MultiPlus-II 48/5000/70-50
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A MultiPlus, plus ESS (Energy Storage System) function
The MultiPlus-Il is a multifunctional inverter/charger with all the functions of the MultiPlus and an additional function, namely that of an external current sensor. This extends the PowerControl and PowerAssist functions to 50 A and 100 A respectively. The MultiPlus-Il is ideally suited for professional seafaring, yachts, vehicles and land-based, off-grid applications. It also has an integrated function to protect against islanding. Several different system configurations are possible. Further information can be found in the ESS Design & Configuration manual.
PowerControl and PowerAssist - increasing grid or generator power
A maximum grid or generator current can be set. The MultiPlus-Il then takes other AC loads into account and only uses the current that is still "left over" to charge the battery. This prevents the generator or mains connection from being overloaded (PowerControl function).
The PowerAssist function adds a new dimension to the PowerControl principle. Load peaks often only occur for a limited period of time. In such cases, the MultiPlus-Il immediately compensates for insufficient generator, shore power or mains power with energy from the battery. If the load is reduced, the "surplus" energy can be used to charge the batteries.
Solar power: alternating current even in the event of a grid failure
The MultiPlus-Il can be used with both non-grid-connected and grid-connected PV systems as well as other alternative energy systems. It can be used with both solar charge controllers and grid-connected inverters.
Two AC outputs
The main output ensures uninterrupted operation. In the event of a mains failure or an interruption in the shore/generator current, the MultiPlus-Il takes over the supply to the connected loads. Switching takes place so quickly (in less than 20 milliseconds) that uninterrupted operation of computers and other electronic devices is guaranteed.
The second output only supplies power if alternating current is available at the input of the MultiPlus-Il. Loads that must not discharge the battery, such as a water heater, can be connected to this output. The loads connected to the second output are taken into account by the PowerControl and PowerAssist function.
Virtually unlimited power thanks to parallel and three-phase operation
Up to six multis can be connected in parallel if there is a high power requirement. In addition to the parallel connection, three units of the same model can also be configured for a three-phase output. But that's not all: up to 6 sets of three devices can be connected in parallel
On-site system configuration, monitoring and control
Settings can be changed in minutes using the VEConfigure software (requires a computer or laptop and an MK3 USB interface). Several monitoring and control options are available: Ekrano GX, Cerbo GX, Venus GX, laptop, computer, Bluetooth (with optional VE.Bus Smart Dongle), battery monitor, Digital Multi Control.
Remote configuration and monitoring
Install a Cerbo GX or other GX products to connect to the Internet. The operating data can be stored and viewed free of charge on our VRM (Victron Remote Management) website. If systems are connected to the Internet, they can be accessed remotely and settings can be changed.
Victron MultiPlus-II 48/4k5/55-32 GX: The brain of your energy self-sufficiency
Are you planning a powerful energy system, but want a clean, simple and cost-effective installation? You want the full power of a MultiPlus-II, but without the additional effort and cost of a separate control unit?
Then the Victron MultiPlus-II 48/4k5/55-32 GX is the answer for you. It is more than just an inverter. It is a revolution in a housing: Victron has merged the proven power of the MultiPlus-II 4k5 with the complete intelligence of a Cerbo GX.
The result is an uncompromising all-in-one solution - the perfect heart and brain for sophisticated off-grid systems and smart, space-saving home storage systems.
Your advantage in 30 seconds: Why the MultiPlus-II GX is the right choice
- All-in-one control center
Inverter, charger and transfer switch in one device. This saves space, cables and complexity during installation.
- Heart & brain on board
The complete GX control unit (like a Cerbo GX) is already integrated - including display and WiFi. You save money and effort. - Real emergency power
Switches to battery in less than 20 milliseconds in the event of a mains failure. Your devices continue to run without interruption.
- Powerful & reliable
4000 watts continuous power and 7000 watts peak power start even heavy consumers such as pumps or tools effortlessly.
- Perfect for Energy storage systems (ESS)
Intelligently optimizes your self-consumption and reduces your electricity bill by storing excess solar power in your battery.
- Worldwide remote access
The free Victron VRM portal gives you control of your entire system anytime and anywhere via app or web browser.
What is the MultiPlus-II 48/4k5/55-32 GX really? More than the sum of its parts
The MultiPlus-II can do far more than just convert battery power to mains power. It is a sophisticated 4-in-1 combination device designed to be the intelligent heart of your entire energy supply. Let's look at the key functions in detail:
- The inverter: It converts the 48V direct current from your battery into clean 230V alternating current. You can use it to power everything in your home, from the fridge to the heat pump.
- The battery charger: With up to a powerful 55 amps, it recharges your battery bank from the mains or a generator - quickly and without damaging the battery.
- The transfer switch (UPS): In the event of a power failure, the device switches to battery operation at lightning speed - i.e. your lights don't flicker and your computer doesn't crash. This is real, uninterruptible power supply.
- The PowerAssist booster: Do you only have a weak mains connection (e.g. camping site) or a small generator? If you need more power for a short time, the MultiPlus-II intelligently adds power from the battery and prevents the fuse from blowing.
This interaction makes it the Swiss army knife for every modern energy system.
The game changer: why the "GX" makes all the difference
Anyone who plans systems knows that every component that is saved is a gain in reliability and simplicity. The MultiPlus-II GX is the logical implementation of this principle. Instead of buying and wiring an inverter and a separate control unit, you get both in one perfectly coordinated device.
