Victron MultiPlus-II 12/3000
The MultiPlus-II 12/3000 is the second-generation 12V/3000VA inverter/charger. Same core concept as the original MultiPlus (inverter + charger + transfer switch), with the platform updates the II brings: tighter PowerControl tuning, full ESS support for grid-tied storage applications, and updated comms that integrate cleanly with the current Cerbo GX firmware.
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About this item
The MultiPlus-II 12/3000 is the second-generation 12V/3000VA inverter/charger. Same core concept as the original MultiPlus (inverter + charger + transfer switch), with the platform updates the II brings: tighter PowerControl tuning, full ESS support for grid-tied storage applications, and updated comms that integrate cleanly with the current Cerbo GX firmware.
3000VA output, roughly 2400W continuous, sized for marine and big-RV 12V banks. PowerAssist still works the same way: shore or generator input gets a temporary boost from the battery during a surge, then the battery recharges as the surge passes.
If you're starting fresh on a 12V build today, the II is the version to spec. Five-year Victron warranty.
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Victron MultiPlus 12/3000
The MultiPlus 12/3000 is Victron's inverter/charger built around a 12V battery bank. 3000VA output, roughly 2400W continuous, with a fast-response transfer switch and a powerful charger sized for the bigger 12V house banks common on boats and large RVs. PowerAssist is the feature that earns its keep on shore power. When your shore connection is sized too small for a temporary surge (an air conditioner kicking on while the microwave runs), PowerAssist taps the battery bank to cover the gap, then quietly tops the battery back off when the surge passes. You stay on the shore breaker. The same logic applies on a small generator. Built for 12V house banks. Pair it with a Cerbo GX (or a smaller Victron monitoring controller) and a SmartSolar MPPT for a full Victron stack on a marine or large RV build. Five-year Victron warranty.
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The MultiPlus 24/3000 is the 24V battery-side version of Victron's 3000VA inverter/charger, with UL1741 listing for US grid-tied applications. 3000VA output, roughly 2400W continuous. Same PowerControl, PowerAssist, and high-speed transfer switch as the rest of the MultiPlus line. 24V banks land in a sweet spot for mid-size systems: lower DC current than a 12V build for the same watts (which means smaller wire and smaller fuses on the battery side), and more inverter options than a small 48V build. Common on serious off-grid cabins, larger marine banks, and farm or shop installs where 48V feels like overkill. UL1741 listing means this machine can be deployed in a US grid-tied install where the AHJ requires a listed inverter. Pair it with the right battery and a Victron Cerbo GX for full ESS functionality. Five-year Victron warranty.
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The MultiPlus 48/8000 is the largest single-unit MultiPlus in the lineup. 48V battery side, 8000VA output, roughly 6400W continuous, with a 110A charger for putting energy back into a large battery bank quickly. This is the size of unit you'd reach for on a whole-home off-grid install where one machine handles the load instead of paralleling smaller units. PowerControl lets it share a limited shore or generator input without tripping breakers, and PowerAssist covers transient surges off the battery bank. Up to three of these can be paralleled for ~24kW of continuous capacity on bigger systems. VE.Bus comms tie it to the rest of the Victron stack (Cerbo GX, MultiPlus-II if you're mixing, SmartSolar charge controllers). Five-year Victron warranty.
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