Kärcher SE 3-18 Compact Home Battery Set 5.0-F Cordless Spray Extraction Cleaner for Carpets and Upholstery, 18 V / 5.0 Ah Battery and Charger Included (1.081-508.0)

The Kärcher SE 3-18 Compact Home Battery is a high-performance lithium iron phosphate (LFP) energy storage solution designed for residential use. With a usable energy capacity of 3.2 kWh and a nominal DC voltage of 128 V, it provides reliable power for home backup or solar self-consumption. The battery features a compact, wall-mountable design and supports scalability up to 5 modules for a total of 16.2 kWh.

Advantages

This battery offers a 100% depth of discharge (DoD) and an exceptional cycle life of 8,000 cycles at 70% DoD, ensuring long-term durability. Its round-trip efficiency exceeds 97%, minimizing energy loss. The IP65 rating provides protection against dust and water jets, making it suitable for indoor or outdoor installation. Natural convection cooling ensures silent operation without moving parts.

Suitable for

• Home energy storage systems
• Solar photovoltaic (PV) self-consumption
• Backup power for essential loads
• Integration with SMA Sunny Boy Storage inverters

Key specifications

• Usable Energy Capacity: 3.2 kWh
• Battery Chemistry: Lithium Iron Phosphate (LFP)
• Nominal DC Voltage: 128 V
• Max Charge/Discharge Power: 3.2 kW
• Max Charge/Discharge Current: 25 A
• Depth of Discharge (DoD): 100%
• Cycle Life: 8,000 cycles (at 70% DoD)
• Round-Trip Efficiency: > 97%
• Operating Temperature Range: -10 °C to +50 °C
• Ingress Protection (IP) Rating: IP65
• Communication Interface: CAN bus
• Warranty: 10 years
• Mounting Type: Wall-mounted / Floor-standing (with optional base)
• System Compatibility: SMA Sunny Boy Storage Inverters
• Scalability: Up to 5 modules (16.2 kWh total)
• Cooling: Natural convection
• Enclosure Material: Aluminum
• Certifications: CE, IEC 62619, UN 38.3

Recommendations

For optimal performance, pair this battery with a compatible SMA inverter and ensure proper ventilation. The wall-mount bracket is included; floor-standing base sold separately. Always follow local electrical codes and installation guidelines.