What the "GX" means for you in concrete terms - the advantages of integrated intelligence
- Direct communication: The MultiPlus-II communicates directly with certified lithium batteries (e.g. from Pylontech, BYD) via the integrated BMS-Can-Port. This ensures maximum safety and optimum performance of your storage system.
- Full connectivity: With LAN, WLAN, USB and VE.Direct connections, you can seamlessly integrate solar charge controllers and other Victron components into your system. Everything communicates perfectly with each other.
- No additional costs: You save yourself the purchase of a separate Cerbo GX costing several hundred euros. You can invest this money more wisely.
- Easier installation: Fewer devices mean less cabling, fewer potential sources of error and cleaner, faster commissioning of your system. Everything is in one box.
The expert tip: Ingenious cost advantage with 3-phase systems
This is where the full strength of the integrated GX concept comes into play - a trick that many people are unaware of. You don't need three expensive GX devices for a powerful, three-phase system (e.g. for an entire house or business). You build an intelligent master-slave architecture:
- The master: 1x MultiPlus-II 48/4k5/55-32 GX (This device here. It is the brain of the entire network.)
- The slaves: 2x MultiPlus-II 48/4k5/55-32 (standard version) (The more cost-effective power packs that are controlled by the master).
The result: A fully-fledged, highly intelligent 3-phase system at a significantly lower overall price, without compromising on functionality. That's smart engineering that has a direct impact on your wallet.
Technical deep dive: MultiPlus-II vs. MultiPlus-II GX
The difference between the standard model and the GX version lies not in the power, but in the intelligence. Both devices deliver exactly the same proven performance. However, the GX version integrates the complete control system, which you would otherwise have to buy at a high price.
The key differences at a glance:
| Merkmal | MultiPlus-II 48/4k5/55-32 (Standard) | MultiPlus-II 48/4k5/55-32 GX (Dieses Modell) |
|---|---|---|
| Leistung & PowerAssist | ✔️ Identisch | ✔️ Identisch |
| Steuereinheit | ❌ Extern erforderlich (z. B. Cerbo GX) | ✔️ Vollständig integriert |
| Display | ❌ Nein | ✔️ Integriertes Status-Display |
| Netzwerk-Anschluss | ❌ Nur über externen GX | ✔️ WiFi & Ethernet an Bord |
| Moderner Batterie-Port | Nur VE.Bus | ✔️ VE.Bus + direkter BMS-Can Port |
| Ideal für… | Kostengünstige Erweiterung (Slave) | Kompakte Neuinstallation & 3-Phasen (Master) |
Conclusion: For any new stand-alone system, the GX version is the smarter, more cost-effective and simpler choice. The standard MultiPlus-II is the perfect addition as a powerful "slave" in a 3-phase network controlled by a GX device like this one.
Our expert opinion: When is this MultiPlus-II the perfect choice?
We plan systems for a wide variety of requirements every day. In our experience, the 4k5 GX is ideal for these three core applications:We plan systems for a wide variety of requirements on a daily basis. In our experience, the 4k5 GX is ideal for these three core applications:
The self-sufficient home with energy storage system (ESS):
You have a PV system and finally want to use your solar power yourself instead of feeding it into the grid for a few cents? The MultiPlus-II becomes the center of your storage system. It maximizes your self-consumption, lowers your electricity bill and makes you independent in the event of power outages.
The fail-safe emergency power supply:
Whether for the home office, important medical devices or simply for convenience - this device reliably protects your critical loads. If the mains fails, the battery takes over seamlessly. When the grid is back on, the battery is automatically recharged.
The powerful stand-alone system (off-grid):
The MultiPlus-II is the robust centerpiece for your vacation home, workshop or tiny house without a mains connection. It generates a stable 230V grid from your battery and can intelligently start and control a generator if required.
Victron MultiPlus-II 48/4k5/55-32 GX: The smartest solution for your compact power station
The Victron MultiPlus-II 48/4k5/55-32 GX is the logical answer for anyone looking for maximum power in minimum space and with maximum simplicity. It is the perfect basis for a clean, cost-efficient and highly intelligent energy system.
This well-founded system planning is our core competence. We at Verkauf-Bochum.de are your partner who turns excellent components into your personal power plant.
Frequently asked questions (FAQ)
What is the main advantage of the GX model and do I still need a Cerbo GX?
The main advantage is the integrated intelligence. The MultiPlus-II GX is a powerhouse and brain in one and already has the complete control of a Cerbo GX on board.
The answer is therefore clear: No, you save the separate Cerbo GX completely - and therefore costs, space and installation effort.
Which batteries are best suited to the MultiPlus-II GX?
Thanks to the BMS Can port, the device is ideal for modern, certified lithium storage systems. At Verkauf-Bochum.de, we prefer to use the tried-and-tested storage systems from Voltsmile for our system solutions. This combination is perfectly matched and guarantees maximum safety and performance. Of course, the device is also compatible with other brands such as Pytes, Voltsmile or BYD.
Can I operate the device for my PV system on the German power grid?
Certification in accordance with VDE-AR-N 4105 is crucial for the legal operation of a grid-connected system (ESS). The approval processes are dynamic. Please contact us for up-to-date information on the certification status! This is a critical point on which we can provide you with expert advice.
For which application is an external energy meter mandatory?
An external meter such as the Victron EM24 is essential for all grid-connected systems (e.g. for optimizing self-consumption with your PV system). This is the only way the system can regulate intelligently. It is not required for purely stand-alone systems (off-grid) without a grid connection.