This converters provide 25 Ampere DC output and a highly reliable nominal 13.6 VDC with or without a battery. No extra filtering is required. Three stage battery charging results in longer battery life and is totally automatic. Nominal voltage output modes are a 13.2 VDC range “float” mode, 13.6 VDC range “absorption” charge mode and a 14.4 VDC range “bulk” charge mode. Short circuit and reverse polarity protection provide you with further reliability and peace of mind. The cooling fan operates only when needed and ensures quiet operation. Every model is designed to comply with FCC Class B, which means that the converters do not cause interference with televisions, radios, or other signals. The 8700 series also brings you the convenience of built-in AC and DC distribution. 30 Ampere main AC breaker and a total of up to three 20 Ampere branch AC circuits can be installed. Four DC circuits include LED lights that illuminate to indicate open circuits.