1. Introduction
This manual describes the assembly, installation, operation, and troubleshooting of the MFUZOP DT-1218M Hybrid Solar Inverter. Please read this manual carefully before installation and operation, and keep it for future reference.
This multi-function inverter/charger combines the functions of an inverter, solar charger, and battery charger to offer uninterruptible power support with a portable size. Its comprehensive LCD display offers user-configurable and easy-accessible button operation for settings such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.
This inverter can power all kinds of appliances in home or environment, including motor-type appliances such as tube lights, fans, refrigerators, and air conditioners.
This diagram illustrates the comprehensive solar power inverter system, showing connections for solar panels, a generator, mains power, the hybrid inverter, batteries (Lead-Acid/Lithium), and various household appliances (phone, laptop, kettle, drill, microwave, fridge). Key specifications for solar charging are Vmp: 30-240VDC, Max Solarvoltage: 300VDC, Max Solar Charging Current: 100A, and Best voltage Range(Vmp): 300-400VDC.
2. Safety Instructions
WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.
- Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
- CAUTION: To reduce the risk of injury, charge only deep-cycle lead-acid type rechargeable batteries. Other types of batteries may burst, causing personal injury and damage.
- Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
- To reduce the risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
- CAUTION: Only qualified personnel can install this device with battery.
- NEVER charge a frozen battery.
- For optimum operation of this inverter/charger, please follow required specifications to select appropriate cable size. It is very important to correctly operate this inverter/charger.
- Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
- Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please refer to the INSTALLATION section of this manual for details.
- One piece of 150A fuse is provided as over-current protection for the battery supply.
- GROUNDING INSTRUCTIONS: This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
- NEVER cause AC output and DC input short circuits. Do NOT connect to the mains when DC input short circuits.
- Warning!! Only qualified service persons are able to service this device. If errors still persist after following the troubleshooting table, please send this inverter/charger back to a local dealer or service center for maintenance.
The inverter features multi-layered protection against Short Circuit, Over-Load, Over Current, High Voltage, Over Voltage, Over-Temperature, Under Voltage, and Over Charge conditions, ensuring safe and reliable operation.
3. Product Overview
3.1 Features
- Pure sine wave inverter
- Configurable input voltage range for home appliances and personal computers via LCD setting
- Configurable battery charging current based on applications via LCD setting
- Configurable AC/Solar Charger priority via LCD setting
- Compatible with mains voltage or generator power
- Auto restart while AC is recovering
- Overload/Over temperature/short circuit protection
- Smart battery charger design for optimized battery performance
- Cold start function
3.2 Basic System Architecture
The following illustration shows the basic application for this inverter/charger. It also includes a generator or utility and PV modules to have a complete running system.
This system combines solar panels, a hybrid inverter, and LiFePO4 batteries to power home appliances with clean, renewable energy, illustrating a typical home installation.
3.3 Product Overview: LCD Screen and Back Panel
This image provides a detailed view of the inverter's components, including the front panel with LCD display, indicator LEDs (AC, INV, CHG, FAULT), and function buttons (DOWN, ESC, ENTER, UP). The side panels show the Power ON/OFF Switch and communication ports (COM Port RS485-2 for BMS, COM Port RS485-1 for External Communication/WiFi). The bottom panel illustrates the Photovoltaic (PV) input connection socket, AC power outlet (power input), AC Power Connection Socket (Standby Output/Continuous Output), AC input, and cooling fans.
The LCD display provides real-time information on input voltage, input frequency, PV voltage, charging current, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, DC discharging current, main board firmware version, and SCC firmware version.
4. Installation
4.1 Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the following items:
- DT-1218M hybrid solar inverter x1
- User manual (with warranty card and Certificate of Conformity) x1
- Mounting brackets and screws (for wall installation)
- Wiring labels (for PV, AC, and battery connections)
This image displays the items included in the package: the hybrid solar inverter, user manual, mounting brackets and screws, and wiring labels.
