Victron Energy

Victron Energy MultiPlus-II 12/3000/120-50 2x120V Pure Sine Wave Inverter Charger, 3000VA 2400W, 120A Charger, 50A, Split-Phase Input, PMP122305100

Victron Energy MultiPlus-II 12/3000/120-50 2x120V Pure Sine Wave Inverter Charger, 3000VA 2400W, 120A Charger, 50A, Split-Phase Input, PMP122305100

⚑ 3000VA Pure Sine Inverter|πŸ”‹ 120A Charger, ESS Ready|πŸ” 50A Split-Phase Input|πŸ›‘οΈ 5-Year Victron Warranty
Price: $953.70
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Price: $953.70
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Call Us 833-664-7433
  • πŸ‡ΊπŸ‡ΈFree ShippingContiguous 48 states
  • πŸ›‘οΈ5-Year WarrantyVictron limited warranty
  • ⚑3-in-1 UnitInverter, charger & transfer switch
  • πŸ”‹ESS ReadySolar & energy storage systems
  • πŸ”€Split-Phase Input120/240V shore or generator
  • πŸ“žReal Human SupportSystem sizing & setup help

Victron Energy MultiPlus-II 12/3000/120-50 2x120V (PMP122305100): a pure sine wave inverter, battery charger and automatic transfer switch built for modern solar and lithium systems. Run 120V AC loads from your 12V battery bank with 3000 VA / 2400 W of continuous pure sine wave power and 5500 W peak. When shore power, a generator or the grid is connected, the 120 A charger refills your batteries and the 50 A transfer switch takes over in less than 18 ms. As a 2x120V model it accepts 120/240V split-phase input and passes 240V through to your loads, while inverting 120V from the batteries. PowerControl, PowerAssist, ESS support and a built-in ground relay make it a favorite for RV, marine, off-grid and home backup systems. Backed by Victron's 5-year limited warranty.

3000 VA2400 W continuous
120 ABattery charger
50 AAC input / transfer
5500 WPeak power

Ratings at 25Β°C (77Β°F) ambient, from Victron's datasheet. Output drops at higher temperatures, see the table below.

⚑ Is It Right for Your System?

Built for 12V battery banks in systems with 120/240V split-phase shore or generator power. Common uses:

  • 50A RVs & motorhomes
  • Boats with 120/240V shore power
  • Homes & cabins with split-phase panels
  • Off-grid solar & storage
πŸ“ Quick check before you order:
  • Your battery bank is 12V (inverter input range 9.5–17 V).
  • You have 120/240V split-phase shore or generator power. On batteries alone it inverts 120V only (240V loads run only while split-phase power is connected).
  • Your AC loads stay within 2400 W continuous at 25Β°C, with short surges up to 5500 W.
  • Your shore, generator or grid input is up to 50 A per leg. PowerControl lets you set a lower limit.
  • Plan for battery cables, a DC fuse and AC wiring sized per Victron's manual (not included).
  • Need UL for an RV, inspection or permit? This version isn't UL listed. See the UL models in the table below.
Not sure? Tell us your loads and battery bank and we'll help you size it before you buy.

Why Choose a Victron MultiPlus-II

πŸ”

Three Units in One

A pure sine wave inverter, an adaptive battery charger and an automatic transfer switch share one box, saving space and wiring.

πŸ”Œ

PowerControl & PowerAssist

Set a maximum shore or generator current. When loads spike past it, the MultiPlus-II adds battery power so the breaker doesn't trip.

β˜€οΈ

Built for Solar & ESS

Supports Victron's Energy Storage System (ESS) mode for self-consumption, and works with Victron GX devices, MPPT solar chargers and lithium battery BMS integration.

⚑

Fast, Smooth Transfer

Switches to battery power in less than 18 ms on the L1 output (about 40 ms on L2). A built-in ground relay connects neutral to chassis automatically when running on batteries.

πŸ”—

Expandable

Up to 6 units in parallel, and 3 units for three-phase output. In multi-phase setups the L2 output is disabled.

πŸ›‘οΈ

5-Year Victron Warranty

Victron covers the MultiPlus-II for 5 years from purchase by the original end user, and warranty claims go through us.

πŸŽ₯ Victron MultiPlus-II Videos

Introduction: MultiPlus-II

Update MultiPlus firmware from an Android phone

🌑️ Output vs. Temperature

Ambient temperature Continuous output
25Β°C (77Β°F) 3000 VA / 2400 W
40Β°C (104Β°F) 2200 W
65Β°C (149Β°F) 1700 W
Peak (short surges) 5500 W

Per Victron's datasheet. Mount it somewhere cool and well ventilated to get the most out of it.

