{"product_id":"victron-autotransformer-120-240vac-50a","title":"Victron Autotransformer 120\/240VAC-  50A","description":"\u003ch2\u003eVictron Autotransformer 120\/240V 50A: High-Capacity Voltage Conversion and Split-Phase Load Balancing\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eVictron Autotransformer 120\/240V 50A\u003c\/strong\u003e is a high-capacity solution for systems requiring voltage step-up, voltage step-down or split-phase load balancing. Designed for specialist mobile, marine and off-grid power systems, it helps adapt AC power from a generator, shore power connection, inverter or stacked inverter system to suit your installation.\u003c\/p\u003e\n\n\u003cp\u003eWith a toroidal transformer and up to 50A feed-through capacity, it can convert between 120V and 240V AC configurations while helping maximise the usable power available from a 120\/240V split-phase supply with uneven 120V loads.\u003c\/p\u003e\n\n\u003ch3\u003eMaximise Split-Phase Power with Load Balancing\u003c\/h3\u003e\n\n\u003cp\u003eIn a 120\/240V split-phase system, 120V loads are rarely distributed evenly across both legs. A large load on one leg can cause it to reach its current limit while the other leg still has unused capacity. This can restrict the total power available from your generator, grid supply or inverter system.\u003c\/p\u003e\n\n\u003cp\u003eThe Victron Autotransformer creates a new neutral point, allowing load imbalance to be absorbed by the transformer. This helps transfer available energy between the two 120V legs, allowing greater use of the full capacity of the split-phase supply.\u003c\/p\u003e\n\n\u003cp\u003eThe 50A model supports up to \u003cstrong\u003e55A of neutral current for 30 minutes\u003c\/strong\u003e and \u003cstrong\u003e45A continuously at 40°C\u003c\/strong\u003e, making it ideal for larger systems where significant 120V load imbalance is expected.\u003c\/p\u003e\n\n\u003ch3\u003eStep Up or Step Down AC Voltage\u003c\/h3\u003e\n\n\u003cp\u003eThe Autotransformer can also be configured to increase or decrease AC voltage according to the requirements of the installation. It can step a 120V AC source up to 120\/240V split-phase output, or step down a 120\/240V supply for use with compatible 120V equipment and inverter systems.\u003c\/p\u003e\n\n\u003cp\u003eThis makes it a practical choice for generators, shore power connections, air-conditioning systems, water pumps and other AC loads where the available supply voltage does not match the required system configuration.\u003c\/p\u003e\n\n\u003ch3\u003eA Flexible Alternative to Stacked Inverters\u003c\/h3\u003e\n\n\u003cp\u003eWhere 120\/240V split-phase output is required, a single 120V inverter paired with an Autotransformer can be an effective alternative to using two stacked 120V inverters. The Autotransformer creates the required split-phase output while allowing available power to be shared more effectively between the two 120V legs when loads are uneven.\u003c\/p\u003e\n\n\u003ch3\u003eIntegrated Ground Relay for Victron Inverter\/Chargers\u003c\/h3\u003e\n\n\u003cp\u003eThe Autotransformer includes an integrated ground relay for compatible Victron MultiPlus and Quattro inverter\/charger installations. When correctly configured and connected, it creates the required neutral-to-earth bond to support the correct operation of GFCI and RCD protection devices.\u003c\/p\u003e\n\n\u003cp\u003eThe relay is controlled by the inverter\/charger via its ground relay terminals. Installation and configuration must be completed by a qualified electrician in accordance with the Victron wiring diagrams and applicable electrical standards.\u003c\/p\u003e\n\n\u003ch3\u003eThermal and Overcurrent Protection\u003c\/h3\u003e\n\n\u003cp\u003eBuilt-in protection helps safeguard the Autotransformer during demanding operation. When the transformer becomes warm, the cooling fan operates and the red temperature LED illuminates. In the event of overheating or overcurrent, the integrated two-pole circuit breaker disconnects the unit. Once the cause has been addressed, the breaker can be manually reset.\u003c\/p\u003e\n\n\u003ch3\u003eRobust Indoor Installation Design\u003c\/h3\u003e\n\n\u003cp\u003eThe Autotransformer is housed in a durable aluminium enclosure with an IP21 protection rating, integrated wall-mounting points and screw terminals suitable for cables up to 35 mm² \/ AWG 2. It is intended for indoor or protected compartment installation and requires sufficient ventilation around the enclosure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e This is an autotransformer and does not provide galvanic isolation.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-capacity AC conversion:\u003c\/strong\u003e Supports 120V to 240V step-up and 240V to 120V step-down configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e50A feed-through current:\u003c\/strong\u003e Suitable for higher-capacity 120\/240V AC systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSplit-phase balancing:\u003c\/strong\u003e Helps transfer available capacity between uneven 120V loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh neutral-current capability:\u003c\/strong\u003e 55A for 30 minutes and 45A continuous at 40°C.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated ground relay:\u003c\/strong\u003e Designed for compatible Victron MultiPlus and Quattro inverter\/charger systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal protection:\u003c\/strong\u003e Cooling fan, temperature indication and automatic disconnect protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOvercurrent protection:\u003c\/strong\u003e Integrated two-pole circuit breaker for protection and manual reset.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable construction:\u003c\/strong\u003e Toroidal transformer in an aluminium IP21 enclosure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5-year warranty:\u003c\/strong\u003e Backed by Victron Energy’s limited 5-year warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput\/output voltage:\u003c\/strong\u003e 120 \/ 240V AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 50\/60Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput circuit breaker:\u003c\/strong\u003e 50A, two-pole\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum 240V feed-through current:\u003c\/strong\u003e 50A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeutral current:\u003c\/strong\u003e 55A for 30 minutes at 40°C; 45A continuous at 40°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransformer type:\u003c\/strong\u003e Toroidal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrical terminals:\u003c\/strong\u003e Screw terminals, up to 35 mm² \/ AWG 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtection rating:\u003c\/strong\u003e IP21\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 460 x 214 x 110 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 12.5 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMake Better Use of Your Available AC Power\u003c\/h3\u003e\n\n\u003cp\u003eFor larger compatible 120\/240V power systems, the Victron Autotransformer 50A provides a practical way to adapt AC voltage, manage uneven split-phase loads and improve the use of available generator or inverter capacity. It is ideal where system flexibility, safe neutral grounding and high-capacity load balancing are required.\u003c\/p\u003e","brand":"Victron","offers":[{"title":"Default Title","offer_id":42037210677309,"sku":"VIC-ITR000100052","price":649.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/victron-autotransformer-120-240v-50a-vic-itr000100052.webp?v=1789606380","url":"https:\/\/www.solar4rvs.com.au\/products\/victron-autotransformer-120-240vac-50a","provider":"Solar 4 RVs","version":"1.0","type":"link"}