The Progressive Dynamics INTELI-POWER converters are UL listed for the US and Canada. They provide safe, reliable, filtered DC power to all Recreational Vehicle 12-Volt lighting and appliance circuits. The Inteli-Power converter also safely recharges and maintains the RV battery and has a two-year limited warranty. The built in Total Charge Management System (TCMS) connector allows the RV manufacturer, dealer, or customer to easily add the optional Charge Wizard. The Charge Wizard is a microprocessor-controller that constantly monitors the RV battery voltage to determine if the battery requires a quick recharge, is fully charged and being used, or is fully charged and is in storage. The Charge Wizard then selects one of three charging voltages: 14.4, 13.6, or 13.2; and one of four operating modes (Boost, Normal, Storage or Desulfation) to properly re-charge or maintain the battery.