{"product_id":"victron-autotransformer-120-240v-100a","title":"Victron Autotransformer 120\/240V-100A - ITR000100101","description":"\u003ch1 style=\"color: #f87c24;\"\u003eVictron Energy Autotransformer 120\/240V 100A — ITR000100101\u003c\/h1\u003e\n\n\u003cp\u003eThe Victron Energy Autotransformer 120\/240V 100A is a split-phase voltage conversion unit designed for off-grid and marine systems that require both 120V and 240V AC outputs from a single-phase source. It is suited to professional installers working on North American split-phase systems, RV installations, and vessels where dual-voltage distribution is required.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eConverts between 120V and 240V split-phase AC, allowing a single inverter to supply both voltage levels simultaneously.\u003c\/li\u003e\n  \u003cli\u003eRated at 100A continuous current, supporting high-load applications across both output legs.\u003c\/li\u003e\n  \u003cli\u003ePassive autotransformer design with no active electronics, resulting in low losses and high thermal reliability.\u003c\/li\u003e\n  \u003cli\u003eCompact and robust enclosure with a unit weight of 12.4 kg, suitable for fixed installation in marine, vehicle or off-grid cabinet builds.\u003c\/li\u003e\n  \u003cli\u003eCompatible with Victron Quattro and MultiPlus inverter\/chargers operating on 120V or 240V single-phase AC output.\u003c\/li\u003e\n  \u003cli\u003eBalances unequal loads across the two 120V legs, reducing neutral current and protecting connected equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eAn autotransformer differs from an isolation transformer in that it shares a common winding between primary and secondary, making it more compact and efficient for voltage splitting rather than galvanic isolation. In a North American split-phase system, 240V is derived from two 120V legs that are 180 degrees out of phase. The Victron Autotransformer takes a 240V input and provides two balanced 120V legs, or takes a 120V input and steps up to 240V, depending on how it is wired. This makes it a practical solution when a Quattro or MultiPlus inverter outputs only one voltage level but the installation requires both.\u003c\/p\u003e\n\n\u003cp\u003eThe 100A rating refers to the current capacity on the 120V side. Load balancing is an important function of this unit: when loads on the two 120V legs are unequal, the autotransformer actively balances the current drawn from the inverter, preventing one leg from being overloaded. This is particularly relevant in RV and marine installations where 120V and 240V appliances run simultaneously. The passive winding design means there are no fans, no control boards and no firmware to manage, keeping maintenance requirements low.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"border: 2px solid #f87c24; border-collapse: collapse; width: 100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f87c24; color: #ffffff;\"\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eSKU\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eITR000100101\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eVoltage\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e120\/240V AC split-phase\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eCurrent Rating\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e100A\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eWeight\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e12.4 kg\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eGTIN\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e8719076022428\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eNorth American split-phase off-grid systems using Victron Quattro or MultiPlus inverter\/chargers.\u003c\/li\u003e\n  \u003cli\u003eMarine and yacht installations requiring both 120V and 240V AC distribution from a single inverter output.\u003c\/li\u003e\n  \u003cli\u003eRV and motorhome builds where shore power or inverter output must supply mixed 120V\/240V loads.\u003c\/li\u003e\n  \u003cli\u003eRemote cabins and off-grid properties wired to North American electrical standards.\u003c\/li\u003e\n  \u003cli\u003eLoad balancing between two 120V legs in any split-phase AC distribution board.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eWhat Is Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Victron Energy Autotransformer 120\/240V 100A (ITR000100101)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eThis autotransformer handles mains-level AC voltages up to 240V at currents up to 100A. Installation must be carried out by a qualified electrician familiar with split-phase AC wiring. Correct neutral and earth bonding is critical to safe operation. Ensure the unit is mounted in a ventilated enclosure and that all cable terminations are rated for the connected load. This product is intended for use in off-grid, marine and vehicle systems and is not designed for connection to the UK public grid. G98 or G99 grid connection requirements do not apply to this product.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":47480981815630,"sku":"ITR000100101","price":416.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/3698\/8238\/files\/victron-autotransformer-120240v-100a-itr000100101-370592.jpg?v=1747940332","url":"https:\/\/voltaconsolar.com\/products\/victron-autotransformer-120-240v-100a","provider":"VoltaconSolar","version":"1.0","type":"link"}