The converters provide 12 Ampere 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 provides you with further reliability and peace of mind. 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 Amp main AC breaker and a total of up to three 20 Amp branch AC circuits can be installed. DC circuits include LED lights that illuminate to indicate open circuits.