Sofar BTS 5K

Energy Storage Battery Module BTS 5K — Sofar

Compact, modular energy storage battery module designed for scalable PV storage systems. Its small size and easy installation support rapid deployment, while flexible capacity expansion and pack optimization maximize usable energy with extremely low standby self-consumption.

Applications and use cases

The BTS 5K module is engineered for residential and commercial solar installations, enabling scalable energy storage for rooftop PV systems, backup power, and grid-support applications. Its IP65-rated enclosure makes it suitable for indoor and outdoor installation, and the CAN communication interface allows seamless integration with energy management systems and inverters from Sofar or compatible partners.

• Modular energy storage that can be expanded by adding additional BTS 5K units to grow from about 5.1 kWh per module to larger packs
• High-voltage DC operation (nominal 400 V) compatible with common hybrid and storage inverters
• Outdoor-ready, protected enclosure for varied environments thanks to IP65 rating
• CAN-based connectivity for reliable monitoring and control within a storage system
• Compact footprint and modular design suited for retrofit installations and space-constrained setups

Key electrical and performance parameters

Each BTS 5K module delivers 5.12 kWh of usable energy at a nominal 400 V DC, with a voltage operating window from 300 to 435 V. The lithium iron phosphate (LFP) chemistry provides safety and longevity, while a depth of discharge up to 90% maximizes usable capacity per cycle. The enclosure is IP65 rated for rugged reliability, and the CAN interface supports integration with energy management systems and compatible inverters.

• Usable energy per module: approximately 5.12 kWh
• Nominal voltage: 400 V DC
• Voltage range: 300–435 V
• Depth of discharge: up to 90%
• Technology: Lithium Iron Phosphate (LFP)
• Protection rating: IP65
• Communication: CAN protocol
• Dimensions: 170 mm (L) × 708 mm (W) × 420 mm (H)
• Weight: 50 kg per module

Mechanical design, installation and integration

The BTS 5K module is purpose-built for straightforward installation in scalable energy storage configurations. Its compact dimensions and standardized enclosure support flexible mounting options, while expansion is achieved by adding more BTS 5K units to reach the target storage capacity. Designed to integrate with Sofar inverters and BMS networks via CAN communication, it provides a reliable path to high-density, safe, and expandable energy storage for new builds and retrofits alike.

• Configurable from 1 to 4 modules per pack to reach about 5–20 kWh of storage
• IP65-rated enclosure suitable for diverse installation environments
• Nominal 400 V DC with a wide 300–435 V operating range
• CAN-based data communication for monitoring and control
• Modular, stackable design with a unit weight of 50 kg for manageable handling
• Footprint and mounting options designed for flexible integration with Sofar systems