DC power, which is ideal 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 WFCO converters, which means that the converter does not 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.