Deye GB-S10K / S12K / S15K / S20K-EU Three-Phase Hybrid Energy Storage System

The Deye GB-S10K, S12K, S15K, and S20K-EU high-voltage, three-phase hybrid energy storage systems are designed for those who want to combine a high-performance solar panel system with battery storage. They are the ideal choice for larger single-family homes, heat pump heating, electric vehicle charging, or properties where a stable three-phase supply and high self-consumption are key considerations.

The system has a modular design: the hybrid inverter, the high-voltage battery control unit + base unit, and the LiFePO₄ battery modules together form a unified, scalable energy storage solution.

High power for three-phase systems

The rated power range of 10–20 kW allows the system to safely serve both larger residential and smaller commercial loads. The three-phase design ensures stable operation while also supporting asymmetric loads, which is particularly important in modern, mixed consumer environments.

The system is suitable for on-grid, off-grid, or hybrid operation, ensuring power supply to critical loads even during power outages. Generator backup can also be integrated, further enhancing operational reliability.

Deye GB-L Pro Pack 4.1 HV LiFePO₄ Battery – Safety and Long Service Life

The Deye GB-L Pro Pack 4.1 HV is a high-voltage (HV) LiFePO₄ battery module specifically designed for hybrid energy storage systems. Lithium iron phosphate technology is one of the safest solutions for residential energy storage, while providing a long service life and stable performance in everyday use.

A key advantage is that it is compatible with Deye’s GB-S series three-phase hybrid inverters (GB-S10K / S12K / S15K / S20K-EU) in terms of system logic, meaning this HV battery module is the ideal pairing for GB-S solutions. Thus, the storage system and the inverter work together as a unified, manufacturer-integrated system, which means simpler design, faster implementation, and more predictable operation.

Thanks to its modular design, the system can be easily adapted to the specific project: storage capacity can be expanded step by step by connecting multiple battery modules in series. The advantage of the high-voltage platform is that it supports efficient operation, reduces current load, and contributes to the optimized operation of the entire system.

Outstanding efficiency and modern solar panel compatibility

Deye GB-S inverters operate with high efficiency and a wide MPPT range, making them well-suited for solar systems with varying orientations and power outputs. The 1000 V DC side and significant over-panel capacity are particularly advantageous for larger roof areas.

The system supports modern energy management solutions, optimizes self-consumption, and helps reduce the amount of energy drawn from the grid. This is particularly important in the face of rising electricity prices or in a net metering environment.

Weather-resistant design and reliable operation

IP65-rated components enable safe indoor or properly protected outdoor installation. The system features intelligent thermal management and can operate across a wide operating temperature range, ensuring stable performance even under Hungarian climatic conditions.

Built-in protection features—including overvoltage, overcurrent, short-circuit, and insulation protection—contribute to long-term, safe operation.

Who is the Deye GB-S10/12/15/20K-EU system recommended for?

This three-phase hybrid energy storage system is the ideal choice for:

• larger single-family homes
• heat pump or electric heating
• systems combined with electric vehicle charging
• properties with high annual energy consumption
• projects where future expandability is important

The modular design allows the system to grow along with energy needs.

SOLARKIT review

The Deye GB-S10K / S12K / S15K / S20K-EU is a robust, high-performance energy storage platform designed to meet the needs of three-phase residential and small commercial systems. The high-voltage design, LiFePO₄ technology, and scalable capacity combine to offer a stable, long-term sustainable solution.

We recommend it to those who not only want a solar system but are striving for true energy independence—without compromise.