4.2 Preparation
Before connecting, please take off the bottom cover by removing two screws.4.3 Mounting the Unit
Consider the following points before selecting where to install:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install this inverter at eye level to allow the LCD display to be read at all times.
- For proper air circulation to dissipate heat, allow a clearance of approximately 20 cm to the sides and 50 cm above and below the unit.
- The ambient temperature should be between -10°C and 50°C to ensure optimal operation.
- The recommended installation position is to adhere the unit vertically to a wall.
- Be sure to keep other objects and surfaces clear to guarantee sufficient heat dissipation and enough space for removing wires.
WARNING: SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
Install the unit by screwing three screws:
- 1,2 Use M6*80mm expansion bolts.
- 3 Use M4 or M5.
4.4 Battery Connection
CAUTION: For safety operation and regulation compliance, it is requested to install a separate DC over-current protector or disconnect device between the battery and inverter. It may not be requested to have a disconnect device in some applications, however, it is still requested to have over-current protection installed. Please refer to typical amperage in the table below for required fuse or breaker size.
WARNING! All wiring must be performed by qualified personnel. It is very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce the risk of injury, please use the proper recommended cable and terminal size as below.
Recommended Battery Cable and Terminal Size:
| Model | Typical Amperage | Battery Capacity | Wire Size | Ring Terminal Dimensions D(mm) | Ring Terminal Dimensions L(mm) | Torque value |
|---|---|---|---|---|---|---|
| 2KVA | 88A | 100AH | 1*6AWG | 6.4 | 33.2 | 2~3 Nm |
| 2*10AWG | 6.4 | 23.8 | ||||
| 3KVA | 132A | 100AH | 1*4AWG | 6.4 | 33.2 | 2~3 Nm |
| 200AH | 2*8AWG | 6.4 | 29.2 | |||
| 3.6KVA | 165A | 200AH | 2*4AWG | 8.4 | 33.2 | 5Nm |
| 5KVA | 109A | 200AH | 1*2AWG | 6.4 | 39.2 | 2~3 Nm |
| 2*6AWG | 6.4 | 33.2 | ||||
| 5.5KVA | 121A | 200AH | 1*2AWG | 6.4 | 39.2 | 2~3 Nm |
| 2*6AWG | 6.4 | 33.2 | ||||
| 6.2KVA | 124A | 200AH | 1*2AWG | 8.4 | 39.2 | 5Nm |
| 2*4AWG | 8.4 | 33.2 | ||||
| 8KVA | 183.2A | 250AH | 1*2/0AWG | 8.4 | 51 | 5Nm |
| 11KVA | 228A | 250AH | 1*3/0AWG | 8.4 | 54 | 5Nm |
Please follow below steps to implement battery connection:
- Assemble battery ring terminal based on recommended battery cable and terminal size.
- Insert the battery wires flatly into battery connectors of the inverter and make sure the bolts are tightened with a torque of 2 Nm in a clockwise direction. Ensure polarity at both the battery and the inverter/charger is correctly connected and conductors are tightly screwed into the battery terminals. Recommended tool: #2 Pozi Screwdriver.
WARNING: Shock Hazard. Installation must be performed with care due to high battery voltage in series.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure positive (+) must be connected to positive (+) and negative (-) must be connected to negative (-).
4.5 AC Input/Output Connection
CAUTION!! Before connecting to an AC input power source, please install a separate AC breaker between the inverter and the AC input power source. This will ensure the inverter can be disconnected during maintenance and is fully protected from overcurrent of AC input. The recommended spec of breaker is 32A for 3KW and 50A for 5KW.
CAUTION!! There are two terminal blocks with "IN" and "OUT" markings. Please do NOT mis-connect input and output connectors.