πŸ“¦ What's Included & What You'll Need

  • Victron Energy MultiPlus-II 12/3000/120-50 2x120VVictron MultiPlus-II 12/3000/120-50 2x120VPart number PMP122305100
  • Battery Cables & DC FuseNot included. Size them per Victron's manual
  • GX Device (recommended)e.g. Cerbo GX for ESS, lithium BMS integration and VRM remote monitoring. Sold separately
  • Programming InterfaceMK3-USB (VEConfigure) or VE.Bus Smart dongle (VictronConnect). Sold separately
  • External AC Current Sensor (optional)100 A sensor for grid metering, ordered separately
Plan to add: Victron doesn't publish a box contents list. Expect the inverter/charger itself; wiring, fusing, a GX device, programming interface and sensors are bought separately. Ask us and we'll put together everything your install needs.

πŸ” Compare Victron MultiPlus-II Models

Every MultiPlus-II we carry, side by side. Ratings are Victron's, at 25Β°C.

Model Part # Battery Inverter Charger AC input AC type UL
MultiPlus-II 12/3000/120-50 120V PMP122305120 12V 3000 VA / 2400 W 120 A 50 A 120V Not UL listed
MultiPlus-II 12/3000/120-50 120V UL PMP122305122 12V 3000 VA / 2400 W 120 A 50 A 120V UL 458
MultiPlus-II 12/3000/120-50 2x120V (this model) PMP122305100 12V 3000 VA / 2400 W 120 A 50 A 2Γ—120V (split-phase input) Not UL listed
MultiPlus-II 12/3000/120-50 2x120V UL PMP122305102 12V 3000 VA / 2400 W 120 A 50 A 2Γ—120V (split-phase input) UL 458
MultiPlus-II 12/4k/160-50 120V PMP122405100 12V 3400 W 160 A 50 A 120V Not UL listed
MultiPlus-II 24/3000/70-50 120V UL PMP242305102 24V 3000 VA / 2400 W 70 A 50 A 120V UL 458
MultiPlus-II 24/3000/70-50 2x120V UL PMP242305132 24V 3000 VA / 2400 W 70 A 50 A 2Γ—120V (split-phase input) UL 458
MultiPlus-II 24/5000/120-95 120V PMP242505110 24V 5000 VA / 4000 W 120 A 95 A 120V Not UL listed
MultiPlus-II 48/3000/35-50 120V PMP482305100 48V 3000 VA / 2400 W 35 A 50 A 120V Not UL listed
MultiPlus-II 48/3000/35-50 120V UL PMP482305102 48V 3000 VA / 2400 W 35 A 50 A 120V UL 1741 & UL 458
MultiPlus-II 48/5000/70-95 120V PMP482505110 48V 5000 VA / 4000 W 70 A 95 A 120V Not UL listed
MultiPlus-II 48/5000/70-95 120V 50/60Hz PMP482505300 48V 5000 VA / 4000 W 70 A 95 A 120V Not UL listed
MultiPlus-II 48/5000/70-95 120V UL PMP482505120 48V 5000 VA / 4000 W 70 A 95 A 120V UL 1741

Need help choosing? Call 833-664-7433 and we'll size it to your loads.

πŸ”‹ Charging Your Batteries

πŸ”‹

Lithium or Lead-Acid

Default charge voltages are 14.4 V / 13.8 V / 13.2 V (absorption / float / storage). Adjust them with VEConfigure or VictronConnect, or let a GX device and your lithium BMS control charging.

πŸ”Œ

Shore, Generator or Grid

Charges from 120/240V split-phase or 120V single-phase shore, generator or grid power, and PowerControl keeps it within your shore or generator limit.

🚀

Starter Battery Output

A separate 4 A output keeps an engine or starter battery charged.

🌑️

Temperature Compensation

A battery temperature sensor input adjusts charging for hot and cold conditions.

πŸ›‘οΈ 5-Year Victron Limited Warranty

Years 1–5Victron limited warranty from the original end user's purchase date (max 66 months from Victron's invoice date)
Up to Year 10Optional extension to 10 years, sold through Victron's direct customers. Ask us about eligibility.

Warranty claims are made through the place of purchase, which is us. Victron's warranty doesn't cover physical damage or alteration, misuse (reversed polarity, poor or loose connections, liquid or condensation, lightning), improper installation, repairs by anyone other than Victron or an authorized repair centre, or the cost of removal, shipping and reinstallation. Full terms in Victron's warranty policy below.

