BYD Battery-Box Premium HVM 22.1

Battery storage system BYD Battery-Box Premium HVM 22.1

Scalable high‑voltage LiFePO4 battery storage system designed for residential and light commercial PV installations, built around BYD Battery-Box Premium HVM 22.1 modules to optimize self‑consumption, provide backup power, and support energy independence.

Applications and use cases

The BYD Battery-Box Premium HVM 22.1 is engineered for flexible energy storage in rooftop solar setups and smaller commercial PV projects. Its modular design allows stacking 3 to 8 HVM battery modules in series to achieve a usable capacity of 8.3 to 22.1 kWh per stack, with direct parallel connection of up to 3 identical stacks enabling a total capacity of up to 66.2 kWh. This scalability makes it suitable for self‑consumption optimization, peak shaving, and reliable backup power, while outdoor readiness and a compact footprint facilitate installation in a variety of environments. The system is designed to interface with major hybrid inverter brands, enabling versatile integration with existing or planned PV installations.

• Usable capacity per stack: 8.3–22.1 kWh
• Expandable up to 66.2 kWh with up to 3 parallel stacks
• Modular, plug‑in HVM modules for simple expansion
• High‑voltage LiFePO4 chemistry for safety and longevity
• Outdoor‑ready enclosure (IP55) for versatile mounting
• Compact, stackable form factor suitable for rooftop or ground installations
• Compatible with leading hybrid inverters for flexible system design
• Scalability by adding HVM modules or parallel stacks later

Key electrical and performance parameters

The storage system delivers a high‑voltage, scalable solution with robust performance characteristics. Each stack operates at a nominal system voltage around 409 V, with a practical operating range of roughly 320–480 V. The LiFePO4 (LFP) chemistry provides strong thermal stability and long cycle life, while efficiency remains competitive at up to 96%. The module footprint supports outdoor use, and the design accommodates substantial mass and size that scale with the number of modules installed.

• Usable capacity per stack: 8.3–22.1 kWh
• Maximum expandable capacity: 66.2 kWh with up to 3 stacks in parallel
• Nominal system voltage: ~409 V; voltage range: 320–480 V
• Battery chemistry: LiFePO4 (LFP) for safety and long life
• Efficiency: up to 96%
• Protection: IP55 outdoor rating
• Module weight: approximately 319 kg; dimensions per module: 298 mm (L) × 585 mm (W) × 2110 mm (H)
• Modular, plug‑in connections for straightforward installation

Battery and backup capabilities

The BYD Battery-Box Premium HVM 22.1 is designed to support self‑consumption, backup power, and energy independence. Its modular architecture enables expansion by adding HVM modules or parallel stacks, increasing usable capacity as demand grows. The system leverages safe LiFePO4 chemistry to deliver reliable cycling performance, with outdoor suitability (IP55) and compatibility with a broad range of hybrid inverters, allowing seamless integration into diverse PV configurations.

• Usable energy per stack: 22.1 kWh at the upper end; scalable to 66.2 kWh with 3 stacks
• Backup power and self‑consumption optimization capabilities
• Safe LiFePO4 chemistry with strong cycle life
• Outdoor‑capable IP55 enclosure with stackable design
• Wide inverter compatibility with plug‑in module connections
• Expandable by adding HVM modules or parallel HVM stacks later
• Designed for residential rooftops and light commercial PV applications