SUN-MASTER at SOLARSOLUTION Düsseldorf

THE SUN-MASTER KNOWLEDGE BLOG

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A LOOK INSIDE THE ENERGY STORAGE MODULE

Experience SUN-MASTER Live with Transparent, Hands-On Technology

Exclusive Insight: Our storage unit in a Plexiglas model – Transparency, technology, and innovation up close at SOLARSOLUTION.

At the SOLARSOLUTION trade fair in Düsseldorf, SUN-MASTER presents a special highlight:
An energy storage module, built into a Plexiglas model, revealing its technology and construction. Visit us on December 3 and 4, 2025, Stand L14, and experience how state-of-the-art storage technology works – understandable, tangible, and innovative.

SOLARSOLUTION Düsseldorf is an annual meeting point for experts from the solar and energy storage industry. This year, SUN-MASTER is represented with a special exhibition stand: Instead of a closed storage unit, we are showcasing a transparent Plexiglas model of our SUN-MASTER energy storage module. This allows us to make understandable what usually remains hidden – switching modules, construction, and airflow.

Why a Plexiglas Model?

Revealing the Technology:
Visitors can see how our modules are constructed and how the components are arranged.

Making Hidden Innovations Visible:
“Air in the module,” modular expandability, and consistency in retrofitting become directly tangible.

Building Trust:
Those who can see product safety and quality also understand why spare and replacement parts for our European products are quickly available.

Benefits for You as a Visitor and Potential Customer

Our experts will be on site to explain the construction, module function, cooling, and fail-safety – you can see how the storage unit continues to operate even if a module fails.

Many storage units from China are closed, compactly designed – hardly modular, with limited retrofitting options and difficult spare part supply. With us, retrofitting with CNC-manufactured parts and replacement modules is possible, and costs and logistics remain manageable.

Relevance for Sensitive User Groups
Commercial enterprises, hospitals, production facilities – reliability and availability are paramount here. Our modular technology ensures that the power supply is maintained even if individual modules fail.

Practical Examples and Perspectives

Imagine an operation that relies on production lines – a module fails, but instead of a complete shutdown, there is only a slight reduction in performance while the system continues to run. Or a hospital where power-critical wards must be continuously supplied – our technology offers planning security here.

Conclusion: SOLARSOLUTION Düsseldorf is the perfect opportunity to experience SUN-MASTER differently: not just as a manufacturer, but as a technology provider that openly demonstrates what it offers. Visit us on December 3 & 4, 2025, Stand L14, and take a look inside our Plexiglas storage module – innovation, more transparent than ever before.

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Frequently Asked Questions.

An overview.

Where Can the Energy Storage System be Placed and how is it Installed?

Our energy storage system is usually installed in a basement, cellar vault, or a
suitable storage room. For maximum safety – especially when multiple
modules are stacked on top of each other – our technicians perform a professional wall mounting.

The modules are delivered by freight forwarder or by our own team. Thanks to integrated rollers, they can be easily moved to the installation site, after which the rollers are removed. Alternatively, the modules can also be safely lifted using the integrated eyelet system. For stacking the energy storage modules, the eyelets can also be removed.

Our energy storage modules utilize particularly safe 48V technology. The installed LiFePO₄ cells are considered extremely reliable and, unlike conventional lithium-ion batteries, cannot self-ignite. This means for you: maximum safety with full performance.

In the front area of the storage system, where the electronics such as the BMS and wiring are located, our engineers have deliberately planned additional space. This ensures good ventilation and protects the components from overheating. At the same time, we remain flexible: In case of future adjustments – for example, due to new legal requirements or new state-of-the-art components – additional components can be easily integrated.

Fundamentally, our energy storage systems are very durable and low-maintenance. However, if a malfunction does occur, the failure is usually attributable to the electronics—specifically the BMS (Battery Management System) or the communication interfaces (RS485 / CAN bus). These components are subjected to greater stress than the actual LiFePO₄ cells, which are extremely robust and long-lasting.
The typical spare part costs per module are approximately:

BMS: €200–250
Communication Board: €250–300
LiFePO₄ Cell Unit: €150–200

Briefly explained:
BMS (Battery Management System): Monitors and protects the cells, ensures uniform charging and discharging.
RS485 / CAN-BUS: Enables communication between the storage system and the inverter and master module.

All components in the energy storage system are securely mounted and thus protected from vibrations. The stable aluminum frame provides additional stability, while the outer casing made of HPL panels offers particularly robust protection.

HPL (High Pressure Laminate) is a high-pressure laminate characterized by its extreme robustness: It is shock- and scratch-resistant, withstands moisture and UV radiation, and is flame-retardant (fire protection class B1). Thus, the internal components are reliably protected against external environmental influences such as heat, moisture, or mechanical stress – and the storage system remains operational long-term.

LiFePO₄ cells are considered particularly safe and are extremely rarely self-igniting. Should a fire nevertheless occur internally, it would not spread outwards: LiFePO₄ cells only ignite at around 200-250 °C, while the robust HPL panels of the outer casing are only flammable from approximately 400-500 °C. This means that even in extreme cases, fire spread is ruled out.
Even after installation, we are reliably there for you. Should components ever fail, you can reach us by phone from Monday to Friday between 8:00 AM and 5:00 PM at +49 39724-268000 or anytime by email at info@sun-master.de. Our nationwide installation service ensures that defective electronic components or individual cells are replaced directly on-site within three working days – quickly, professionally, and reliably.
Our energy storage systems usually consist of several modules. If a single module fails, the overall storage system remains functional – only the performance is reduced.
A storage system with 5 modules, each with 16 kWh capacity and 8 kW power, results in a total of 80 kWh capacity and 40 kW power. If one module fails, 64 kWh capacity and 32 kW power are still available. The storage system therefore continues to operate reliably, albeit with slightly reduced performance.
  • Production Facilities & Machine Halls (24/7 Operation): Even if a module fails, the energy supply remains stable, allowing machines to continue running. Production downtimes are thus reliably avoided.
  • Hospitals & Emergency Power Systems: In safety-critical areas, a continuous supply is crucial. Even if a module fails, the power supply remains guaranteed – an important factor for life support systems and sensitive medical equipment.

Thanks to the modular design, maximum operational reliability is thus ensured.

A possible failure is displayed directly in the SUN-MASTER App. There, you can not only monitor the status of your storage system, but also control yields and consumption, optimize self-consumption, and intelligently manage your energy flows.
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