UNIV FlexiStack battery storage systems are the ideal solution for your PV system. Depending on your requirements, the storage systems can be precisely matched to your actual energy consumption. Whether for industry, commerce, agriculture or for your own home, the UNIV FlexiStack series with 30 or 60 kW storage capacity offers the right solution for everyone. If you want to use your solar power efficiently in the long term, the UNIV FlexiStack series is a future-proof power storage system for PV systems.
The individual battery modules are simply stacked on top of each other, without the need for wall mounting or complex cabling. This makes the storage system particularly suitable for technical rooms, storage areas or commercial energy centers. And if demand increases, the system can be easily expanded.
Advantages at a glance
- 30 or 60 kWh storage capacity – flexibly expandable
- Stackable design – easy floor installation
- Over 8,000 charge cycles at 80 % discharge (DOD)
- Maintenance-free operation thanks to passive cooling
- Integrated battery management system (BMS)
- Communication interfaces: CAN / RS485, optional Bluetooth
- Protection class IP20 – for indoor use
- 10-year guarantee on the entire system
Areas of application
- Commercial enterprises with high electricity consumption
- Agricultural businesses with their own electricity supply
- Technical rooms in modular buildings
- Retrofittable storage solutions for existing PV systems
- Energy systems with a claim to self-sufficiency
UNIV FLEXISTACK variants
The UNIV FlexiStack ST30k with approx. 30 kWh capacity is suitable for small to medium-sized PV systems. The larger ST60k with around 60 kWh is ideal for industrial and commercial applications.
Involtis – Your partner in Austria
As an official provider in Austria, Involtis supports you in the selection, planning and integration of the right storage system. You not only receive a high-quality product, but also personal advice and service – directly on site.
UNIV-LV ST30k / ST60k (stackable)
| Parameters | ST30k | ST60k |
| Number of modules | 4 modules | 8 modules |
| Total capacity | 30.72 kWh | 61,44 kWh |
| Usable energy | 28.88 kWh | 57.75 kWh |
| Rated voltage | 51,2 V | 51,2 V |
| Capacity | 600 Ah | 1200 Ah |
| Recommended Charging/Discharging current | 300 A | 600 A |
| Dimensions (W×H×D) | 660 × 740 × 440 mm | 660 × 1360 × 440 mm |
| Weight | 268 kg | 516 kg |
| Installation | Stackable | Stackable |
| Protection class | IP20 | IP20 |
| Communication | CAN / RS485 | CAN / RS485 |
| Operating temperature | 0-55 °C (charging) / -20-60 °C (discharging) | 0-55 °C (charging) / -20-60 °C (discharging) |
| Service life | >8000 cycles @ 25 °C / 80 % DOD | >8000 cycles @ 25 °C / 80 % DOD |
| Guarantee | 10 years | 10 years |
| certificates | CE, UL 1973, UN38.3, MSDS | CE, UL 1973, UN38.3, MSDS |
