{"product_id":"qbp926489","title":"Victron Energy 4500W Auto 115\/230V Isolation Transformer, 120\/240V Output, IP21","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe Victron Energy ITR050452042 is a 4500W isolation transformer for boat shore power systems that need AC electrical isolation, galvanic corrosion protection, and automatic input voltage detection for 115V or 230V supplies. It accepts 115V or 230V AC input, outputs 120V or 240V AC depending on configuration, and runs at 50\/60Hz.\u003c\/p\u003e\u003cp\u003eBy separating the vessel AC system from the shore-side ground, this transformer helps reduce galvanic corrosion risk on underwater metal parts such as shafts, propellers, through-hulls, and fittings while still supporting safe onboard grounding practice. It is a practical fit for cruising boats, fishing boats, and larger vessels that connect to marina shore power for charging, appliances, heating, air conditioning, and dockside AC loads.\u003c\/p\u003e\u003cp\u003eThe unit has a 38A output current rating at 115V and 19A at 230V. It uses a toroidal transformer with a 1:1.05 ratio, soft start to limit inrush current, and an aluminium enclosure with IP21 protection, so it belongs in a dry, protected technical space rather than an exposed cockpit or deck locker.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003e4500W shore power isolation for vessel AC installations using 115V or 230V supply.\u003c\/li\u003e\n\u003cli\u003eAutomatic AC input voltage detection switches between 115V and 230V input ranges.\u003c\/li\u003e\n\u003cli\u003eConfigurable AC output supports 120V or 240V onboard AC layouts.\u003c\/li\u003e\n\u003cli\u003eHelps break electrical continuity between shore power and the boat to reduce galvanic corrosion risk.\u003c\/li\u003e\n\u003cli\u003eSoft start limits transformer inrush current, helping prevent nuisance tripping of shore power protection.\u003c\/li\u003e\n\u003cli\u003e38A output rating at 115V and 19A output rating at 230V for matching shore power capacity and onboard load planning.\u003c\/li\u003e\n\u003cli\u003eToroidal transformer construction keeps weight and operating noise lower than many conventional transformer layouts.\u003c\/li\u003e\n\u003cli\u003eAluminium blue RAL 5012 enclosure with IP21 protection for installation in a dry machinery space, electrical locker, or similar protected area.\u003c\/li\u003e\n\u003cli\u003eOperating temperature range is -20°C to 40°C with maximum 95% non-condensing humidity.\u003c\/li\u003e\n\u003cli\u003eEN 60076 safety standard, 21.8 kg weight, and 362 x 258 x 221 mm dimensions for layout and mounting checks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eInstallation and setup\u003c\/h6\u003e\u003cp\u003eThis transformer is installed between the shore power inlet and the vessel AC distribution system. Shore power connects to the AC input terminals, and the vessel AC loads connect to the AC output terminals. The enclosure ground is connected to the vessel grounding system, and the neutral-to-earth link on the output side is set as part of the installation so downstream GFCI protection can operate correctly.\u003c\/p\u003e\u003cp\u003eThe AC output voltage must be configured for 115V or 230V use with the included black jumper wires. Minimum cable cross-sections are 6 mm² or AWG 10 for 115V operation and 4 mm² or AWG 11 for 230V operation. AC shore power work should be handled by a qualified marine electrician because correct grounding, overcurrent protection, cable sizing, and fault protection are critical on board.\u003c\/p\u003e\u003ch6\u003eElectrical and system integration\u003c\/h6\u003e\u003cp\u003eThe transformer can be used in 115V to 120V, 230V to 240V, 115V to 240V, and 230V to 120V shore power arrangements. The 1:1.05 ratio raises the AC output slightly compared with the input, which should be considered when checking compatibility with onboard AC equipment and marina supply conditions.\u003c\/p\u003e\u003cp\u003eWhen the vessel is out of the water for maintenance or winter storage, the AC input earth and AC output earth can be linked inside the transformer with the included yellow and green jumper wire. This keeps the shore earth connection in place during on-land service conditions.\u003c\/p\u003e\u003ch6\u003eUse cases on board\u003c\/h6\u003e\u003cp\u003eThis isolation transformer is a strong match for boats that spend regular time connected to shore power and need a clean separation between marina AC supply and the vessel electrical system. It is especially useful where galvanic corrosion control matters, such as boats with exposed shafts, propellers, metal through-hulls, or mixed underwater metals.\u003c\/p\u003e\u003cp\u003eBecause the enclosure is IP21, the installation location should be sheltered from spray, bilge water, washdowns, and direct weather exposure. Plan for the 21.8 kg weight, airflow around the enclosure, and access to the terminals and jumper positions during installation and inspection.\u003c\/p\u003e\u003ch6\u003eWhat’s included\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003e1 isolation transformer\u003c\/li\u003e\n\u003cli\u003e1 hanging bracket for mounting inside a vessel\u003c\/li\u003e\n\u003cli\u003e1 long yellow and green jumper wire with female 6.35 mm spade connectors for linking AC input earth to AC output earth when the vessel is out of the water\u003c\/li\u003e\n\u003cli\u003e1 long yellow and green wire with eye terminals for case grounding\u003c\/li\u003e\n\u003cli\u003e1 short yellow and green jumper wire with female 6.35 mm spade connectors for the AC output neutral to earth link\u003c\/li\u003e\n\u003cli\u003e4 short black jumper wires with 6.35 mm female spade connectors for AC configuration\u003c\/li\u003e\n\u003cli\u003e7 mounting screws\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52715827036341,"sku":"QBP926489","price":597.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/1341136_qbp926489.webp?v=1781720195","url":"https:\/\/www.qualityboatparts.com\/products\/qbp926489","provider":"Quality Boat Parts","version":"1.0","type":"link"}