Easun Power 4KVA (PVmax=500V, 48V battery)

The series of inverters support both network and isolated modes with a UPS-like switching function - the switching time, as reported by users in tests, is less than 20 ms, which meets the requirements for uninterrupted power supply for IT equipment and pumps. It enables self-consumption and simultaneous protection against power outages without the need for an additional device.

All models in the series are equipped with a factory-installed WiFi module and a dedicated mobile application (iOS/Android). This eliminates the need to purchase an external logger (such as those used in Growatt SPF or Voltronic-OEM systems), which reduces the total installation cost by approximately 150-300 zł.

The series supports communication with BMS via RS485, CAN, and RS232, enabling native integration with Pylontech, WECO, and other popular energy storage systems in Poland. It eliminates compatibility issues with protocols, which are common in cheaper systems that rely solely on voltage-based charging management.

The manufacturer maintains inventory in Europe (confirmed warehouse in Poland and Germany), resulting in delivery times of 3-7 business days instead of 3-6 weeks when importing from China. This is particularly important in the event of a breakdown or the need for quick replacement of the equipment.

Selected models in the series have CE and VDE4105 certifications (a standard required, for example, in Germany for connection to the grid), as well as compliance with IEC and RoHS standards. This allows for legal connection in EU countries, including Poland, in accordance with OSD requirements.

The declared peak efficiency of the inverters in this series ranges from 90-93%, while comparable tier-1 hybrid models (Huawei SUN2000, SMA Sunny Boy Storage, Fronius Symo GEN24) achieve 97-98.4%. This difference of approximately 4-5% translates to a real decrease in annual energy production - for an installation of 10 kWp producing 10,000 kWh/year, this amounts to an additional 400-500 kWh of losses per year.

Numerous reviews on Trustpilot and the DIY Solar Power Forum (2023-2025) describe instances where defects during the warranty period resulted in months-long lack of response from the manufacturer (over 2 months waiting for parts), refusal to cover costs, or failure to respond to emails. This poses a significant risk for commercial and prosumer installations that require Service Level Agreements (SLAs).

The DIY Solar Forum community and independent reviewers indicate that Easun Power primarily functions as a rebrand distributor of OEM devices (Voltronic/Axpert platforms and similar), rather than as an independent manufacturer. This implies limited control over the quality of components and the potential for inconsistencies in production between batches.