--- title: "Easun Power iSolar SMH 3KW Off-grid Inverter: Specs & Datasheet | ComparePV" description: "Easun Power iSolar SMH 3KW 2.4 kW off-grid inverter. Specs: 1 MPPT, 102 V max DC input, 5.2 kg." source: "https://comparepv.com/inverter/easun-power-isolar-smh-3kw" updated: 2026-01-19 --- # Easun Power iSolar SMH 3KW ## Identity - **Manufacturer:** Easun Power - **Model:** iSolar SMH 3KW - **Series:** iSolar SMH - **Rated AC power:** 2.4 kW - **Type:** Off-grid - **Phases:** Single-phase - **Battery port:** yes ## How it compares Compared against 164 inverters up to 3 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | - | 97.0% | | | | MPPT trackers | 1 | 1 | Typical | 43 | | Max DC input voltage | 102 V | 550 V | Weak - bottom 1% | 135 | | Weight per kW | 2.2 | 4.0 | Strong - top 9% | 14 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 2.4 kW - **Max apparent power:** 3.00 kVA - **Phases:** Single-phase - **Nominal AC voltage:** 230 V ### PV input - **Max DC input power:** 1.00 kW - **Max DC voltage:** 102 V - **MPPT voltage range:** 30 to 80 V - **MPPT trackers:** 1 ### Efficiency - **Max efficiency:** 98.0 % ### Battery - **Battery port:** Yes - **Battery voltage:** 24 VDC (nominal) - **Max charge current:** 70.0 A - **Backup power:** 2.40 kW - **Grid-forming:** Yes ### Physical - **Dimensions:** 100 × 272 × 305 mm - **Weight:** 5.2 kg - **Operating temperature:** 0 to 55 °C - **Max humidity:** 95 % ### Connectivity and protection - **Interfaces:** Display ### Pros - **All-in-one architecture reduces capital expenditures (CAPEX).** - Integrating a sinusoidal inverter, an MPPT charge controller, and a battery charger into a single enclosure eliminates the need to purchase separate components (e.g., an external Victron SmartSolar MPPT unit costing approximately 600-900 zł). For off-grid/UPS systems with a power output of 3-6 kW, this represents a real cost saving on equipment and cabling. - **Dual MPPT in the SMH-III** - The SMH-III models (4.2 kW and 6.2 kW) are equipped with two independent MPPT trackers, which allows for the use of two roof sections or modules with different orientations without incurring losses due to averaging the power point. Competitive all-in-one devices in this price range (e.g., Voltronic Axpert MKS) typically offer only one MPPT. - **Built-in Wi-Fi in all models** - The WiFi module is standard equipment for the entire SMH product line (models 2-7 kW, designated "WIFI"), without any additional charges for the data gateway. Monitoring is carried out through a dedicated mobile application, which is standard among mid-range Chinese inverters, but does not require the purchase of an external dongle (approximately 60-150 zł for Growatt/Solis). - **Operation without batteries** - The SMH-III 6.2 kW model supports a battery-less mode, allowing for the operation of a PV system without an energy storage system. This is an important feature for phased installations, where a battery is planned for future use - it eliminates the need to replace the inverter after expanding the system. - **Fast UPS switching and flexible priority settings** - The switching time to battery power is less than 20 ms (manufacturer's specification, SMH III manual), which meets the requirements for sensitive devices (computers, NAS). Configurable PV→grid→battery priorities allow you to adjust the charging strategy to current energy prices or battery status. ### Cons - **Unstable communication with the Battery Management System (BMS)** - Multiple reports on diysolarforum.com (threads from 2023-2025) document the unstable communication between RS485/CAN and popular BMS (such as JK BMS, Daly). Proper operation requires manual configuration of the Pylontech (Li2) protocol and, in some cases, ferrite filters - a technical barrier for non-experts and a risk of emergency disconnection of the storage system. - **Lack of ON-GRID connection certificates (PL)** - The SMH series is a hybrid/off-grid system that does not require the VDE-AR-N 4105 / EN 50549-1 certification, which is typically required for prosumer applications in the Polish market. This means that the inverter cannot be legally registered as a grid-connected device within the net-billing scheme - this represents a significant limitation for typical Polish prosumer installations. - **Short manufacturer's warranty (1-2 years)** - The standard Easun Power warranty is 1 year (some distributors extend it to 2 years), while comparable market players - Growatt and Solis - offer 5 years, and Victron Energy offers 5 years with the option to extend. In the context of a 10-year PV system lifespan, this difference translates into a real risk of service costs. - **Brand not included in BNEF Tier-1 list** - Easun Power is not listed on Bloomberg NEF's Tier-1 Inverter Manufacturers list (Q1 2026). While the BNEF list primarily focuses on grid-tie inverters, its absence suggests a lower level of quality verification and less certainty regarding the long-term availability of technical support and spare parts over a 10-15 year period. ## About this series The Easun Power iSolar SMH series are hybrid/off-grid all-in-one units - combining a sinusoidal inverter, an MPPT charge regulator, and a battery charger. This makes them ideal as a home PV power supply with