--- title: "Easun Power ISOLAR-SMX-II-5.6KP-WIFI Off-grid Inverter: Specs & Datasheet | ComparePV" description: "Easun Power ISOLAR-SMX-II-5.6KP-WIFI 5.6 kW off-grid inverter. Specs: 1 MPPT, 500 V max DC input, 10.5 kg." source: "https://comparepv.com/inverter/easun-power-isolar-smx-ii-5-6kp-wifi" updated: 2026-01-19 --- # Easun Power ISOLAR-SMX-II-5.6KP-WIFI ## Identity - **Manufacturer:** Easun Power - **Model:** ISOLAR-SMX-II-5.6KP-WIFI - **Series:** ISOLAR-SMX-II - **Rated AC power:** 5.6 kW - **Type:** Off-grid - **Phases:** Single-phase - **Battery port:** yes ## How it compares Compared against 362 inverters from 3 to 6 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | - | 97.2% | | | | MPPT trackers | 1 | 2 | Weak - bottom 7% | 222 | | Max DC input voltage | 500 V | 600 V | Weak - bottom 19% | 237 | | Weight per kW | 1.9 | 3.3 | Strong - top 7% | 26 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 5.6 kW - **Max apparent power:** 10.00 kVA - **Phases:** Single-phase - **Nominal AC voltage:** 230 V - **Max AC current:** 40.0 A - **Grid frequency:** 50 Hz ### PV input - **Max DC input power:** 6.00 kW - **Max DC voltage:** 500 V - **MPPT voltage range:** 120 to 450 V - **Start-up voltage:** 120 V - **MPPT trackers:** 1 - **Max input current per MPPT:** 22.0 A ### Efficiency - **Max efficiency:** 92.0 % ### Battery - **Battery port:** Yes - **Battery voltage:** 40–60Vdc (settable; rated 48V, minimum starting voltage 44V) - **Max charge current:** 80.0 A - **Max discharge current:** 125.0 A - **Backup power:** 5.60 kW - **Grid-forming:** Yes ### Physical - **Dimensions:** 426 × 322 × 124 mm - **Weight:** 10.5 kg - **Cooling:** forced-air - **Noise:** 60 dB - **Operating temperature:** -10 to 55 °C - **Max humidity:** 95 % ### Connectivity and protection - **Interfaces:** Wi-Fi, Display - **Protocols:** RS485, WiFi (via RS485 WiFi/GPRS module), GPRS (via RS485 WiFi/GPRS module), USB (CH340T USB-serial), Dry contact ### Warranty and certificates - **Certifications:** CE (IEC62109-1), cETL (UL 1741 / CSA C22.2 No.107.1), FCC, SAA, EN61000 (EMC) ### Pros - **A clean sine wave and flexible work priorities** - The inverter generates a pure sine wave (THD \< 3%), which allows for powering sensitive devices (pumps, household appliances, medical equipment). The SBU/SUB/UTI priority modes enable precise management of energy sources based on usage habits and battery status. - **High PV voltage range (up to 500 V DC)** - The PV input accepts voltages up to 500 V DC, which allows for the construction of longer strings of panels and reduces transmission losses in the system. This is a significant advantage over older off-grid systems, which are limited to 145-200 V DC. - **MPPT efficiency ~99.9%** - The declared ability to track the maximum power point with 99.9% efficiency (as stated in the manufacturer's documentation and manuals.plus) translates to minimal energy conversion losses from PV systems, which is particularly important in variable solar conditions. - **WiFi monitoring + RS485/RS232 communication** - The built-in WiFi module (available in KP-WIFI variants) allows for remote monitoring of operating parameters without the need for additional accessories. The RS485/RS232 port enables integration with external lithium battery BMS (Battery Management System) and building automation systems. - **CE, SAA, RoHS, ISO9001 certifications** - The series holds the certifications required for the European and Australian markets (CE, SAA), which confirms compliance with electrical safety standards and facilitates legal installation by qualified installers. ### Cons - **The product line has been discontinued.** - The ISOLAR-SMX-II series is officially discontinued. This means limited availability of spare parts, no software updates, and a risk of lack of service support after the warranty period (3 years). Buyers of used units are particularly vulnerable to the risk of being unable to repair them. - **High self-consumption in SBU mode** - Users on the DIY Solar Power Forum measured their own consumption at approximately 50 W in SBU mode under low load, resulting in about 1.2 kWh of daily losses. For island installations in winter (short days), this represents a significant energy cost - competitive models like the Deye SUN-5K-SG03LP1 achieve less than 30 W in idle mode. - **Risk of failure during firmware update** - On the DIY Solar Power Forum, there have been multiple documented cases of complete device failure ("dead after firmware update") following attempts to update the software. Due to the discontinued product line and limited technical support, the risk of permanent damage is significantly higher than with actively supported competing products. - **Lack of automatic N-PE bonding in off-grid mode** - In island mode, without an AC-IN to DC converter connected, the neutral connection to PE (N-PE bonding) is not automatically performed. This requires the use of an external relay, which complicates the installation and can lead to problems with RCD/RCBO in a residential installation if the design does not account for this requirement. ## About this series The Easun Power ISOLAR-SMX-II series are off-grid inverters with charging functionality, designed for operation in island systems and as backup power for homes or small businesses. In practice, this means providing a stable power supply for loads even when the grid is