{"product_id":"qbp510841","title":"Victron Energy MultiPlus Inverter\/Charger, 3000VA, 120V AC, VE.Bus, 50A Transfer Switch","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe Victron Energy MultiPlus is a 120 VAC inverter\/charger for boat AC power systems that combines a 3000 VA true sine wave inverter, adaptive battery charging, and a 50 A transfer switch in one unit. It is built for installations where shore power, generator power, and battery power all need to work together without adding separate inverter and charger hardware.\u003c\/p\u003e\u003cp\u003eThis MultiPlus range covers both 12 V and 24 V house-bank systems. The 12 V versions use a 120 A charger, while the 24 V versions use a 70 A charger. In inverter mode, the unit supplies 120 VAC at 60 Hz, with 2400 W continuous output at 25°C and 6000 W peak power.\u003c\/p\u003e\u003cp\u003eOn board, it is useful for running AC loads from the battery bank, recharging batteries from shore power or a generator, and keeping selected AC circuits powered when the external AC source drops away. The 50 A transfer switch helps simplify dockside and generator integration, while PowerControl and PowerAssist help manage limited shore or generator capacity.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003eCombines a 3000 VA true sine wave inverter, battery charger, and 50 A AC transfer switch in one enclosure.\u003c\/li\u003e\n\u003cli\u003eSupports 120 VAC output at 60 Hz for common North American marine AC loads.\u003c\/li\u003e\n\u003cli\u003eAvailable for 12 V battery systems with 120 A charging or 24 V battery systems with 70 A charging.\u003c\/li\u003e\n\u003cli\u003ePowerControl helps prevent overload when shore power or generator capacity is limited.\u003c\/li\u003e\n\u003cli\u003ePowerAssist can supplement shore or generator input with battery power during short periods of higher demand.\u003c\/li\u003e\n\u003cli\u003eTransfer switching takes place in less than 20 milliseconds, helping many connected AC loads continue running during source changes.\u003c\/li\u003e\n\u003cli\u003eVE.Bus communication supports system configuration, parallel operation, three-phase operation, remote monitoring, and integration with compatible Victron equipment.\u003c\/li\u003e\n\u003cli\u003eSecond AC output is available for loads that should only run when shore power or generator power is present.\u003c\/li\u003e\n\u003cli\u003eAluminum enclosure with IP21 protection for dry, ventilated electrical spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eVariants\u003c\/h6\u003e\u003cp\u003eThis MultiPlus inverter\/charger is offered in four configurations for different battery-system voltages, charging amperage requirements, and UL approval needs.\u003c\/p\u003e\u003cp\u003eThe main differences are DC system voltage, charger output, and UL approval status. Across these configurations, the product family keeps the 3000 VA inverter rating, 120 VAC output, 50 A transfer switch, true sine wave output, PowerControl, PowerAssist, and VE.Bus communication.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePMP123021102: 120 A charger, 12 V DC battery system, UL Approved No. This configuration fits 12 V house-bank installations where higher charge current is needed from shore power or a generator.\u003c\/li\u003e\n\u003cli\u003ePMP243021102: 70 A charger, 24 V DC battery system, UL Approved No. This configuration fits 24 V house-bank installations where lower DC current is preferred for the same inverter class.\u003c\/li\u003e\n\u003cli\u003ePMP122301102: 120 A charger, 12 V DC battery system, UL Approved Yes. The UL approval is relevant for installations where listed equipment is required by the project, survey, or electrical plan.\u003c\/li\u003e\n\u003cli\u003ePMP242301102: 70 A charger, 24 V DC battery system, UL Approved Yes. This version pairs the 24 V battery-system format with UL-approved compliance for installations that require it.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eInstallation and setup\u003c\/h6\u003e\u003cp\u003ePlan the installation in a dry, ventilated electrical space with enough access for cable routing, service checks, and airflow. The unit should not be mounted in a wet or dusty location, which matters on boats where lockers, engine rooms, and lazarettes can see moisture, heat, and salt air.\u003c\/p\u003e\u003cp\u003eBattery-bank sizing, DC fuse selection, and cable length all affect whether the unit can deliver its rated output. For full-capacity installations, the 12 V versions call for a 400 to 1200 Ah battery bank and a 400 A DC fuse, while the 24 V versions call for a 200 to 700 Ah battery bank and a 300 A DC fuse. Final wiring and protection should be matched to the vessel layout and applicable marine electrical standards.\u003c\/p\u003e\u003ch6\u003eElectrical and system integration\u003c\/h6\u003e\u003cp\u003eThe AC input range is 95 to 140 VAC at 45 to 65 Hz, which suits 120 V shore power or generator input when the vessel is wired and configured correctly. The inverter output is 120 VAC with a frequency of 60 Hz, so it can support typical onboard AC circuits within the rated capacity of the selected installation.\u003c\/p\u003e\u003cp\u003eThe VE.Bus port is useful when the MultiPlus is part of a larger Victron power system. With compatible Victron interfaces and monitoring equipment, it can be configured, monitored, and integrated with battery monitors, GX devices, and other system controls.\u003c\/p\u003e\u003ch6\u003eUse cases on board\u003c\/h6\u003e\u003cp\u003eThis MultiPlus range is a good match for cruising boats, sportfishing boats, and workboats that move between dock power, generator use, and battery-powered AC loads. It is especially practical where the owner wants one inverter\/charger platform to handle battery charging, AC source transfer, and shore or generator current management.\u003c\/p\u003e\u003cp\u003eThe 12 V versions make sense on vessels already built around a 12 V house bank, while the 24 V versions suit boats with higher-voltage DC systems and longer cable runs where reducing DC current can help with installation planning.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"120A \/ 12V \/ No","offer_id":52023114399925,"sku":"QBP510841-V1","price":1168.75,"currency_code":"USD","in_stock":false},{"title":"70A \/ 24V \/ No","offer_id":52023114432693,"sku":"QBP510841-V2","price":1168.75,"currency_code":"USD","in_stock":false},{"title":"120A \/ 12V \/ Yes","offer_id":52023114465461,"sku":"QBP510841-V6","price":1168.75,"currency_code":"USD","in_stock":true},{"title":"70A \/ 24V \/ Yes","offer_id":52023114498229,"sku":"QBP510841-V4","price":1184.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/1335806_qbp510841.jpg?v=1780191727","url":"https:\/\/www.qualityboatparts.com\/products\/qbp510841","provider":"Quality Boat Parts","version":"1.0","type":"link"}