UPS functionality and for off-grid installations. Their key advantage is flexible energy management (PV-network-battery prioritization), operation without batteries, and comprehensive protections safeguarding the installation and connected devices. Depending on the version, the series offers multiple MPPT (including dual MPPT), simplifying the design for two roof tilts, differently oriented modules, or partial shading - each tracker operates independently and maintains higher energy yields. The high European efficiency means significantly better real-world performance in Poland's typical climate conditions, not just a "laboratory" result. Available is WiFi monitoring (optional wired/communication/service interface), an app view of the operation, and integration with selected BMS via RS485/CAN - important for energy storage systems. It's advisable to verify the specific model certifications and warranty conditions from the seller before purchase. ## Questions ### Can the Easun Power iSolar SMH operate without connected batteries? Yes, the iSolar SMH series supports operation without batteries. In this mode, the inverter can directly power loads from either the solar panels or the grid, without the need for a battery storage system. This is a significant advantage when expanding an existing installation, as batteries are planned for a later stage. However, it's important to note that the UPS (uninterruptible power supply) function requires a connected battery. ### Which batteries are compatible with the Easun Power andSolar SMH inverter? The iSolar SMH series is compatible with both traditional lead-acid (AGM, gel) batteries and modern lithium LiFePO4 batteries. Communication with intelligent BMS units is achieved via RS485 or CAN interfaces, enabling full data exchange regarding battery charge status and parameters. The 4.2 kW models operate at a 24 V DC system voltage, while the 6.2 kW models operate at a 48 V DC system voltage. ### Does the iSolar SMH inverter have dual MPPT tracking, and what does this mean in practice? Selected versions of the iSolar SMH series are equipped with two independent MPPT trackers. In practice, this means the ability to connect panels from two different roof sections or with different orientations (e.g., south and east) without reducing the overall power output. Each tracker operates independently and autonomously, searching for the optimal power point, which is particularly important when one section is partially shaded. ### How does the Easun Power andSolar SMH inverter monitoring and control system work over the internet? The iSolar SMH series features built-in Wi-Fi and works with the SmartESS app, available for iOS and Android. This allows you to remotely monitor PV production, battery charge status, power consumption by loads, and adjust energy source priorities (PV, grid, battery). The device also supports RS485 communication, which is useful for integration with building automation systems. ### Does the iSolar SMH series have certifications that allow it to operate in parallel with the Polish power grid? Certificates of parallel network operation approval (e.g., VDE-AR-N 4105 or compliance with NC RfG regulations) are crucial for legally connecting to the OSD grid in Poland. Before purchasing a specific iSolar SMH model, it is absolutely essential to verify with the seller that they possess the relevant certificates required by your energy distributor, as document availability may vary depending on the model and market. ### What is the warranty on the Easun Power iSolar SMH inverters, and what does it cover? The manufacturer's warranty for the iSolar SMH series is standardly 12 months. The terms of the warranty may be extended by a Polish distributor or retailer, so it is advisable to confirm this in writing before making a purchase. The warranty covers manufacturing defects; damage resulting from improper installation, voltage surges, or exceeding the specified input parameters is typically excluded from coverage. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/SMH-3K-81a5e39487a9.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Easun Power ISolar SPL 3K](https://comparepv.com/inverter/easun-power-isolar-spl-3k) | 2.4 kW | | | 6.9 kg | 1.7 kg heavier | | [Easun Power iSolar SPH 3KW](https://comparepv.com/inverter/easun-power-isolar-sph-3kw) | 2.4 kW | | | 5.2 kg | Similar on paper | | [Easun Power ISolar PLV 3K](https://comparepv.com/inverter/easun-power-isolar-plv-3k) | 2.4 kW | | | 9.8 kg | 4.6 kg heavier | | [Easun Power ISolar MLV 3K](https://comparepv.com/inverter/easun-power-isolar-mlv-3k) | 2.4 kW | | | 9.8 kg | 4.6 kg heavier | | [Easun Power ISolar MLV 3K-24V-Alfa](https://comparepv.com/inverter/easun-power-isolar-mlv-3k-24v-alfa) | 2.7 kW | | | 12.0 kg | +0.3 kW, 6.8 kg heavier | | [Growatt SPF 2000TL HVM](https://comparepv.com/inverter/growatt-spf-2000tl-hvm) | 2 kW | | | 8.0 kg | -0.4 kW, 2.8 kg heavier | | [Easun Power ISolar MLVZ 2KW-24V](https://comparepv.com/inverter/easun-power-isolar-mlvz-2kw-24v) | 2 kW | | | 11.0 kg | -0.4 kW, 5.8 kg heavier | | [Easun Power ISolar SPV 2K-24](https://comparepv.com/inverter/easun-power-isolar-spv-2k-24) | 2 kW | | | 5.5 kg | -0.4 kW | --- Source: https://comparepv.com/inverter/easun-power-isolar-smh-3kw