Energy, whenever you need it.
With SUN-MASTER energy storage modules and the appropriate inverters, you become independent of rising energy costs. You gain planning security, save real money, and invest in a future-proof energy supply – a decision that combines comfort, economic efficiency, and sustainability.
Predictable Energy Costs
Reduce your dependence on price fluctuations in the electricity market.
Scalable with your energy needs
Expand according to consumption and location.
Highest Safety and Easy Installation
Plug & Play, LiFePO4 technology and robust HPL casing.
Made in Europe: Economical and Durable
10-year warranty, no long waiting times for products and spare parts thanks to local production.
Our energy storage consists of individual storage modules, making it expandable as needed. A reliable energy storage system is the heart of a modern photovoltaic installation. It ensures that your self-generated solar power is not lost, but is available exactly when you truly need it.
During the day, your PV system often produces more electricity than you can immediately consume. Instead of feeding this unused surplus into the grid, the SUN MASTER energy storage reliably stores the energy. As soon as the sun sets or consumption rises, it releases the stored electricity – cleanly, safely, and efficiently.
This significantly increases your self-consumption, lowers your electricity costs, and makes you much more independent of energy providers and rising prices. At the same time, you make an active contribution to a climate-friendly and future-proof energy supply.
A major advantage of our energy storage system is that the energy storage modules are highly scalable. We deliberately developed a single storage module that is both cost-effective to produce and can be combined almost infinitely to form large storage systems.
For example, two modules can be easily stacked – 30 kWh or 300 kWh in a minimal footprint.
Communication Hub
SUN-MASTER storage units communicate with the inverter via RS-485 or CAN-BUS.
In addition, the individual modules also exchange information with each other. The master module then transmits all relevant data to the inverter.
The result: All modules connected to a storage unit operate as a single large module – perfectly coordinated.
No problem: additional energy storage modules can be easily added. Additional storage units can be connected simply via our connection boxes. The system is also ideally suited for large-scale storage. Special clusters can hold up to 15 modules – equivalent to 225 kWh.
Multiple clusters can be operated in parallel, making even storage sizes of 1 MWh and above easily achievable.
For connecting inverters and SUN-MASTER energy storage modules.
For connecting inverters and SUN-MASTER energy storage modules.
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.
Thanks to the modular design, maximum operational reliability is thus ensured.
