Parallax Power Supply&nbsp; Parallax Power Components 8345 Converter/Charger Shore Service with three current stage converter/charger Manufactured to operate on 120VAC 15 Amp branch circuits leaving plenty of power for running other 120VAC devices Durable steel enclosure and has an 11 position fuse block with blown fuse indicators Upgradeable to TempAssure technology by installing the Parallax 4400TAU module 30 Amp Shore Service; 45 Amp Converter/Charger