Victron MultiPlus Inverter/Charger 12 VDC - 3000VA - 120vAC w/120AMP Battery Charger - 50AMP Transfer Switch [PMP123021102]

Victron MultiPlus 12/3000/120-50: 3,000VA = 2,400 watts continuous

A 12V inverter/charger from Victron Energy with 120V AC output: an inverter, a battery charger (up to 120 A) and an automatic transfer switch (50 A) in one box. On shore power or a generator it charges your batteries and passes AC through to the boat; when shore power drops, it switches to the batteries.

Why the VA number isn't the watts: Victron rates its inverters in VA (volt-amps). This one delivers 2,400W continuous at 77°F (25°C) and 6,000W peak for motor and compressor start-up. Size your loads around 2,400W, not 3,000W. Compare all Victron inverters →

What it will run on a boat

At 2,400W it handles a full-size microwave, coffee maker, power tools or a hair dryer, one big load at a time, with electronics running alongside. Add up everything you'll run at the same time and leave 20–25% headroom.

Battery draw and wiring

At full continuous output it pulls roughly 215 amps from a 12V battery bank (2,400W ÷ 12V ÷ 93% efficiency). Size the battery cables, DC fuse and battery bank for that current. The manual lists Victron's recommended cable and fuse sizes for this model.

Mounting it in a hot engine room?

Continuous output drops as the temperature rises: 2,200W at 104°F (40°C), 1,700W at 149°F (65°C). In the Keys an engine room or lazarette can easily run hotter than 104°F, so size for the hottest spot you'll mount it and give it airflow.

Idle draw at anchor

Switched on with nothing plugged in, it uses about 20W, roughly 40Ah per day from a 12V bank. Turn on 15 W in AES mode or 8 W in search mode to cut that down when you're off the dock.

On shore power

Set the AC input current limit to match your dock pedestal or generator. With PowerAssist, it cuts back battery charging and adds battery power during peaks so you don't trip the shore breaker. Charging is adaptive, 4-stage (default 14.4 VDC absorption / 13.8 VDC float), programmable for lithium, AGM or flooded banks. A separate starter-battery output (4 A) keeps the engine battery topped up.

Specifications (from Victron)

Documents

• Datasheet
• Manual
• Example boat wiring diagram 1
• Example boat wiring diagram 2

Newer model available: Victron has replaced this unit with the Victron MultiPlus Inverter/Charger 12VDC - 3000VA - 120VAC w/ 120AMP Battery Charger - 50AMP Transfer Switch (UL 1741 UL 458) [PMP122301102].

Buying from OnBoard

We install Victron systems on boats in Marathon and the Florida Keys. Not sure which size you need? Call 305-998-4300 or email contact@onboardmarinegoods.com and we'll help you size it and plan the wiring before you buy. Local pickup is available at our shop on US-1 in Marathon.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.