Fronius Reserva Pro

Energy storage for high power demands

Fronius Reserva Pro

Energy independence for high energy consumption

The Fronius Reserva Pro is the ideal storage solution for large residential buildings, commercial businesses, and agricultural oparations where high energy requirements need to be reliably covered.

The powerful high-voltage battery for PV electricity not only supports high loads but also increases self-consumption while effectively reducing energy costs. In combination with the Fronius Verto Plus or GEN24 Plus hybrid inverters, your PV system also becomes capable of providing backup power and black start, allowing it to restart autonomously even without a grid power.

 

Made in Europe*

The Fronius Reserva Pro is produced within a European value chain: *both the battery cells and the modules are manufactured in Europe and meet the highest quality and safety standards. This ensures short delivery routes, stable availability, and funding opportunities. In Austria, the Reserva Pro qualifies for the "Made in Europe bonus." 

More capacity, more control

The Fronius Reserva Pro is the modular high-voltage battery storage system for increased energy requirements. Each tower consists of 3 to 8 modules and offers 12 to 32 kWh of usable capacity. By connecting up to four towers in parallel, the system can reach a total of up to 128 kWh. In combination with the Fronius Verto Plus hybrid inverter, efficient DC-coupling enables high charging and discharging power of up to 28.3 kW for large loads.

With the Fronius Warranty, you are assured of 10 years of consistently stable performance. Durable LFP cells and integrated protection mechanisms ensure smooth operation far beyond the warranty period. For particularly profitable and demand-driven operation, the AI-supported Fronius Energy Cost Assistant continuously analyzes PV yield, load, and electricity prices, optimizing the storage strategy accordingly.

Highlights

Flexibly scalable
Depending on your needs, the Reserva Pro offers a storage capacity of 12 to 32 kWh with 3 to 8 modules per tower – and can even be expanded to a maximum capacity of 128 kWh using up to four battery towers connected in parallel. The system grows flexibly with your energy requirements and is perfectly suited for large residential buildings, commercial businesses, and agricultural applications with high energy requirements and high starting currents.
Backup power and black-start capability
Even in the event of a power failure, the Fronius Reserva Pro provides reliable and secure power: thanks to its backup power and black-start capabilities, essential loads remain operational while the system restarts autonomously—as long as sufficient residual energy is available. This ensures that both cirtical processes and essential systems such as heat pumps, cooling and ventilation systems, and commercial machinery remain in continuous operation—keeping your business protected around the clock. Ideal for all environments where energy supply security is a top priority.
AI-supported energy management
The Fronius Energy Cost Assistant uses modern AI algorithms to continuously analyze your PV yield, energy consumption, and current electricity prices, and optimally adapts the storage strategy accordingly. This allows you to use your PV system and battery storage with high profitability in the long term and save significantly on energy costs – without any additional hardware.
Complete Fronius system integration
From commissioning and monitoring to intelligent energy management: Our Fronius Reserva Pro can be automatically commissioned with Fronius hybrid inverters. Our digital tools, such as Fronius Solar.web and our Energy Cost Assistant, enable the seamless integration of the battery storage system into the Fronius ecosystem.
Flexibly scalable
Depending on your needs, the Reserva Pro offers a storage capacity of 12 to 32 kWh with 3 to 8 modules per tower – and can even be expanded to a maximum capacity of 128 kWh using up to four battery towers connected in parallel. The system grows flexibly with your energy requirements and is perfectly suited for large residential buildings, commercial businesses, and agricultural applications with high energy requirements and high starting currents.
Backup power and black-start capability
Even in the event of a power failure, the Fronius Reserva Pro provides reliable and secure power: thanks to its backup power and black-start capabilities, essential loads remain operational while the system restarts autonomously—as long as sufficient residual energy is available. This ensures that both cirtical processes and essential systems such as heat pumps, cooling and ventilation systems, and commercial machinery remain in continuous operation—keeping your business protected around the clock. Ideal for all environments where energy supply security is a top priority.
AI-supported energy management
The Fronius Energy Cost Assistant uses modern AI algorithms to continuously analyze your PV yield, energy consumption, and current electricity prices, and optimally adapts the storage strategy accordingly. This allows you to use your PV system and battery storage with high profitability in the long term and save significantly on energy costs – without any additional hardware.
Complete Fronius system integration
From commissioning and monitoring to intelligent energy management: Our Fronius Reserva Pro can be automatically commissioned with Fronius hybrid inverters. Our digital tools, such as Fronius Solar.web and our Energy Cost Assistant, enable the seamless integration of the battery storage system into the Fronius ecosystem.

Fronius Reserva Pro

Discover the highlights of the smart high-voltage battery:

Everything from a single source

The perfect combination: Reserva Pro & Verto Plus
Fronius Solar.web: One app, everything at a glance
AI-based energy management
The Fronius Energy Cost Assistant automatically optimizes your energy usage, reduces electricity costs, and uses AI to adapt the storage strategy to PV yield, consumption, and electricity prices.

Technical Data and Downloads

Data Reserva Pro 12.0 Reserva Pro 16.0 Reserva Pro 20.0  Reserva Pro 24.0 Reserva Pro 28.0 Reserva Pro 32.0
Usable energy 11,9 kWh 15,9 kWh 19,9 kWh  23,9 kWh 27,9 kWh 31,9 kWh
Number of battery modules 3 4 5 6 7 8
Nominal voltage 212,52 V 283,36 V 354,2 V 425,04 V 495,88 V 566,72 V
Operating voltage range 165 ~ 240,9 V 220 ~ 321,2 V 275 ~ 401,5 V 330 ~ 481,8 V 385 ~ 562,1 V  440 ~ 642,4 V
Maximum output current1 50 A    
Battery cell chemistry Lithium iron phosphate (LFP)    
Parallel operation

Up to 4 batteries

    
Dimensions (Height x Width x Depth) 775 x 579 x 449 mm 935 x 579 x 449 mm 1.095 x 579 x 449 mm  1.255 x 579 x 449 mm   1.415 x 579 x 449 mm  1.575 x 579 x 449 mm
Weight 126 kg 162 kg 198 kg 234 kg  270 kg  306 kg
Compatible inverters Fronius Primo GEN24 Plus, Symo GEN24 Plus & Verto Plus
Ingress protection (IP) rating IP65
Max. altitude above sea level 2.000 m
Ambient temperature range² -20 bis +50°C 
Permissible humidity 5-95 %
Installation Indoor and protected outdoor areas
DC connection technology Stäubli MC4 Evo Stor
Certificates and compliance with standards VDE2510-50 / IEC 62619:2022 / IEC62040-1 / CE / RCM / UN38.3
Interfaces Modbus (RS485) 
Warranty 10 years (80% SOH)

1 The charging and discharging current is limited by the inverter.

2 Depending on the temperature, the charging/discharging capacity may be limited.

Downloads

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