BYD Battery-Box Premium HVS 12.8

Battery storage system BYD Battery-Box Premium HVS 12.8

Modular high‑voltage LiFePO4 energy storage designed for on‑grid solar, backup power and off‑grid scenarios, featuring scalable capacity from 5.1 to 12.8 kWh per stack and expansion up to 38.4 kWh by stacking multiple units.

Applications and use cases

The BYD Battery-Box Premium HVS 12.8 is tailored for residential rooftops and small commercial photovoltaic systems where optimized self-consumption, reliable outage protection and flexible expansion are important. Its plug‑in, stackable design supports gradual capacity growth as energy needs rise, while the emergency power capability provides a ready backup option for essential loads. With compatibility across major hybrid inverters, it enables cohesive integration into existing or future solar installations.

• Residential rooftop PV with enhanced self‑consumption and storage
• Small to mid‑sized commercial solar deployments needing backup power
• Expandable energy storage for growing loads and evolving energy goals
• Indoor or outdoor installations thanks to protective IP55 rating
• Hybrid inverter compatibility for integrated energy systems

Key electrical and performance parameters

This high‑voltage storage module uses LiFePO4 chemistry for safety, longevity and stable performance. It is designed as 2–5 battery modules connected in series to achieve 5.1–12.8 kWh of usable capacity, with parallel stacking up to three identical strings to reach 38.4 kWh total. The system operates at a nominal 512 V with a voltage range of 400–600 V and delivers solid efficiency for optimized energy use.

• Usable capacity per stack: 5.1–12.8 kWh (2–5 modules in series)
• Expandable to 38.4 kWh with up to 3 parallel stacks
• Nominal voltage: 512 V; operating range: 400–600 V
• Lithium iron phosphate (LiFePO4) chemistry for safety and long life
• Efficiency: about 96%
• Protection rating: IP55 for indoor/outdoor use
• Dimensions: 298 mm (L) × 585 mm (W) × 1411 mm (H); weight ≈ 205 kg per unit
• Modular, plug‑in stackable connections with cable‑free assembly
• Compatible with major hybrid inverters (e.g., Huawei, Fronius, SMA)

Battery and backup capabilities

The Premium HVS 12.8 is built to provide dependable backup power and flexible energy management, supporting on‑grid operation with emergency power function and the ability to scale capacity as requirements grow. Its modular architecture makes it straightforward to add more HVS modules or parallel stacks, enabling larger storage for backup, self‑consumption optimization and lightweight off‑grid scenarios when needed.

• Emergency power function for outage backup of essential circuits
• Scalable storage from 5.1 kWh to 38.4 kWh using modular additions
• Direct parallel connection of up to 3 identical HVS units to increase capacity
• Broad inverter compatibility supports integrated PV system design
• IP55-rated enclosure suitable for diverse installation environments
• LiFePO4 chemistry for safety, thermal stability and long service life
• Compact, stackable form with plug‑in connections for quick installation
• 10‑year warranty coverage provides long‑term reliability