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Fronius Reserva

Energy storage

Experience freedom, security and efficiency in a perfectly designed complete system.

With capacities from 6.3 to 15.8 kWh with two to five modules, it adapts flexibly to your needs. Perfectly matched to Fronius hybrid inverters, it integrates seamlessly into your photovoltaic system. Your data remains secure because it is stored exclusively on European servers. The proven Fronius Service & Support is always on hand to provide fast and reliable assistance for your entire system.

One-stop-shop

Fronius now offers all the components for 24 hours of sun - a complete PV system from a single source. With the Fronius Reserva, we are adding a powerful battery to our portfolio that perfectly complements your energy system. Everything is ideally matched, saving you time and ensuring smooth processes. The optimal interaction of our devices ensures efficient and reliable operation. Service is also straightforward: a single point of contact is all you need. With the Solar.web app, you can keep an eye on all your Fronius devices, such as the Reserva, the GEN24 Plus hybrid inverter and the Wattpilot Flex wall box, without the need for additional third-party tools. Add to that the security of the Fronius warranty and the quality of a company with over 80 years of experience.

Maximum efficiency, maximum independence

Experience maximum independence with the Fronius Reserva! Thanks to DC coupling, the energy from your PV system is charged into the battery with almost no loss - for maximum efficiency and full power. The high-voltage technology optimises the cost-effectiveness of your system. Combined with the GEN24 Plus, you benefit from exceptional charge and discharge performance, making the most of even short windows of sunshine. With lithium iron phosphate cell chemistry, the Fronius Reserva is built to last and offers you reliable security.

European data security

With Fronius Reserva, you can keep an eye on your data at all times - safely and securely. Our Solar.web monitoring platform visualises all important information and complies with all data protection regulations. Your data is only stored on European servers.

Fronius adheres to the highest security standards: we meet the latest information security standards (ISO27001) and have regular security audits carried out by renowned companies. In addition, secure coding training is mandatory for our software developers to ensure the best possible protection for your data.

Fronius Reserva

Discover the highlights of the smart high-voltage battery

Additional information for installers

Proven Fronius Service & Support
Our support team provides full troubleshooting for the Fronius Reserva, with access to all system data. For other storage systems, manufacturer support is often required. With Fronius Reserva, everything is handled quickly and easily from one source. Support is available by phone in multiple languages and time zones, plus 24/7 via the Solar.SOS online tool.

Fronius GEN24 Plus


The heart of your PV system

 

With the Fronius GEN24 Plus you can have 24 hours of sun in your home. That's because the hybrid inverter allows you to connect a battery storage system, making you even more independent.

 

More about Fronius GEN24 Plus

Backup Controller & Switch

Backup power for every situation

With the Fronius Backup Controller & Backup Switch you can switch to full backup power generation either automatically or manually. These cost-effective switching components can be installed in the control cabinet to save space and eliminate the need for additional hardware such as switch boxes.

More about Fronius backup power

Solar.web

Everything under control

With our Fronius Solar.web monitoring tool, you can keep an eye on your PV system anytime, anywhere, and keep your energy transition optimally on track – easily and conveniently on your smartphone or on the web.

More about Fronius Solar.web

AI-based energy management 

The Fronius Energy Cost Assistant automatically supports you as a PV system owner with battery storage to improve your energy use. This allows you to get the most out of your storage system and also save on electricity costs. Thanks to advanced AI technology, the energy cost assistant continuously analyzes the expected PV production of your system, your energy consumption and the current electricity price and adapts the storage strategy accordingly. 

Find out more about the Energy Cost Assistant

Technical data & 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 %