WARNING! All wiring must be performed by qualified personnel. It is very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested Cable Requirement for AC Wires:
| Model | Gauge | Torque value |
|---|---|---|
| 2KVA | 14AWG | 0.8~1.0Nm |
| 3KVA | 12AWG | 1.2~1.6Nm |
| 3.6KVA | 12AWG | 1.2~1.6Nm |
| 5KVA | 10AWG | 1.4~1.6Nm |
| 5.5KVA | 10AWG | 1.4~1.6Nm |
| 6.2KVA | 10AWG | 1.4~1.6Nm |
| 8KVA | 8AWG | 1.4~1.6Nm |
| 11KVA | 8AWG | 1.4~1.6Nm |
Please follow below steps to implement AC input/output connection:
- Before making AC input/output connection, be sure to open the DC protector or disconnector first.
- Remove insulation sleeve 10mm for six conductors. Shorten phase L and neutral conductor N3 mm.
- Insert AC input wires according to polarities indicated on the terminal block and tighten the terminal screws. Be sure to connect the PE protective conductor (ground) first.
WARNING: Be sure that the AC power source is disconnected before attempting to hardwire it to the unit.
CAUTION: Appliances such as air conditioners require at least 2~3 minutes to restart because it's required to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check the manufacturer of the air conditioner if it's equipped with time-delay function. Otherwise, this inverter/charger will trigger an overload fault and cut off output to protect your appliance, but sometimes it still causes internal damage to the air conditioner.
4.6 PV Connection
PV Connection (Only applies for models with solar charger)
CAUTION: Before connecting to PV modules, please install a separate DC circuit breaker between the inverter and PV modules.
WARNING! All wiring must be performed by qualified personnel. It is very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below.
Typical Amperage and Gauge for PV Wires:
| Typical Amperage | Gauge | Torque Value |
|---|---|---|
| 30A | 12AWG | 1.4~1.6Nm |
PV Module Selection:
When choosing the right PV module, be sure to first consider the following requirements:
- The open circuit voltage (Voc) of the PV modules does not exceed the maximum PV array open circuit voltage of the inverter.
- The maximum supply voltage of the PV modules should be close to the optimal PV access voltage range of the inverter for best performance.
- If one PV module cannot meet this requirement, it is necessary to connect multiple PV modules in series.
Please follow below steps to implement PV module connection:
- Remove insulation sleeve 10 mm for positive and negative conductors.
- Suggest to put bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
- Fix wire cover to the inverter with supplied screws.
- Check correct polarity of wire from PV modules and PV input connectors. Then, connect the positive pole (+) of the connection wire to the positive pole (+) of the PV input connector. Connect the negative pole (-) of the connection wire to the negative pole (-) of the PV input connector. Screw two wires tightly in a clockwise direction. Recommended tool: 4mm blade screwdriver.
4.7 Final Assembly
After connecting all wirings, please put the bottom cover back by screwing two screws.
4.8 Communication Connection
- Please use the supplied communication cable to connect to the inverter and PC. Insert the bundled CD into a computer and follow on-screen instructions to install the monitoring software. For detailed software operation, please check the user manual of the software inside the CD.
- Wi-Fi Cloud Communication (Optional): Please use the supplied communication cable to connect to the inverter and Wi-Fi module. Download the APP and install it from the APP store, and refer to the "Wi-Fi Plug Quick Installation Guideline" to set up the network and register. The inverter status will be shown by the mobile phone APP or webpage of the computer.
- GPRS Cloud Communication (Optional): Please use the supplied communication cable to connect to the inverter and GPRS module, and then apply external to the GPRS module. Download the APP and install it from the APP store, and refer to the "GPRS RTU Quick Installation Guideline" to set up the network and register. The inverter status will be shown by the mobile phone APP or webpage of the computer.
5. Operation
5.1 Power On/Off
Once the unit has been properly installed and the batteries are connected well, simply press the On/Off switch (located on the button of the case) to turn on the unit.
5.1.1 Steps to Start Up
Connect the battery that meets the requirements (battery voltage needs to be beyond 23V) or AC (AC needs to confirm the suitable input range depending on the output mode), then you can start up the inverter.
- Mains Power On: Connect to normal AC power, press the switch, the system will automatically turn on. If you set AC output power priority, after waiting for a period of time, the panel will display AC mode that represents successful machine turn-on, then it will enter AC mode.
