Fronius Reserva Pro 12.0 11.94 Usable Capacity 12 kWh (3 modules each 3.98kWh + 1 Reserva Pro BMS + Base)
€ 5.027,58 exkl. USt.
Fronius Reserva Pro 12.0 11.94 Usable Capacity 12 kWh (3 modules each 3.98kWh + 1 Reserva Pro BMS + Base) is backordered and will ship as soon as it is back in stock.
All Expansion Stages at a Glance
Pro 12.011.9 kWh3 Modules Current
Pro 16.015.9 kWh4 Modules
Pro 20.019.9 kWh5 Modules
Pro 24.023.9 kWh6 Modules
Pro 28.027.9 kWh7 Modules
Pro 32.031.9 kWh8 Modules
Prices incl. VAT, daily updated from the shop. All stages consist of the same modules – later upgrading is possible at any time.
Advantages at a Glance
Modularly Expandable
Built from 3 modules, expandable in the tower up to 8 modules (31.9 kWh). Up to 4 towers in parallel result in 127.6 kWh.
LFP Cell Chemistry
Lithium iron phosphate is thermally stable and cobalt-free – the safest cell chemistry used in homes.
IP65 – Also Outdoors
Indoor and sheltered outdoor areas, -20 to +50 °C, up to 2,000 m above sea level. No separate technical room needed.
High-Voltage Technology
212.52 V nominal voltage and 50 A maximum output current – fewer conversion losses than with low-voltage systems.
10-Year Warranty
Fronius guarantees 80% of the originally usable capacity (State of Health) after 10 years.
Made in Europe
Fronius develops and produces in Upper Austria – relevant for the "Made in Europe" bonus of the EAG funding.
Warranty & Longevity
Funding in Austria
A prerequisite is that the product is listed on the EAG processing office's White List and that the bonus is already applied for with the initial application. Additionally, storage systems are only subsidized in conjunction with a newly installed or expanded PV system. Non-binding information, as of August 2026. Subsidy rates, conditions, and product listings may change at any time – no guarantee and no claim to a funding commitment. Binding information is exclusively provided by the EAG processing office.
Technical Data – Reserva Pro 12.0
| Parameter | Value |
|---|---|
| Usable energy | 11.9 kWh |
| Number of battery modules | 3 × 3.98 kWh |
| Nominal voltage | 212.52 V |
| Voltage range | 165 – 240.9 V |
| Maximum output current | 50 A |
| Battery cell chemistry | Lithium Iron Phosphate (LFP) |
| Dimensions (H × W × D) | 775 × 579 × 449 mm |
| Weight | 126 kg |
System & Operating Conditions
| Parameter | Value |
|---|---|
| Parallel operation | up to 4 batteries (max. 127.6 kWh) |
| Protection class / Safety class | IP65 / II |
| Ambient temperature | −20 to +50 °C |
| Permissible humidity | 5 – 95 % |
| Maximum altitude above sea level | 2,000 m |
| Installation location | Indoor and sheltered outdoor areas |
| DC connection technology | Stäubli MC4 Evo Stor |
| Interfaces | Modbus (RS485) |
| Compatible inverters | Fronius GEN24 Plus and Verto Plus |
Certificates & Standards Compliance
Frequently Asked Questions
What does LFP mean and why this cell chemistry?
LFP stands for Lithium Iron Phosphate. These cells do not contain cobalt, are significantly more thermally stable than NMC cells, and can withstand many charging cycles. For a storage unit that is charged and discharged daily for years and located in a residential building, this is the safest common design.
How much do 11.9 kWh bring me in everyday life?
An average Austrian household consumes about 4,500 kWh per year, which is about 12 kWh per day. With 11.9 kWh of usable energy, you can typically bridge an entire night and morning. Realistically, this can cover 60 to 80% of your own consumption from your own system.
Is there funding for the storage system?
The EAG investment subsidy will fund electricity storage systems in 2026 with €150 per kWh of usable capacity, with a Made-in-Europe bonus of €165 per kWh. Up to 50 kWh and a maximum of 30% of the investment costs are funded, only in conjunction with a new or expanded PV system. All information is non-binding – binding information is provided by the EAG processing office.
Can I expand the storage system later?
Yes. A tower can hold up to 8 modules of 3.98 kWh each, i.e., up to 31.9 kWh. Furthermore, up to 4 towers can be operated in parallel, totaling up to 127.6 kWh. So you can start small and grow as you add a heat pump or electric car.
Can the storage system be placed outdoors?
The Reserva Pro is IP65 protected and approved for indoor use and sheltered outdoor areas, at -20 to +50 °C and up to 2,000 m above sea level. Sheltered means: no continuous direct rain and no blazing sun, for example under an overhang or in a carport.
Who is Fronius?
Fronius International is an Austrian family-owned company based in Wels, Upper Austria, founded in 1945. In addition to welding technology and battery charging systems, solar electronics is one of its three divisions. Development and production take place in Austria.
Where can I buy the Fronius Reserva Pro in Austria?
At SOLARVIC on solarvic.at – as a specialist dealer and installer, we deliver nationwide in Austria and offer installation services upon request. For orders over €5,000, shipping within Austria is free. For questions about design, we would be happy to advise you personally.
€ 5.027,58 exkl. USt.
Fronius Reserva Pro 12.0 11.94 Usable Capacity 12 kWh (3 modules each 3.98kWh + 1 Reserva Pro BMS + Base) is backordered and will ship as soon as it is back in stock.