The Easun Power LSOLAR SML-II inverter series is a practical off-grid solution featuring an integrated MPPT regulator, designed to power homes or small businesses using photovoltaics and energy storage - even in locations where you don’t want to feed electricity back into the grid. A key feature is its ability to operate with or without a battery, enabling staged installations and allowing PV energy to supply loads directly.
The SML-II utilizes one MPPT tracker, facilitating stable operation of the panel string and better maintaining energy yield under varying sunlight conditions. In practice, this European efficiency translates to lower energy losses in typical climatic conditions - resulting in more real energy production from the same installation.
For monitoring and service communication, WiFi monitoring is available, simplifying diagnostics and parameter viewing. The series is compatible with popular energy storage systems (including lithium-based ones) and offers CE/RoHS certifications. This makes it an excellent choice for residential installations and facilities where energy independence matters.
Ranking
Specifications
Pros and cons
The SML-II allows for powering loads directly from PV without a connected battery (DC voltage of PV >200 V required), which enables the gradual construction of off-grid systems. Most comparably priced off-grid inverters (e.g., Voltronic Axpert) require a battery to be present for initial startup.
The maximum input voltage for MPPT is 500 V DC at a charging current of 100 A (5.5 kW model), which allows for the construction of longer strings and reduces transmission losses in distributed systems. Models in this price range (e.g., Growatt SPF 5000 ES) typically offer up to 450 V DC.
The built-in Wi-Fi module with a mobile app is available at no extra cost, while manufacturers in the mid-range (e.g., Victron Energy) charge around €60-90 for the communication module (VE.Direct WiFi) as an optional accessory.
The series supports the connection of up to 9 inverters in parallel, enabling power scaling up to approximately 49.5 kW (9 × 5.5 kW) without the need for an external controller. This is a significant advantage for commercial buildings that are building the system incrementally.
The built-in BMS algorithm enables direct communication with popular lithium battery packs (LiFePO4 48 V), eliminating the need for an external protocol converter in typical residential energy storage systems.
A single MPPT (Maximum Power Point Tracking) tracker cannot independently control strings with different orientations or tilt angles. Competitive prosumer-grade models, such as the Growatt SPF 6000T DVM (dual MPPT), offer greater flexibility for multi-pitched roof installations.
The manufacturer offers a 2-year warranty, while off-grid tier-1 inverters (such as Victron MultiPlus-II and SMA Sunny Island) typically come with a 5-year standard warranty. The shorter warranty period is particularly important in installations where access for maintenance and repairs is difficult.
On the Trustpilot platform, the Easun Power brand receives an average rating of 1.5-2/5 (data: 2024-2025), with the majority of reviews citing a lack of response from customer service regarding warranty claims and the replacement of faulty units. Easun does not manufacture its own products and operates as an OEM-reseller, which limits its technical support capabilities in the European market.
Alternatives
About the LSOLAR SML-II series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.