New on the market - hybrid three-phase inverter Sofar ESI

The Sofar ESI inverter - a new product from the line of three-phase hybrid inverters is now also available in our offer.

In January 2026, we tested the Sofar ESI-10K-T1 inverter in cooperation with VSD, a.s. The tests included measuring electrical parameters, thermal resistance and output signal quality.

One of the main aspects of why VSD, a.s. established such a laboratory is to verify that the respective hybrid system in island operation or when transitioning to/from island operation will not negatively affect the distribution system, either by introducing voltage or by negative feedback effects on the quality of electricity in the distribution system.

Product information "ESI-10K-T1"

Three-phase hybrid inverter Sofar ESI T1 for households and smaller commercial installations. In combination with Sofar BTS 5K batteries, it forms a compact PowerAll system.

• Number of MPPTs: 3, with AFCI protection, input current up to 20A per MPPT – ideal for bifacial and high-performance PV panels.
• Battery storage capacity: 5–30 kWh (expandable up to 180 kWh if 6 units are connected in parallel).
• Fast response: switch to backup power within 10 ms.
• Connectivity: RS485, optional WiFi/4G/LAN, monitoring via app.
• Installation: easy wall mounting, IP66 protection – suitable for indoor and outdoor use.
• Cooling: passive (fanless), silent operation.
• Remote monitoring: Remote monitoring possible via Wi-Fi/4G, optional Ethernet/Bluetooth communication interfaces

Sofar ESI-10K-T1 is the ideal solution for those looking for a reliable and flexible energy storage system. Thanks to its easy operation, high efficiency and wide range of functions, this inverter allows you to maximize the use of solar energy and ensure energy independence. Its modular design allows for easy expansion of the battery capacity as needed, making it an investment for the future.