Backup system with 3.5kWh Pylontech LiFePo4 storage and MultiPlus ii 48/5000 Victron Energy inverter 1-phase

The backup systems from Offgridtec are ideally suited for emergency power supply or for expanding an existing solar system. The systems include Pylontech Lithium-Ion batteries, a suitable MultiPlus-II inverter, and a Cerbo GX MK2 for system monitoring from Victron Energy. This ensures that you can maintain your energy supply even in the event of a power outage.

Thanks to the UPS function, the MultiPlus remains active even during a grid failure and takes over the supply for connected consumers. The switchover occurs so quickly (in less than 20 milliseconds) that uninterrupted operation of computers and other electronic devices is guaranteed.

Applications of the Offgridtec Backup Kit:

• Emergency power supply
• Off-grid solar systems (island systems)
• Retrofitting existing PV systems
• Grid-connected power supply
• Uninterruptible power supply (UPS) systems

What is included in the Offgridtec Backup System?

• Pylontech US3000C 3.5kWh LiFePO4 Battery (2x or 4x, depending on selection)
• 1x Victron MultiPlus-II 48/5000/70-50 230V Unit
• 1x Victron Lynx Distributor
• 1x Victron Cerbo GX MK2 Control Panel
• 1x Victron GX Touch 50 Display Panel for Cerbo GX
• 1x 1.8m VE.Can to Can-Bus BMS Type A Cable
• 1x 3m Victron RJ45 UTP Cable
• 1x 1m Offgridtec Battery Cable 50mm² with M8 Lugs
• 1x 200A 70V MEGA Fuse
• 1x Pylontech Battery Connection Cable Set

The MultiPlus unit is pre-configured for the Pylontech batteries.

Extended Use of Your Backup System

To establish an ESS (Energy Storage System) with the backup system, an energy meter with connection cable is required:

• Victron VM-3P75CT Energy Meter 3-Phase Meter 75A/phase
• 5m Victron RJ45 UTP Cable

With this energy meter, you can implement a grid-parallel installation and subsequently monitor your energy consumption and control your energy costs. Thanks to phase compensation, the 3-phase meter can also be operated for single-phase systems. This allows for seamless integration of decentralized energy sources and consumers into the existing power grid.

To ensure the ESS is considered in the pre-configuration, the meter must be purchased in advance or together with the system!

The Storage Solution – Pylontech US3000C Batteries

The US3000C storage solution is a lithium battery of the latest generation. It has been specifically designed to meet the high demands placed on backup storage solutions. Thanks to modern technology, the highest levels of safety and long service life are guaranteed even with regular deep discharges.

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

The Electronic Core – the Victron MultiPlus-II Unit

The MultiPlus-II is a high-end unit from Victron Energy, consisting of a 48V battery charger, inverter, and transfer switch. This combination merges the classic MultiPlus components with an external current sensor and integrated anti-islanding function. As a result, PowerControl and PowerAssist functions are extended to 50A, broadening its potential applications to energy storage system applications. Therefore, the MultiPlus can be ideally used as a backup device in grid-linked and off-grid systems for power supply.

• 5000W power at non-linear load – 4000W continuous power – 9000W peak power
• For 48V battery voltage
• 50A transfer switch
• 70A 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 center, you can easily control and monitor your system. Flexible connection options maximize your system's performance. System control is possible anywhere, thanks to the Cerbo GX MK2. With the GX Touch 50 display, you can keep track of all your system parameters and make changes quickly and easily.