Compact inverter/chargers to power the comforts of home on your boat, RV or truck. With modified sine wave output, Freedom HF 1000 and 1800 Inverter/Chargers are designed to run entertainment systems and small appliances in smaller boats, RVs and trucks. Both Freedom HF models are designed for demanding marine and RV conditions. Temperature-controlled multistage charging ensures that your batteries are recharged safely and efficiently. Both models include an automatic transfer switch and a detachable digital remote control panel display that provides precise system information and can be mounted wherever you require the information. 1/box.