πŸ“‹ Full Specifications

Inverter
Model / Part Number MultiPlus-II 12/3000/120-50 2x120V / PMP122305100
Battery Voltage 12V (input range 9.5–17 V)
AC Output 120 VAC Β±2%, 60 Hz Β±0.1% (inverts 120V single phase only)
Continuous Power at 25Β°C 3000 VA / 2400 W
Continuous Power at 40Β°C / 65Β°C 2200 W / 1700 W
Peak Power 5500 W
Max Efficiency 93%
Zero-Load / AES / Search Mode 15 W / 10 W / 4 W
Charger & AC
AC Input Split phase: 180–280 VAC; single phase: 90–140 VAC; 55–65 Hz
Charge Voltage (absorption / float / storage) 14.4 V / 13.8 V / 13.2 V
Max Charge Current 120 A (at 25Β°C)
Starter Battery Charge Current 4 A
Battery Temperature Sensor Yes
Transfer Switch / Max AC Input 50 A per leg
Transfer Time L1 output: less than 18 ms; L2 output: about 40 ms
Auxiliary Output (AC-out-2) 50 A per leg, switches off when no AC source is connected
PowerControl / PowerAssist Yes (on L1 input)
System & Control
ESS (Energy Storage System) Supported. Victron notes grid feed-in isn't UL 1741 or CSA 107.1 certified
Parallel / 3-Phase Up to 6 in parallel; 3 units for three-phase (wye only); L2 disabled in multi-phase setups
Ground Relay Built in, connects neutral to chassis when no AC source is present
External Current Sensor Optional 100 A, ordered separately
Programmable Relay Yes (120 V / 4 A AC; 4 A up to 35 VDC, 1 A up to 60 VDC); alarm, low DC voltage or genset start/stop
Ports VE.Bus, 2Γ— general-purpose com ports, remote on/off
Protection Output short circuit, overload, battery voltage too high, battery voltage too low, temperature too high, 120 VAC on inverter output, input voltage ripple too high
Operating Temperature -40 to +65Β°C
Humidity Max 95%, non-condensing
Enclosure & Certifications
Enclosure Steel, blue (RAL 5012)
Protection Category IP22
Battery Connection 2Γ—2 M8 bolts
AC Connection Screw terminals, 21 mmΒ² (4 AWG)
Weight 22 kg (48 lb)
Dimensions (H Γ— W Γ— D) 578 Γ— 275 Γ— 148 mm (23 Γ— 11 Γ— 6 in)
Safety Standards EN-IEC 60335-1, EN-IEC 60335-2-29
Recommended DC Fuse & Cable 400 A fuse, 2Γ— AWG 1/0 cable (per Victron's manual)
Warranty 5-year Victron limited warranty

πŸ“„ Manuals & Downloads

🌐Victron Product PageMultiPlus-II 2x120VVICTRON β†— πŸ“„DatasheetMultiPlus-II 2x120V (PDF)PDF β†— πŸ“˜Owner's ManualMultiPlus-II 2x120V (PDF)PDF β†— πŸ“ŠOnline ManualMultiPlus-II 2x120V, full technical specsVICTRON β†— πŸ”§Quick Install GuideMultiPlus-II 12V 3kVA 2x120V (PDF)PDF β†— πŸ“Dimension DrawingMultiPlus-II 12V 3000VA 2x120V (PDF)PDF β†— πŸ“œVictron Limited WarrantyFull warranty policy (PDF)PDF β†—

Victron doesn't publish a box contents list for the MultiPlus-II. Manuals, drawings and certificates above link straight to Victron.

❓ Common Questions

What's the difference between the MultiPlus-II and the original MultiPlus?
The MultiPlus-II adds ESS (Energy Storage System) support, a built-in ground relay, an option for an external AC current sensor and tighter integration with Victron GX devices, which is why it's the usual choice for solar, lithium and home backup systems.
Will it start my air conditioner, microwave or pump?
Motors and compressors pull a short surge when they start. This model handles surges up to 5500 W, with 2400 W continuous. Send us the appliance labels and we'll confirm.
Will it work on smaller shore power or a small generator?
Yes. PowerControl lets you set the maximum AC input current (up to 50 A), and PowerAssist adds battery power during peaks so a small shore connection or generator doesn't trip.
Can it power my 240V appliances?
Only while 120/240V split-phase shore or generator power is connected; it passes 240V through to your loads. On batteries alone it inverts 120V, and the L2 output follows the AC input.
Can I use it with lithium batteries?
Yes. Charge voltages are adjustable, and with a GX device the MultiPlus-II can take charge commands directly from a compatible lithium battery's BMS over Victron's communication ports.
How do I program and monitor it?
Use an MK3-USB interface with Victron's free VEConfigure software, or a VE.Bus Smart dongle with the VictronConnect app. A GX device like the Cerbo GX adds ESS control and remote monitoring on Victron's VRM portal. All are sold separately.
Is it UL listed?
No, this version isn't UL listed. Many RV builders, inspectors and permit offices ask for UL 458 or UL 1741, so check the UL models in the comparison table if you need it.
What size cables and fuse do I need?
Victron's manual calls for a 400 A DC fuse and 2Γ— AWG 1/0 cable for this model. Ask us and we'll spec your wiring.
How does the warranty work?
Victron covers it for 5 years from the original end user's purchase date. Warranty claims go through the place of purchase, so contact us and we'll handle it with Victron.

Questions About Your Setup? Ask Us First.

Tell us your battery bank, your biggest AC loads and your shore, generator or grid power, and we'll confirm the right MultiPlus-II before you order.

πŸ“ž Call 833-664-7433 πŸ“§ Email Us