Victron MultiPlus-II 24V 3000VA | 70A Charger 50A Transfer

The Ultimate All-in-One: Victron MultiPlus-II 24/3000 2x120V

The Victron MultiPlus-II 24/3000 70-50 2x120V (MPN: PMP242305132) is a highly advanced, multifunctional inverter/charger engineered with two AC outputs. Suitable for professional marine, yachting, vehicle, and land-based off-grid systems, it provides the isolation and redundancy required for advanced Energy Storage Systems (ESS). Operating on a 24V DC system, it elegantly combines a robust inverter, a fast and efficient 70A smart adaptive battery charger, and a 50A transfer switch in one UL 458-certified package.   

PowerAssist and Uninterrupted AC Power (UPS)

The MultiPlus-II utilizes Victron’s innovative PowerControl and PowerAssist technology to prevent the overload of a limited AC source, such as a generator or shore power connection. It first automatically reduces battery charging to avoid an overload, and then seamlessly boosts the output of your AC supply with power drawn directly from the battery during peak demand. In the event of a grid failure or disconnected shore/generator power, the built-in UPS function automatically takes over the supply to connected loads in less than 20 milliseconds, ensuring computers and sensitive electronics operate without disruption.   

Scalability, Dynamic ESS, and Remote Monitoring

As the key component in a Victron Energy Storage System, the unit features Dynamic ESS, which automatically switches between grid, battery, and solar energy based on live pricing, predicted energy use, and solar yield to ensure you consume the cheapest energy. Ready for expansion, the MultiPlus-II supports parallel and three-phase configurations when a system needs to scale. When paired with a GX device (such as the Cerbo GX), users can monitor and control their system locally via LAN or remotely from anywhere in the world using the free VRM app and portal.

Technical Specifications

• Brand: Victron Energy
• Model: MultiPlus-II 24/ 3000 70-50 2x120V   
• Part Number (MPN): PMP242305132   
• Input Voltage: 24V DC   
• Output Configuration: 2x120V with two AC outputs   
• Inverter Capacity: 3000VA   
• Battery Charger Capacity: 70A   
• Transfer Switch Rating: 50A   
• Certifications: UL 458   
• UPS Transfer Time: Less than 20 milliseconds   
• Scalability: Supports parallel and three-phase configurations   
• Monitoring: Compatible with GX devices (e.g., Cerbo GX) and VRM app/portal 

FAQs

What is the difference between the MultiPlus-II and older models?

The MultiPlus-II is a multifunctional inverter/charger that provides the isolation and redundancy required for ESS setups. It includes all standard features plus advanced integration capabilities. (Note: For a short period of time, this product was called the MultiGrid-II).   

What is the Victron Dynamic ESS feature?

Dynamic ESS takes Energy Storage Systems to the next level by automatically switching between or combining grid, battery, and solar energy based on live pricing, predicted energy use, and solar yield, ensuring you are always consuming the most cost-effective energy available.   

How does the Victron MultiPlus-II PowerAssist feature work?

PowerControl and PowerAssist prevent the overload of a limited AC source like shore power or a generator. First, it automatically reduces battery charging to avoid an overload. Second, it boosts the output of the generator or shore supply by supplementing it with power taken directly from the battery.   

What is the best way to wire the AC terminals on the MultiPlus-II to prevent overheating?

As frequently discussed by users and installers in DIY solar and marine forums, the push-in/clamp-style AC terminals on the MultiPlus-II require precise installation. To prevent the terminals from overheating or arcing under heavy loads, it is highly recommended (and emphasized in updated Victron manuals) to use properly crimped wire ferrules and ensure adequate stripped length on all AC wire connections.

Why does my MultiPlus-II trip the GFCI outlet when plugged into shore power?

Users often note on forums that when plugging the MultiPlus-II into a GFCI-protected shore power outlet, the shore breaker may trip when the charger initiates. This is typically due to the unit's internal ground relay bonding the neutral and ground during startup or inverter mode, which the sensitive shore GFCI interprets as a ground leakage fault. Ensure your system is wired with proper, separated grounding practices.