Hoymiles 12 kWh HiBattery HB-4020-X All-in-One Storage System and 2x HB-4020-S Expansion Batteries

With the all-in-one storage unit from Hoymiles (MPN: 205174), you can expand your solar system in no time. At the heart of the system, the HB-4020-X integrates a 2,500 W microinverter and a 4 kWh LiFePO4 battery. The capacity can be increased to up to 16 kWh with expansion modules. With four MPPTs and up to 4,000 W of PV connection capacity, you can reliably power your devices. The control system adapts to your electricity consumption and helps you save energy. The modular system can be quickly installed via plug-and-play, without drilling or complicated wiring. Experience the future of energy generation and secure a long-lasting, sustainable energy source for your home.

System Highlights

• Improved performance & higher yields: 4 kWh integrated battery, expandable up to 16 kWh. 4 MPPTs and 4 kW PV input for maximum solar energy utilization
• Easy Installation: Plug-and-play connection; the entire home system is set up in 1 minute. Flexible, stackable battery expansion for growing needs
• Open compatibility: Compatible with Hoymiles and third-party meters (e.g., Shelly, Everhome). Open MQTT protocol for integration into third-party energy management systems
• Maximum safety: 314 Ah LiFePO4 battery cells with over 8,000 charge and discharge cycles. The Hoymiles BMS integrates 48 protection functions, intelligent cell balancing, self-heating for low temperatures, aerosol fire suppression, a pressure relief valve, and over-temperature protection for DC connections. IP66 protection rating, battery-level DC/DC balancing
• Low-maintenance & long-lasting: Intelligent cell balancing extends service life, battery-level DC/DC balancing, natural convection (fanless, <20 dB).
• Plug-and-play expansion: Easy connection to the existing HB-4020-X system—without additional controls or complex installation.

The set includes:

• 1x Hoymiles HiBattery HB-4020-X LiFePO4 Battery 4 kWh All-in-One Storage 2500 W 4 MPPT
• Hoymiles HiBattery HB-4020-S LiFePO4 expansion battery, 4 kWh (optional: 1–3 units or none)

How does the all-in-one system work?

During the day —when the sun is shining—your solar system generates electricity. You use this electricity directly to power your household appliances. If more electricity is generated than you currently need, the system automatically stores the surplus in the battery.
In the evening —As soon as it gets dark and the solar system stops supplying electricity, the battery kicks in. It releases the electricity stored during the day, so you can power your appliances with your own solar electricity even at night.

All-in-One Storage System – HB-4020-X

With four MPPT inputs and an integrated inverter, the HB-4020-X can optimally capture, store, and deliver solar power. The system is compatible with modern smart meter solutions and integrates seamlessly into smart home environments. The open MQTT protocol enables flexible integration into third-party energy management systems. The Hoymiles BMS offers 48 protection functions. Integrated fire suppression, a pressure relief valve, self-heating, and IP66 protection ensure safe operation even under extreme conditions. The LiFePO4 cells offer over 8,000 charge cycles for a long service life. Intelligent cell balancing further extends the battery’s service life.

• Rated energy: 4,020 Wh
• Rated capacity: 314 Ah
• Rated voltage: 12.8 V
• Cooling: Natural convection (fanless, <20 dB)
• Protection class: IP66
• Weight: 42 kg
• Dimensions: 520 × 384 × 199 mm

Expansion Battery - HB-4020-S

The battery connects directly to the HB-4020-X base module. Installation is straightforward via plug-and-play. This allows the system to grow step by step to meet your energy needs. Thanks to natural convection, the battery operates fanless and virtually silently (<20 dB). Its robust construction and self-heating mechanism ensure safe operation even at sub-zero temperatures or high humidity.

• Rated energy: 4,020 Wh
• Rated capacity: 314 Ah
• Nominal voltage: 12.8 V
• Charging/discharging temperature: –20°C to +55°C (with self-heating)
• Weight: 35 kg
• Dimensions: 520 × 275 × 199 mm