The Parallax Power Supply 4400 series converters utilize technology developed for power supplies in computers that provides a clean, stable, voltage regulated output while also providing safety features designed to help protect the converter against over-temperature and output over-load and is maintenance free.

The 4400 series power converter has been tested for the utmost safety and is specifically listed for use in the RV. The DC output is over-current protected and ”reversed battery polarity” protection is also provided.

If the 4400 series power converter is not working, first confirm the RV supply or “shoreline” cord is plugged into a live circuit. Then check all the 120-volt breakers in your RV distribution panel to make sure they are “on”. If a breaker is tripped, follow the instructions to reset the breaker. If the breaker trips again, consult an electrician or certified RV technician.

If any 12-volt appliance fails to operate, first locate your RV’s 12-volt distribution fuse block and inspect all fuses. If a fuse is open or “blown” replace it with the same size fuse (never install a larger fuse). If the fuse opens again, have an electrician or certified RV technician locate the circuit trouble.

The addition of the (optional) TempAssure module (Patent US 7,245,109 B2) and sensor cable employs technology that allows the output voltage of the converter to be varied by the temperature of the RV’s “house” battery. The benefit of this feature helps to provide a more appropriate charging voltage for the “house” battery exposed to varying ambient temperatures. For example, in cold climates the output voltage of the converter will be increased, which results in a more fully charged and maintained battery. In hot climates the output voltage of the converter will automatically be lowered, which will aid in reducing excessive out-gassing of the battery caused by the battery requiring a lower “float” voltage.