SolaX S51 battery set 20.4 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 SolaX S51 (TSYS-HS51) series is the manufacturer's latest high-voltage (HV) battery system, developed for residential and small commercial energy storage applications.
The system has a modular, floor-standing design and offers advanced safety features, including an aerosol fire suppression unit and optional cell optimizer technology.
Available versions:
- SolaX S51 – 15.3 kWh
- SolaX S51 – 20.4 kWh
- SolaX S51 – 25.5 kWh
- SolaX S51 – 30.6 kWh
SolaX S51 systems are built from 5.1 kWh modules, which connect cable-free by stacking. The modules are connected in series to form a high-voltage unit, with a total capacity ranging from 15.3 kWh to 30.6 kWh.
The central unit of the system is the TBMS-S51-8 control module, which monitors cell status in real-time, automatically balances charging, and transmits data to the inverter via CAN + RS485 communication.
The S51 series features an active safety system: the aerosol fire suppression module responds quickly and precisely in case of overheating or short circuit.
The LFP cell technology, 90% Depth of Discharge (DoD), and over 6000 cycle life guarantee long-term stable operation. The built-in battery heating technology allows operation down to –30 °C, making the system reliable in cold climates.
The TSYS-HS51 Optimizer version includes further enhancements:
– Automatic cell balancing within 3 hours in case of large capacity differences,
– Up to 10% increase in lifespan through efficient energy management,
– Support for mixed use of old and new modules, without energy loss.
With its compact, stackable housing design and IP66 protection, the S51 is suitable for both outdoor and indoor installation.
The system handles max. 70 A charging and discharging current and is compatible with SolaX hybrid inverters (X3 Hybrid, X3 MEG, X3 Fit, X3 Pro).
- Available capacities: 15.3 / 20.4 / 25.5 / 30.6 kWh
- 5.1 kWh per module, expandable up to 12 modules
- Aerosol fire suppression unit for cell-level protection
- Optional Optimizer version: 10% lifespan increase, 3-hour balancing
- CAN + RS485 communication, compatible with SolaX inverters
- Battery heating function, operates from –30 °C to +53 °C
- IP66 protection, for outdoor and indoor installation
- Cable-free, stackable modules, quick installation
- High-voltage architecture, 102–307 V voltage range
- LFP cells, 90% DoD, > 6000 cycles, 10-year warranty
- Certifications: IEC62619, IEC62040, VDE 2510, UN38.3
The SolaX S51 series is the manufacturer's current top-of-the-line high-voltage energy storage system. The aerosol fire protection, optional cell optimizer technology, and the heating system operating down to –30 °C together make this model an exceptionally safe, durable, and future-proof solution for professional energy storage.
| Névleges kapacitás (kWh) | 20.4 kWh |
|---|---|
| Hasznosítható energia | 18.3 kWh |
| Csúcsteljesítmény | 10.8 kW |
| Max. töltőáram | 60 A |
| Max. kisütési áram | 70 A |
| Névleges feszültség | 204.8 V |
| Működési feszültségtartomány | 170 – 232 V |
| IP védelem | IP66 |
| Működési hőmérséklet | -20 - +53 °C |
| Méret | 600 x 957 x 376 mm |
| Tömeg | 204 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.
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