Fronius Reserva Pro 24.0 23.88 Usable Capacity 24 kWh (6 modules à 3.98 kWh + 1 Reserva Pro BMS + plinth)
€ 8.806,68 exkl. USt.
Fronius Reserva Pro 24.0 23.88 Usable Capacity 24 kWh (6 modules à 3.98 kWh + 1 Reserva Pro BMS + plinth) 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
Pro 16.015.9 kWh4 Modules
Pro 20.019.9 kWh5 Modules
Pro 24.023.9 kWh6 Modules Current
Pro 28.027.9 kWh7 Modules
Pro 32.031.9 kWh8 Modules
Prices include VAT, current daily prices from the shop. All stages consist of the same modules – later upgrading is possible at any time.
Advantages at a glance
Modularly expandable
Composed of 6 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 widely 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 required.
High-voltage technology
425.04 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 White List of the EAG processing office and that the bonus is already applied for at the time of application. Storage units are also only subsidized in conjunction with a newly built or expanded PV system. Non-binding information, as of August 2026. Subsidy rates, conditions and product listings are subject to change at any time – without guarantee and without claim to a funding commitment. Binding information is exclusively provided by the EAG processing office.
Technical data – Reserva Pro 24.0
| Parameter | Value |
|---|---|
| Usable energy | 23.9 kWh |
| Number of battery modules | 6 × 3.98 kWh |
| Nominal voltage | 425.04 V |
| Voltage range | 330 – 481.8 V |
| Maximum output current | 50 A |
| Battery cell chemistry | Lithium Iron Phosphate (LFP) |
| Dimensions (H × W × D) | 1,255 × 579 × 449 mm |
| Weight | 234 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 |
| Mounting location | Indoor and sheltered outdoor area |
| DC connection technology | Stäubli MC4 Evo Stor |
| Interfaces | Modbus (RS485) |
| Compatible inverters | Fronius GEN24 Plus and Verto Plus |
Certificates & Standard 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 a large number of charging cycles. For a storage unit that is charged and discharged daily for years and is located in a residential building, this is the safest common design.
How much do 23.9 kWh bring me in everyday life?
23.9 kWh are designed for 8,000 to 10,000 kWh annual consumption – for example, a larger house with a heat pump and electric car or a small commercial business. Even on cloudy days, this leaves enough reserve for the night.
Is there funding for the storage system?
The EAG investment subsidy funds 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 subsidized, only in conjunction with a new or expanded PV system. All information is non-binding – the EAG processing office provides binding information.
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. In addition, up to 4 towers can be operated in parallel, totaling up to 127.6 kWh. So you start small and grow with it when a heat pump or electric car is added.
Can the storage system be placed outdoors?
The Reserva Pro is IP65 protected and approved for indoor and sheltered outdoor use, 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 a canopy or in a carport.
Who is Fronius?
Fronius International is an Austrian family business based in Wels, Upper Austria, founded in 1945. In addition to welding technology and battery charging systems, solar electronics is one of the 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 throughout Austria and install on request. For orders over €5,000, shipping within Austria is free. For questions about the design, we are happy to advise you personally.
€ 8.806,68 exkl. USt.
Fronius Reserva Pro 24.0 23.88 Usable Capacity 24 kWh (6 modules à 3.98 kWh + 1 Reserva Pro BMS + plinth) is backordered and will ship as soon as it is back in stock.