Fronius Reserve battery set 15.8 kWh
Payment and delivery
Payment and delivery
Payment
You can pay for your order by bank transfer, in HUF or EUR. Cash on delivery is available for orders up to HUF 500,000 with a handling fee of HUF 4,990. For orders over HUF 500,000, only bank transfer is possible. We will send you a proforma invoice by email, which will include the details required for the transfer.
Delivery
We deliver your orders throughout Hungary with the help of our reliable logistics partners or our own transport. Personal collection is possible by prior arrangement. The shipping cost is determined based on the size, weight and type of the ordered product:
- Small package: HUF 3,790
- Large package: HUF 6,490
- Heat pump: free delivery
- Solar panel and battery: individual shipping fee (based on size, weight and quantity)
Product description
Product description
The Fronius Reserva is a high-voltage, DC-coupled energy storage system specifically developed to work with Fronius hybrid inverters. The system is based on the manufacturer's proprietary lithium iron phosphate (LFP) cell technology and offers outstanding data security and service support, in addition to European manufacturing quality.
Available versions:
- Fronius Reserva – 6.3 kWh (2 modules)
- Fronius Reserva – 9.5 kWh (3 modules)
- Fronius Reserva – 12.6 kWh (4 modules)
- Fronius Reserva – 15.8 kWh (5 modules)
The Reserva series is a modular system, allowing the desired capacity to be configured by combining 2 to 5 battery modules. Each module can be expanded in parallel by connecting up to 4 battery towers, enabling the construction of larger systems.
Lithium iron phosphate (LFP) cells ensure stable and safe energy storage with a lifespan of over 6000 charging cycles. The system connects to the Fronius hybrid inverter via RS485 communication and stores energy directly on the DC side, thereby avoiding AC/DC conversion losses.
Reserva batteries are IP65 rated, allowing them to be installed indoors and in protected outdoor environments. The compact housing design, 772 mm wide and only 176 mm deep, provides a wall-mountable and maintenance-free solution. The system's operating temperature range is between –20 °C and +55 °C, allowing for reliable operation even under extreme environmental conditions.
- Available capacities: 6.3 / 9.5 / 12.6 / 15.8 kWh
- Modular system: 2–5 LFP cell modules
- Lithium iron phosphate (LFP) cell technology, pouch cell design
- DC-coupled energy storage – minimal conversion loss
- Compatible with Fronius hybrid inverters (e.g., GEN24 Plus)
- RS485 communication between inverter and BMS
- IP65 protection, for indoor and protected outdoor installation
- –20 °C … +55 °C operating range
- Floor or wall mounted, between 86–187 kg (depending on module configuration)
- Max. 32 A DC current, limited by the inverter
- Multiple systems can be paralleled, up to 4 battery towers
- 6000+ cycles, 10-year warranty
- Certifications: IEC62619:2022, CE, VDE 2510-50, IEC62477-1, UN38.3
The Fronius Reserva series is a highly efficient, DC-coupled energy storage solution that perfectly integrates with Fronius hybrid inverters. Its modular design, wide temperature range, and maintenance-free construction make it an ideal choice for residential and smaller commercial PV systems where long-term reliability and easy integration are important.
| Névleges kapacitás (kWh) | 15.8 kWh |
|---|---|
| Hasznosítható energia | 15.79 kWh |
| Max. töltőáram | 32 A |
| Max. kisütési áram | 32 A |
| Névleges feszültség | 512 V |
| Működési feszültségtartomány | 464 – 568 V |
| IP védelem | IP65 |
| Működési hőmérséklet | -20 to +55 °C |
| Méret | 772 × 1640 × 176 mm |
| Tömeg | 187 kg |
| Garancia | 10 years |
Do you have a question?
View frequently asked questions or contact us.
How do I choose the right battery?
How do I choose the right battery?
First, always check if the battery is compatible with your inverter, as not all systems work with all manufacturers. This information is usually found in the inverter's technical data sheet.
Next, you should consider what storage capacity you need (kWh). This depends on how much energy you want to store and which appliances you wish to operate in case of a power outage. If you are considering future expansion, it is advisable to choose a modularly expandable system.
An important distinction is that some systems operate in a closed ecosystem (e.g., only compatible with batteries from their own manufacturer), while other inverters can be connected to products from multiple manufacturers, thus providing greater flexibility.
If you are unsure about your choice, it is worth seeking expert advice – this can help avoid compatibility issues and unnecessary costs.
How do inverter types differ?
How do inverter types differ?
Inverters differ in several aspects, depending on the system and requirements for which they are used.
1. Grid-tied (on-grid) inverter
This is the most common type. It feeds the generated energy directly back into the grid and does not operate during a power outage.
2. Hybrid inverter
It is also capable of managing batteries, so the generated energy can be stored. In the event of a power outage, certain systems can also provide backup power.
3. Off-grid inverter
Completely independent of the grid. Used in places where there is no electrical grid (e.g., holiday homes, farmsteads).
4. By phase: single-phase and three-phase
Single-phase: for smaller systems (family homes, lower consumption)
Three-phase: for larger systems, with balanced load distribution
5. String inverter vs. optimized system
String inverter: several panels connected in series
Optimized system: individual optimizers per panel, better performance in case of shading
What happens in a power outage?
What happens in a power outage?
In the event of a power outage, the system's operation depends on the inverter type.
If the inverter has a backup (off-grid) function, it automatically switches to battery mode during a power outage, allowing selected consumers (e.g., lighting, refrigerator, essential appliances) to continue operating.
If the inverter does not support this function, the system will shut down in the event of a power outage. This means there will be no power supply even if the solar panels are generating electricity, as grid-tied inverters do not operate without grid voltage for safety reasons.
Therefore, if continuous power supply is important, it is advisable to choose an inverter-battery system that supports backup operation.
What is the warranty on the batteries?
What is the warranty on the batteries?
Battery warranties vary by manufacturer and type.
In most cases, a 5–10 year manufacturer's warranty is provided, which for some models may also be tied to a specific number of charging cycles or performance.
The exact warranty conditions are specified for each product, so before purchasing, you can clearly see the duration and conditions under which the warranty is valid.
If you have any questions regarding the warranty, we will help you navigate the details to ensure you choose the system that best suits your needs.
What happens if the battery fails?
What happens if the battery fails?
As a first step, it's worth checking if the problem is indeed with the device itself, as in many cases, the issue lies with settings, communication, or system connection, rather than the battery.
If the fault is verifiably linked to the product, investigation and resolution will be carried out within the framework of warranty administration, involving the manufacturer or distributor.
If needed, we can assist in initiating and guiding this process to ensure troubleshooting is as quick and smooth as possible.
Professional Articles and Guides
Deye Inverter Buying Guide – Types and Advantages
We help you navigate the world of Deye inverters: types, advantages, and practical advice all in one place.
Read more
Introducing the Huawei SUN2000-(5K–12K)-MAP0 Inverter Family
Learn about Huawei's hybrid inverter family: performance, smart features, battery management, and practical information.
Read more
15 most common solar panel system mistakes to avoid
Professional and practical tips for error-free solar panel installation. We help you avoid maintenance and design problems.
Read more