Victron Energy 3000 Watt 12 VDC - 120 VAC (Multi-Plus) VE.Bus (UL) Pure Sine Wave Inverter/Charger
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Visit CalculatorThe Victron Energy MultiPlus 12/3000/120 is a multifunctional inverter/charger that combines a true sine wave inverter, an adaptive battery charger, and a high-speed AC transfer switch in one unit. Designed for 12V battery systems, it provides 3000VA output, 120 VAC power, a 50A transfer switch, and a high-capacity 120A house battery charger. It is built for off-grid, marine, RV, mobile, and backup power systems where reliable AC power and battery charging are needed.
True Sine Wave Inverter - Delivers clean 120 VAC ±2% output power with 60 Hz ±0.1% frequency, helping support compatible appliances, electronics, and essential AC loads.
PowerControl - Helps prevent generator, shore power, or grid input from being overloaded by allowing the MultiPlus to account for other AC loads and use only the extra available power for battery charging.
PowerAssist - Supplements limited generator or shore power with battery power when the connected load temporarily requires more power than the AC source can provide.
High-Speed Transfer Switch - Includes a 50A transfer switch that allows the MultiPlus to quickly take over connected loads when shore, generator, or grid power is disconnected.
Adaptive Battery Charging - Uses adaptive charge technology to fine-tune the charging process based on battery condition, with support for long float periods and dual-bank charging.
Auxiliary Output - Includes an auxiliary AC output that is live only when AC input power is available, helping keep selected loads from discharging the battery.
Parallel and 3-Phase Operation - Supports parallel operation and three-phase system configuration for applications that require higher power output or more advanced system design.
VE.Bus Communication - Includes a VE.Bus communication port for parallel and three-phase operation, remote monitoring, and system integration.
Remote On/Off - Supports remote on/off operation for easier control in integrated power systems.


Everything you need is included with your product.
| Specification | Details |
| PowerControl | Yes |
| PowerAssist | Yes |
| Transfer switch (A) | 50 |
| Parallel and 3-phase operation | Yes |
Inverter
| Specification | Details |
| Input voltage range (VDC) | 9,5 – 17 V | 19 – 33 V |
| Output | Output voltage: 120 VAC ± 2 % | Frequency: 60 Hz ± 0,1 % |
| Cont. output power at 25 ºC / 77 °F (VA | 3000 |
| Cont. output power at 25 ºC / 77 °F (W) | 2400 |
| Cont. output power at 40 ºC / 104 °F (W) | 2200 |
| Cont. output power at 65 ºC / 150 °F (W) | 1700 |
| Peak power (W) | 6000 |
| Maximum efficiency (%) | 93 / 94 |
| Zero load power (W) | 20 / 20 |
| Zero load power in AES mode (W) | 15 / 15 |
| Zero load power in Search mode (W) | 8 / 10 |
Charger
| Specification | Details |
| AC Input | Input voltage range: 95-140 VAC | Input frequency: 45 – 65 Hz | Power factor: 1 |
| Charge voltage 'absorption' (VDC) | 14,4 / 28,8 |
| Charge voltage 'float' (VDC) | 13,8 / 27,6 |
| Storage mode (VDC) | 13,2 / 26,4 |
| Charge current house battery (A) | 120 / 70 |
| Charge current starter battery (A) | 4 |
| Battery temperature sensor | yes |
General
| Specification | Details |
| Auxiliary output | Yes (32 A) |
| Programmable relay | Yes (3x) |
| Protection | a - g |
| VE.Bus communication port | Yes (2x) |
| Remote on-off | Yes |
| Common Characteristics | Operating temp. range: -40 - +65 °C / -40 to 150 °F (fan assisted cooling) | Humidity (non-condensing): max 95% |
Enclosure
| Specification | Details |
| Common Characteristics | Material & Colour: aluminium (blue RAL 5012) | Protection category: IP 21 |
| Battery-connection | M8 bolts (2 plus and 2 minus connections) |
| 120 V AC-connection | Screw-terminal 6 AWG (13mm²) |
| Weight | 19kg (40 lbs.) |
| Dimensions (hxwxd in mm and inches) | 362x258x218 mm 14.3x10.2x8.6 inch |
Standards
| Specification | Details |
| Safety | UL 1741, UL 458, EN-IEC 60335-1, EN-IEC 60335-2-29 |
| Emission and Immunity | EN-IEC 61000-3-2/3-3/, EN-IEC 61000-6-1/6-2/6-3 |
What is the Victron Energy MultiPlus 12/3000/120 used for?
The MultiPlus is used in battery-based power systems where inverter output, battery charging, and AC transfer switching are needed in one unit. It is commonly used in off-grid, marine, RV, backup power, and mobile power applications.
Does this unit provide pure sine wave output?
Yes. The MultiPlus provides true sine wave inverter output with 120 VAC ±2% output voltage and 60 Hz ±0.1% frequency.
What is PowerControl?
PowerControl helps manage limited generator, shore power, or grid input by preventing the AC source from being overloaded while still using available extra power for battery charging.
What is PowerAssist?
PowerAssist allows the MultiPlus to supplement limited generator or shore power with battery power when the connected load needs more power than the AC source can supply.
Can this unit be used with a generator?
Yes. The MultiPlus is designed to work with generator or shore power sources. It can help manage limited AC input power and charge the battery system when AC power is available.
Does this model include an auxiliary output?
Yes. The 12/3000/120 model includes an auxiliary output rated at 32A. This output is live only when AC input power is available.
Can the MultiPlus be used for parallel or three-phase systems?
Yes. The MultiPlus supports parallel and three-phase operation through its VE.Bus communication port.
Should this unit be installed by a professional?
Yes. Victron states that this product may only be installed by a qualified electrical engineer, and it should be installed in a dry, well-ventilated area with proper clearance for cooling.
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