unavailable, and energy can come from PV, batteries, or an AC input (e.g., the grid or a generator). The key advantage is the **pure sine wave** and finely-tuned operating priority modes, which facilitate adapting the installation to actual consumption habits. Depending on the variant, models with **single or dual MPPT** are available - this is important when dealing with different roof orientations or partial shading, as each string can independently optimize energy yield. High **European efficiency** translates to more energy delivered to the installation under typical operating conditions, not just in an ideal laboratory setting. WiFi **monitoring** and service communication (e.g., RS485/RS232) are available, facilitating diagnostics and integration with energy storage systems (including BMS in lithium batteries). This series is primarily targeted at residential, agricultural, and commercial installations, where independence and control are key. ## Questions ### Is the Easun Power ISOLAR-SMX-II inverter suitable for powering a home during a grid outage? Yes, the ISOLAR-SMX-II series is specifically designed for this purpose. It operates in off-grid mode and as an uninterruptible power supply (UPS), generating a clean sine wave, which allows it to safely power sensitive household appliances - such as household appliances, computers, or pumps. The power can come from solar panels, batteries, or an AC input (grid, generator), providing flexibility even during prolonged power outages. ### What is the MPPT range of the Easun ISOLAR-SMX-II inverter, and why is this important? Depending on the configuration, the ISOLAR-SMX-II series offers one or two independent MPPT (Maximum Power Point Tracking) controllers with a DC input voltage of up to 500 V. Two MPPT controllers are particularly useful when panels are mounted on different orientations or in partially shaded areas - each controller independently optimizes energy harvesting, which in practice means greater production even in less-than-ideal installation conditions. ### Does the Easun ISOLAR-SMX-II support LiFePO4 batteries, and how should the BMS be connected? Yes, the inverter supports LiFePO4 batteries, and communication with the BMS (Battery Management System) is achieved via RS485 or RS232 ports. Popular BMS systems, such as Pylontech, JK, and Daly, are supported. In the device's menu, you need to select the appropriate battery type (e.g., Li2 for Pylontech) and configure the communication protocol according to your BMS. This allows for full integration and protection of the battery from overcharging or excessive discharging. ### How does the WiFi monitoring function in the Easun ISOLAR-SMX-II series work? Models with the WIFI designation (e.g., ISOLAR-SMX-II-5.6KP-WIFI) include a built-in wireless module and work with the SmartESS application, available for iOS and Android. This allows you to remotely monitor PV production, battery charge status, power consumption, and adjust basic inverter operating parameters. This is a convenient solution for installations in vacation homes or facilities without constant monitoring. ### What is the warranty on Easun Power ISOLAR-SMX-II inverters? The manufacturer provides a standard warranty of 12 months. This is a relatively short period compared to European brands that offer 5 years or more. It is advisable to check whether an authorized distributor in Poland offers an extended warranty or after-sales service, as the manufacturer is based in China and direct service contact may be difficult. ### Is the Easun ISOLAR-SMX-II series still available for sale? The ISOLAR-SMX-II series has been discontinued by Easun Power in regular production. The inverters may still be available as stock items from select distributors or on the secondary market, but the manufacturer no longer actively sells this line. Individuals seeking a new device should consider the currently offered Easun series (e.g., SMG II or SMH III), which replace the ISOLAR-SMX-II and offer updated specifications. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/20230816005918ISolar-SMX-II-56KP-WifiManual-9e732fca5859.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Easun Power IGRID-VX-IV-5.6KW-WIFI](https://comparepv.com/inverter/easun-power-igrid-vx-iv-5-6kw-wifi) | 5.6 kW | | 1 | 10.5 kg | Similar on paper | | [Easun Power LSOLAR SML-II-5.6KW](https://comparepv.com/inverter/easun-power-lsolar-sml-ii-5-6kw) | 5.6 kW | | 1 | 12.0 kg | 1.5 kg heavier | | [Easun Power ISolar SMV IV 5600-48](https://comparepv.com/inverter/easun-power-isolar-smv-iv-5600-48) | 5.6 kW | | | | Similar on paper | | [Easun Power ISolar SMG II 5.6KW](https://comparepv.com/inverter/easun-power-isolar-smg-ii-5-6kw) | 5.6 kW | | | 10.0 kg | Similar on paper | | [Easun Power ISolar SMG II 5.6KP](https://comparepv.com/inverter/easun-power-isolar-smg-ii-5-6kp) | 5.6 kW | | | 10.0 kg | Similar on paper | | [Easun Power ISolar-SMX-II-5.6KW](https://comparepv.com/inverter/easun-power-isolar-smx-ii-5-6kw) | 5.6 kW | | | 10.9 kg | Similar on paper | | [Easun Power ISolar SMR II 5.5KW](https://comparepv.com/inverter/easun-power-isolar-smr-ii-5-5kw) | 5.5 kW | | | 12.1 kg | 1.6 kg heavier | | [PowMr POW-HVM5.5K-48V-LIP](https://comparepv.com/inverter/powmr-pow-hvm5-5k-48v-lip) | 5.5 kW | | | 9.9 kg | Similar on paper | --- Source: https://comparepv.com/inverter/easun-power-isolar-smx-ii-5-6kp-wifi