Backup system with Pylontech LiFePo4 storage and MultiPlus ii 48/3000 Victron Energy inverter 1-phase

The single-phase backup systems from Offgridtec are ideal for emergency power supply or for expanding an existing solar system. The systems contain lithium-ion batteries from Pytes, the matching MultiPlus-II inverters and a Cerbo GX MK2 from Victron Energy for system monitoring. This allows you to secure your energy supply even in the event of a power failure.

With the batteries from Pytes, you have a storage capacity of 5.12kWh to 10.24kWh to utilise your energy efficiently and remain self-sufficient for longer if required. 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 loads. The switchover happens so quickly (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 existing PV systems
• Grid-connected power supply
• UPS systems

What does the Offgridtec backup system contain?

• Pytes V5a LiFePO4 battery 5.12kWh 51.2V 100Ah (1x or 2x depending on selection)
• 1x Victron MultiPlus-II 48/3000/35-32 230V
• 1x Victron Lynx Distributor (M8)
• 1x Victron Cerbo GX MK2 communication centre for system monitoring
• 1x Victron GX Touch 50 display panel for Cerbo GX
• 1x 3m Victron RJ45 UTP cable
• 1x Offgridtec® 1m battery cable 35mm² M8 eyelets on both sides
• 1x Offgridtec set of 5 MEGA fuses 125A 70V for 48V systems
• 1x Pytes data cable battery to Victron GX 3.5m
• Pytes battery connection cable set V5a 2m M10 50mm² to Amphenol 10mm (1x or 2x depending on selection)

If electricity meter is selected

• 1x Victron VM-3P75CT Energy Meter
• 1x Victron 5m RJ45 UTP cable

The Multiplus device combination is preconfigured to suit the Pytes batteries.

Extended use of your backup system

The backup kit is supplied either with or without a Victron electricity meter and cable, although an energy meter is always required to set up an energy storage system.

With this electricity meter, you can carry out a grid-parallel installation and then monitor your energy consumption and control your energy costs. Thanks to phase compensation, you can even use the three-phase meter for single-phase systems. This means that seamless integration of decentralised energy sources and consumers into the existing power grid is no problem.

In order for an ESS to be taken into account in the pre-configuration, the meter must be purchased in advance or for the system!

The storage solution - Pytes V5a

The V5 alpha battery module from Pytes (MPN 110402100134) is equipped with the latest LiFePO4 cell technology and offers you a very long service life with high cycle stability. With a nominal voltage of 51.2V and a capacity of 5.12kWh, the battery provides you with outstanding performance under high loads. They are very easy to install and can be expanded up to 430kWh. In addition to these advantages, the home storage systems have intelligent monitoring and control functions that allow you to optimise your energy consumption and display it in real time.

Technical data

• Battery chemistry: LiFePO4
• Nominal voltage: 51.2 V
• Voltage range: 44.8 - 57.6 V
• Mains capacity: 100 Ah
• Nominal energy: 5.12 kWh
• Recommended charging current/discharging current: 75 A
• Max. continuous charge/discharge current: 100 A
• Peak charge/discharge: 150 A (15 sec.)
• Operating temperature range: -10°C - +55°C
• Heating system: 8-10°C/h
• Weight: 44 kg
• Dimensions: 440 x 530 x 140 mm

The electronic core - the Victron Multiplus-II device combination

The Multiplus-II is a high-end device combination from Victron Energy, consisting of a 48V battery charger, inverter and transfer switch. This combination combines the classic Multiplus components with an external current sensor and integrated anti-island function. This expands the PowerControl and PowerAssist functions to 50A and extends the potential range of use to energy storage system applications. The Multiplus is therefore ideal for use as a backup device in grid-connected and off-grid power supply systems.

• 3000W power with non-linear load
• 2400W continuous load - 6000W peak power
• for 48V battery voltage
• 32A transfer switch
• 35A battery charger
• Output voltage: 230 VAC, frequency: 50 Hz
• Maximum efficiency: 95
• Protection class: IP22

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

With the Cerbo GX MK2 communication centre, you can easily control and monitor your system. The flexible connection options maximise your system performance. Thanks to the Cerbo GX, 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.