Freedom 458 Inverter/Charger. AC Power Inverter with High Surge Capability, 3-Stage Charger. With filtered modified sine wave output, Freedom inverter/chargers run virtually anything, from electrical equipment to appliances and electronics in your RV. Temperature controlled multistage charging ensures that your batteries are recharged quickly, and automatic shutdown and other safety features protect your expensive deep-cycle batteries from excessive depletion.. For inverter/charger control and b