The converters provide 35 Amp DC output, and a highly reliable nominal 13.6 Volt DC with or without a battery. No extra filtering is required. WFCO’s three-stage battery charging results in longer battery life and is totally automatic. Nominal voltage output modes are a 13.2 Volt DC range “float” mode, 13.6 Volt DC range “absorption” charge mode, and a 14.4 Volt DC range “bulk” charge mode. Short-circuit and reverse polarity protection provide you with further reliability and peace of mind. The cooling fan for the WF-8735 operates only when needed and ensures quiet operation. Front-cooled fan installation does not create additional installation space requirements. Every model is designed to comply FCC Class B, which means that the converters do not cause interference with televisions, radios or other signals. The model also brings you the convenience of built-in AC or DC distribution. 30 Amp main AC breaker and a total of up to five 20 Amp branch AC circuits can be installed. Six DC branch circuits include LED bulbs that illuminate to indicate open circuits.