HV Inverter Charger SMA Sunny Boy Storage 3.7kW SBS3.7-10 Single-phase

Product description

The SMA Sunny Boy Storage 3.7kW SBS3.7-10 Single-Phase HV Charger Inverter is a high-voltage battery inverter designed for new or existing self-consumption systems with AC coupling. Its multistring architecture with three independent battery inputs allows connection of up to three HV batteries from different manufacturers or parallel inputs for larger capacity banks. With 3.68 kW nominal AC power, max. efficiency of 97.5%, and IP65 protection rating, it offers silent operation through natural convection and the reliability of SMA. It includes a 3.68 kW Secure Power Supply (SPS) emergency output and can be expanded with external switching equipment to provide automatic backup for the entire home.

Main features

• Nominal AC power 3.68 kW (3.7 kW) single-phase at 230 V; overload 4.6 kW up to 60 s.
• 3 independent HV battery inputs (multistring), parallelizable for greater capacity.
• Battery range: 100–550 Vdc (Vnom 360 V); 10 A max. per input; total I_SC 40 A.
• Max. efficiency 97.5% (European efficiency ~96.8%).
• SPS 3.68 kW (max. 16 A) with manual switching; option for automatic backup with external equipment.
• Connectivity: WLAN/Ethernet (Speedwire), Webconnect, Modbus SMA/SunSpec, Modbus-RTU (RS-485) and CAN for the battery.
• Enclosure IP65, −25…+60 °C, 535×730×198 mm, 26 kg; typical noise 39 dB(A); convection cooling.

Advantages or benefits

• Simple modernization: add HV storage to any existing photovoltaic installation via AC coupling.
• Scalable and flexible: connect up to three HV batteries (or parallelize inputs) to grow with your energy needs.
• Supply continuity: the SPS function powers critical loads up to 3.68 kW; automatic backup (optional) maintains the home during outages.
• Total self-consumption control: dynamic feed-in limitation (0–100%), integration with meters, and load management.
• Reliability and low maintenance: fanless design, IP65, and high-quality electronics “Made in Germany”.

Purpose or applications

Ideal for homes and small businesses seeking to maximize self-consumption with high-voltage batteries without replacing their current photovoltaic inverter. The single-phase SBS3.7-10 battery inverter is perfect for time-of-use tariffs, basic emergency backup, and projects where AC coupling simplicity is prioritized.

Technical specifications

Compatibilities

Direct compatibility: SMA-approved HV lithium batteries (official list), SMA Energy Meter and Sunny Home Manager 2.0 for feed-in control and load management, SMA inverters with Webconnect for power coordination.

Compatible accessories (not included): automatic transfer switch (ENWITEC) for full backup, DC/AC Type II protections, cabling and IP65 enclosures, Modbus/SunSpec meters.

With its multistring architecture, full connectivity, and backup capability, the SMA Sunny Boy Storage 3.7kW SBS3.7-10 Inverter Charger is the most flexible and robust way to add HV battery storage to your self-consumption system.