An inverter converts 12V DC power from your batteries into 120V AC, which is what lets you run household outlets and appliances without shore power or a generator running. It works in the opposite direction to a converter, so the two are not interchangeable despite the similar names.
Pure sine wave inverters produce clean AC that matches shore power, which matters for CPAP machines, variable-speed motors, and modern electronics. Modified sine wave units cost less but can cause buzzing or reduced efficiency in sensitive devices. Options here run from 1,000 to 2,000 watts across WFCO and Marinco, alongside the Xantrex Freedom 458 inverter/charger.
Total the wattage of everything you plan to run at once, then add around 20% for startup surge before choosing a size.
