Open-system battery storage retrofit system for maximum energy independence
The Voltaik battery storage retrofit kit, with a scalable capacity from 5.12 kWh to 71.7 kWh, is a powerful, complete solution for retrofitting existing photovoltaic systems . The system is intentionally designed to be system-independent and is suitable for virtually any existing PV system – regardless of the existing inverter or manufacturer.
At the heart of the system is the combination of the robust Pytes V5a LiFePO4 battery storage system and the proven Victron MultiPlus-II battery and emergency power inverter. This architecture enables reliable emergency power supply , grid-connected operation, and optional off-grid operation . The goal is maximum independence from the energy supplier while maintaining high operational reliability.
Why this battery storage retrofit kit?
- True emergency power supply with uninterruptible switching in under 20 milliseconds
- Robust and durable LiFePO4 storage technology with over 6,000 cycles
- Victron MultiPlus-II combines inverter, charger and transfer switch
- 3-phase system for stable power supply even under high loads
- Flexibly scalable from small households to large applications
System design and technical features
- Storage capacity modularly expandable from 5.12 kWh to 71.7 kWh
- Battery system voltage 48 volts DC
- 3-phase inverter architecture
- AC-side integration independent of the existing PV inverter
- Suitable for grid-connected and off-grid systems
Monitoring and system control
The integrated Victron monitoring system with Cerbo GX MK2 and GX Touch 50 enables clear, real-time system monitoring. Operating data, charge levels, and energy flows can be accessed locally as well as via web and app. Remote maintenance and system analysis are also possible.
Scope of delivery (excerpt)
- Pytes E-Box-48100R-C 100Ah 51V LiFePO4 Battery (12 or 14x depending on selection)
- 3x Victron MultiPlus-II 48/10000/140-100/100 230V
- 1x Victron Energy Lynx Distributor (M8)
- 1x Victron Energy Lynx Power In (M8)
- 1x 3m Victron Energy RJ45 UTP cable
- 6x Voltaic 1m battery cable 50mm²
- 1x Victron Cerbo GX MK2 Communication Center System Monitoring
- 1x Victron GX Touch 50 display panel for Cerbo GX
- 2x set of 5 Voltaic MEGA fuses 200A 70A
- 1x Pytes data cable battery to Victron inverter MultiPlus 2 3.5m
- 6x Pytes battery inverter power cable 2m, positive
- 6x Pytes battery inverter power cable 2m, negative
- 2x 0.9m Victron RJ45 UTP cable
- 1x Victron MK3-USB VE.Bus to USB interface
Typical areas of application
- Retrofitting existing photovoltaic systems
- Emergency power supply during power outages
- Self-sufficient energy supply and island grids
- Residential buildings with heat pumps or e-mobility
- Commerce, agriculture and IT infrastructure
Assembly and commissioning
Voltaik.shop offers professional installation, wiring, and commissioning of the system upon request. This ensures that your battery storage system is optimally configured, safely operated, and fully integrated into your energy system.
The Voltaik battery storage retrofit kit is a future-proof, scalable and system-open solution for anyone who wants to flexibly expand their photovoltaic system and secure their energy supply in the long term.
