The Easun Power ISolar V series inverters offer a practical solution for installations prioritizing operational flexibility - both in off-grid mode and in hybrid systems with the grid or generator. Depending on the unit version, they can even operate without batteries initially, simplifying system startup and allowing for energy storage expansion later. The application of double MPPT provides tangible benefits for uneven rooftops or partial shading - each string can be independently optimized, stabilizing energy yield throughout the day.
High European efficiency means lower losses under typical climatic conditions in Poland, resulting in better annual energy production. Additionally, comprehensive communication features are available: Wi-Fi and service interfaces like RS485 enable remote monitoring of parameters and diagnostics via an app or computer. This series is also compatible with modern lithium batteries and BMS, supporting safe charging and discharging. It's worth noting the protection features (overload, overheating, short circuit) and warranty conditions, which depend on the purchasing channel. This is an excellent choice for homes, farms, or small businesses prioritizing energy independence and control over self-consumption.
Ranking
Specifications
Pros and cons
Two independent MPPT trackers allow for connecting strings with different orientations or under partial shading without mutual losses. In typical Polish roof conditions (south-facing or east-facing), this can translate into a 5-10% higher annual energy yield compared to single-tracking inverters.
This series allows for the installation and powering of receivers directly from PV panels even before batteries are purchased, which lowers the initial investment required for off-grid systems. For small farms or households, this means the possibility of gradually expanding the energy storage capacity.
The ability to use three power sources (grid, generator, and PV + battery) in a single device reduces installation costs compared to a traditional on-grid inverter + UPS + charger controller setup. This is a significant advantage when designing backup power systems for homes or small businesses.
Built-in Wi-Fi enables remote monitoring and configuration via a mobile app without the need for additional accessories (unlike, for example, Growatt, where a Wi-Fi communicator is a paid add-on). RS485 allows integration with external SCADA or battery BMS systems.
Native communication with LiFePO4 (lithium iron phosphate) batteries ensures safe management of charging and discharging parameters, reducing the risk of battery damage. This is particularly important for 48 V, 100-200 Ah batteries, which are commonly used in microgrid installations.
ISolar V II and ISolar V III are marked as "no longer manufactured" in the ENF Solar database. This means that spare parts are limited in availability, there is a risk of firmware updates no longer being available, and there may be difficulties with post-warranty service, especially in Poland, where there are only a few authorized Easun service centers.
Reviews on Trustpilot (2024-2025) highlight significant issues with the warranty service: months-long waiting times for replacements, return of defective parts, and a lack of response from the support department. For critical installations (e.g., home power supply, central heating system), a malfunctioning RMA process represents a real operational risk.
Users of similar Easun models (as reported in the DIY Solar Power Forum, 2023) indicate a zero-power consumption of approximately 50 W, which is higher than that of mid-range models (e.g., Deye SUN-5K-SG03LP1 - approximately 35 W, Victron MultiPlus-II - approximately 20 W). In a system operating for 8760 hours per year, this difference of 15 W represents a loss of approximately 130 kWh per year.
Problems reported on forums (elektroda.pl, DIY Solar Forum) with MPPT tracker performance below ~150W of PV input can lead to suboptimal battery charging under cloudy conditions - which are typical in the Polish climate during spring and autumn. Brands like Victron and SMA exhibit more stable performance under these conditions.
Alternatives
About the ISolar V series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.