

Fronius has launched its Reserva Pro battery storage unit with a storage capacity range of 12 kWh to 32 kWh
This capacity can be scaled up to 128 kWh by connecting 4 units in parallel
Aligning with Europe’s cybersecurity requirements, the operational data of these systems is stored in a European server
Austria-based solar-plus-storage solutions maker Fronius International GmbH has launched its Reserva Pro vertically stacked battery unit.
Developed for commercial & industrial (C&I) and large residential applications, this system is equipped with lithium iron phosphate (LFP) based battery units. The company says the system looks like a ‘tower’ and offers storage capacities ranging from 12 kWh to 32 kWh. It can be coupled with the company’s Verto Plus and GEN24 Plus series hybrid inverters via a built-in DC/DC converter. Without sharing data on PV array capacities, the company states this storage system supports a power output of up to 28.3 kW. In terms of scalability, its storage capacity can be scaled up to 128 kWh by connecting 4 ‘towers’ in parallel.
When combined with a hybrid inverter, it provides emergency backup during grid outages for a certain duration. According to the company, this switch is done through an intermediate Fronius Backup Controller. It also has black-start capability, useful during a complete grid shutdown with no reference to voltage and frequency. Unlike backup, which is activated during grid outages and provides emergency support for a short duration, this function independently forms a local grid. In emergency backup mode, the battery is fully discharged at a certain point, while the black-start function enables continuous operation of C&I loads, even without utility grid support. The latter can also form a microgrid by integrating PV, a diesel generator, and other energy sources.
Noting this latest energy-independence trend, Harald Scherleitner, CSO of Fronius International, said that energy independence is increasingly becoming a priority for users with higher energy demands, and the latest product is being developed to extend backup and self-sufficiency capabilities to these segments.
In addition to the hardware, the system includes cybersecurity provisions. Aligning with Europe’s data protection requirements, the system and user data are stored on servers located within Europe, Fronius added.