Offgridtec Backup Kit 3-phase 7kWh with Pylontech US3000C battery Victron MultiPlus-II 48/5000

Offgridtec backup systems are ideal for emergency power supply or for expanding an existing solar system. In addition to lithium-ion batteries from Pylontech, the systems include a matching MultiPlus-II inverter and a Cerbo GX MK2 for system monitoring from Victron Energy. This allows you to ensure your energy supply even in the event of a power failure.

Thanks to the UPS function, the MultiPlus remains switched on even in the event of a mains failure and takes over the supply to the connected consumers. The switchover is so fast (in less than 20 milliseconds) that uninterrupted operation of computers and other electronic devices can be guaranteed.

Areas of application for the Offgridtec Backup Kit:

• Emergency power supply
• Off-grid solar systems (stand-alone systems)
• Retrofitting of existing PV systems
• Grid-connected power supply
• UPS systems

What does the Offgridtec backup system include?

• Pylontech US3000C 3.5kWh LiFePO4 battery ( 2x, 4x, or 6x depending on selection)
• 3x Victron MultiPlus-II 48/5000/70-50 230V device combination
• 2x Victron Lynx Distributor
• 1x Victron Cerbo GX MK2 control panel
• 1x Victron GX Touch 50 display panel for Cerbo GX
• 1x Victron MK3-USB Ve.Bus to USB interface
• 1x 1.8m VE.Can to Can-Bus BMS Type A cable
• 2x 0.9 m Victron RJ45 UTP cable
• 1x 3m Victron RJ45 UTP cable
• 3x 1 m Offgridtec battery cable 50 mm² M8 eyelets
• 3x Set of 5 MEGA fuses 200A 70V
• Pylontech battery connection cable set (1x or 2x depending on selection)

Extended use of your backup system

To set up an ESS (Energy Storage System) with the backup system, you will need an energy meter with a connection cable:

• Victron VM-3P75CT Energy Meter 3-phase electricity meter 75A/phase
• 5m Victron RJ45 UTP cable

With this electricity meter, you can set up a grid-parallel installation and then monitor your energy consumption or control your energy coststhanks to phase compensation, you can even use the 3-phase meter for 1-phase systems. This makes seamless integration of decentralized energy sources and consumers into the existing power grid no problem at all.

In order for an ESS to be included in the preconfiguration, the meter must be purchased in advance or with the system!

The storage solution – Pylontech US3000C batteries

The US3000C storage unit is a latest-generation lithium battery. It was specially designed to meet the high demands placed on backup storage. Thanks to state-of-the-art technology, maximum safety and a long service life are guaranteed, even with regular deep discharge.

• Extremely cycle-resistant – over 6000 cycles at 95% DoD
• Absolutely intrinsically safe lithium technology
• High charging and discharging performance possible
• Integrated BMS
• Very high storage density – low weight and compact design
• Absolutely maintenance-free and durable
• Pre-charge function to protect the ESS system from overvoltage

The electronic core – the Victron Multiplus-II device combination

The Multiplus-II 48/5000/70-50 is a high-end device combination from Victron Energy (MPN PMP482505010) that combines classic Multiplus components with an external current sensor and integrated anti-islanding function. This extends the PowerControl and PowerAssist functions to 100 A and expands the potential range of applications to include ESS applications. The inverter module delivers a full 5000 W with non-linear loads and 4000 W with linear continuous loads. The 48 V battery charger is also very well proportioned with a charging capacity of 70 A and is supplemented by a 50 A transfer switch that allows you to switch back and forth between the AC connections in a flash.

key performance features of the Multiplus-II 48/5000/70-50

• PowerControl and PowerAssist – increase in mains or generator power
• built-in anti-islanding function and connection option for external current sensor (optional)
• can be used as a backup device in grid-connected systems for power supply during grid failures
• can be used in various ESS (energy storage system) applications
• ideally suited for professional seafaring, yachts, vehicles, and land-based, off-grid applications
• VE.Bus interface for parallel and three-phase operation, remote monitoring, and system integration
• virtually unlimited power through parallel and three-phase operation
• can be configured on site or remotely using VEConfigure software

Always enough power thanks to PowerControl and PowerAssist

A maximum mains or generator current can be set on the MultiPlus-II 48/5000/70-50. The MultiPlus-II then takes other connected AC consumers into account and only uses the "leftover" current 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-II immediately compensates for insufficient generator, shore power, or mains power with energy from the battery. When the load is reduced, i.e., when consumers are switched off, the energy that is then available again can be used to charge the batteries.

Maximum flexibility thanks to two AC outputs

The main output ensures uninterrupted operation. In the event of a mains failure or an interruption in shore power/generator power, the MultiPlus-II takes over the supply to the connected consumers. The switchover is so fast (less than 20 milliseconds) that uninterrupted operation of computers and other electronic devices is guaranteed. The second output only supplies power when AC power is available at the input of the MultiPlus-II. Loads that must not discharge the battery, such as a water heater, can be connected to this output.

Remote configuration and monitoring

Install a Color Control 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.

The MultiPlus-II is delivered unconfigured as standard. You can find the configuration instructions for the system here in the download area. If you would like us to pre-configure the system for you, we will be happy to do so for an additional charge. To do this, add the item "Offgridtec Preconfiguration" linked above to your shopping cart during the ordering process. In this case, shipping may take 3-5 business days longer until the configuration has been completed.

Technical features

• 5000 W power with non-linear load 4000 W continuous load and 9000 W peak power
• for 48 V battery voltage, 50 A transfer switch, and 70 A battery charger
• Output voltage: 230 VAC, frequency: 50 Hz
• max. efficiency is 95%, protection class IP22

System monitoring with the Victron Cerbo GX MK2 and GX Touch Display

With the Cerbo GX MK2 communication center, you can easily control and monitor your system. The flexible connection options maximize your system performance. Thanks to the Cerbo GX MK2, you can control your system from anywhere. With the GX Touch 50 display, you always have an overview of all your system parameters and can make changes quickly and easily.

Safety note: Only have this complete system installed and commissioned by a qualified electrician.