Fronius Reserva

Your battery storage system for maximum independence

Fronius Reserva - Battery for solar energy

Self-sufficiency, safety, and efficiency—combined in one system

The Fronius Reserva turns your PV system into a complete solution – safe, efficient, and flexible. With capacities ranging from 6.3 to 15.8 kWh, the battery adapts perfectly to your requirements and impresses with its slim design, even in confined spaces. The durable and safe lithium iron phosphate technology ensures maximum operational reliability and longevity. The Fronius Reserva fits seamlessly into the Fronius ecosystem: in combination with a Fronius hybrid inverter, your PV system becomes capable of providing backup power – giving you the peace of mind that you can count on your own energy at all times. 

Fronius Reserva – battery storage for maximum independence

Our Fronius Reserva is a powerful high-voltage battery for your home. Thanks to DC coupling, solar energy is stored with virtually no loss – for maximum efficiency and full power, even during short periods of sunshine. With storage capacities ranging from 6.3 to 15.8 kWh (two to five modules), the Fronius Reserva adapts flexibly to your energy requirements. For larger applications, up to four battery towers can be combined, enabling a total capacity of up to 63 kWh. In combination with the Fronius GEN24 Plus or Verto Plus and switching components such as the Fronius Backup Controller or Backup Switch, the PV storage system provides a reliable backup power supply for the entire household. With secure technology, European data security, and perfect integration into the Fronius ecosystem, the Reserva is the ideal addition to your photovoltaic system. 

Fronius Reserva

Naturally safe – and durable

The Fronius Reserva relies on the safest cell chemistry on the market: lithium iron phosphate. It is thermally stable, non-flammable, and free of critical raw materials. A multi-stage protection system continuously monitors all relevant parameters and protects the battery at all times. With over 6,000 tested charging cycles and a robust design, the Fronius Reserva is built for a long service life.

Fronius Reserva - Battery for solar energy

Well-designed overall system with service advantages and growth potential.

One system – perfectly integrated
Our battery storage system is part of the sophisticated Fronius complete system. All components — from the storage system to the inverter to the wallbox — are optimally coordinated with each other. Commissioning is easy with the Solar.start app, without the need for additional software. This gives you a complete PV system, including warranty and support, directly from Fronius.
Service & Support – everything from a single source
With Fronius Reserva, you benefit from a comprehensive service concept: a single point of contact for the entire system — from the inverter to the battery storage. Thanks to direct system insights, our Fronius Support Team can provide fast and efficient assistance. In addition, our digital tools are available around the clock — for maximum security and minimal downtime.
Scalable, flexible, and powerful
The Fronius Reserva grows with your requirements: the battery storage system can be expanded at any time in 3.15 kWh increments – up to 15.8 kWh per battery tower. For larger amounts of energy, up to four towers can be operated in parallel. In combination with the GEN24 Plus, this allows for up to 63 kWh of storage capacity. The result: a scalable system that offers maximum flexibility – today and in the future.
One system – perfectly integrated
Our battery storage system is part of the sophisticated Fronius complete system. All components — from the storage system to the inverter to the wallbox — are optimally coordinated with each other. Commissioning is easy with the Solar.start app, without the need for additional software. This gives you a complete PV system, including warranty and support, directly from Fronius.
Service & Support – everything from a single source
With Fronius Reserva, you benefit from a comprehensive service concept: a single point of contact for the entire system — from the inverter to the battery storage. Thanks to direct system insights, our Fronius Support Team can provide fast and efficient assistance. In addition, our digital tools are available around the clock — for maximum security and minimal downtime.
Scalable, flexible, and powerful
The Fronius Reserva grows with your requirements: the battery storage system can be expanded at any time in 3.15 kWh increments – up to 15.8 kWh per battery tower. For larger amounts of energy, up to four towers can be operated in parallel. In combination with the GEN24 Plus, this allows for up to 63 kWh of storage capacity. The result: a scalable system that offers maximum flexibility – today and in the future.

AI-based energy management, perfect interaction with GEN24 Plus, and full control with Solar.web

Our PV dream team: Reserva & GEN24 Plus
Fronius Solar.web: One app, endless possibilities
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.

Fronius Reserva

Discover the highlights of the smart high-voltage battery

Technical data and downloads

Data Reserva 6.3 Reserva 9.5 Reserva 12.6  Reserva 15.8 
Usable capacity 6,31 kWh 9,47 kWh 12,63 kWh  15,79 kWh
Number of battery modules 2 3 4 5
Rated voltage 204,8 V 307,2 V 409,6 V 512 V
Voltage range 185,6 ~ 227,2 V 278,4 ~ 340,8 V 371,2 ~ 454,4 V 464 ~ 568 V
Maximum output current1 32
Battery cell chemistry  Lithium iron phosphate (LFP)
Parallel operation

up to 4 batteries
Dimensions (height x width x depth) 860 x 780 x 176 mm 1100 x 780 x 176 mm 1360 x 780 x 176 mm  1610 x 780 x 176 mm 
Total weight 86,6 kg 120 kg 153,5 kg 187 kg
Compatible inverters Fronius hybrid inverter2
Protection class IP65
Max. altitude above sea level  2000 m
Ambient temperature range3 -20 to +55°C 
Permissible humidity  5-95 %

 

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

2  Except for Fronius Symo Hybrid.

3  Depending on the temperature, the charging/discharging power may be limited

Downloads

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