- Battery Boot: Connect to battery, press the power-on button to establish a working power source. The system will automatically turn on, after waiting for a period of time, the panel will display battery mode that represents successful machine turn-on, then it will enter battery mode.
5.1.2 Shutdown Steps
When the system is in battery mode or AC mode output, press the switch again, then the system will be turned off.
5.2 Operation and Display Panel
The operation and display panel, located on the front of the inverter, includes three indicators, four function keys, and an LCD display, indicating the operating status and input/output power information.
LED Indicator Meanings:
- AC/INV (Green): Solid On: Output is powered by utility in Line mode. Flashing: Output is powered by battery or PV in battery mode.
- CHG (Green): Solid On: Battery is fully charged. Flashing: Battery is charging.
- FAULT (Red): Solid On: Fault occurs in the inverter. Flashing: Warning condition occurs in the inverter.
Function Keys:
- ESC: To exit setting mode.
- UP: To go to previous selection.
- DOWN: To go to next selection.
- ENTER: To confirm the selection in setting mode or enter setting mode.
5.3 LCD Setting
After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Press the "UP" or "DOWN" button to select setting programs. Then, press the "ENTER" button to confirm the selection or the ESC button to exit.
Key LCD Setting Programs:
| Program | Description | Selectable Option |
|---|---|---|
| 00 | Exit setting mode | ESC |
| 01 | Output source priority selection | Solar energy first (Sub) / Solar energy first (Sbu) / Utility first (Utl) |
| 02 | Maximum charging current | 10A to 100A (default 60A) |
| 03 | AC input voltage range | Appliances (APL) / UPS |
| 05 | Battery type | AGM / Flooded (FLD) / User-Defined (USE) |
| 06 | Auto restart when overload occurs | Disable (Ltd) / Enable (LHE) |
| 07 | Auto restart when over temperature occurs | Disable (Erd) / Enable (LE) |
| 08 | ECO function | Disable (Sas) / Enable (SEN) |
| 09 | Output frequency | 50Hz / 60Hz |
| 10 | Output voltage | 220V / 230V / 240V |
| 11 | Maximum utility charging current | 2A to 60A (default 30A) |
| 12 | Setting voltage point back to utility source | 22V to 25.5V (3KVA) / 44V to 51V (5KVA) |
| 13 | Setting voltage point back to battery mode | 27V to 29V (3KVA) / 54V to 58V (5KVA) |
| 16 | Charger source priority | Utility first / Solar first / Solar and Utility / Only Solar |
| 18 | Alarm control | Alarm on / Alarm off |
| 19 | Auto return to default display screen | Return to default (ESP) / Stay at latest (HEP) |
| 20 | Backlight control | Backlight on (LON) / Backlight off (LOF) |
| 22 | Beeps while primary source is interrupted | Alarm on (AON) / Alarm off (AOF) |
| 23 | Overload bypass | Bypass disable / Bypass enable |
| 25 | Record Fault code | Record enable / Record disable |
| 26 | Bulk charging voltage (C.V voltage) | 25.0V to 31.5V (3KVA) / 48.0V to 61.0V (5KVA) |
| 27 | Floating charging voltage | 25.0V to 31.5V (3KVA) / 48.0V to 61.0V (5KVA) |
| 28 | Reset factory setting | Default |
| 29 | Low DC cut-off voltage | 21.0V to 24.0V (3KVA) / 42.0V to 48.0V (5KVA) |
| 30 | Battery equalization | Enable (EEN) / Disable (EdS) |
| 31 | Battery equalization voltage | 25.0V to 31.5V (3KVA) / 48.0V to 61.0V (5KVA) |
| 33 | Battery equalized time | 5min to 900min (default 60min) |
| 34 | Battery equalized timeout | 5min to 900min (default 120min) |
| 35 | Equalization interval | 0 to 90 days (default 30 days) |
| 36 | Equalization activated immediately | Enable (AEN) / Disable (AdS) |
| 37 | BMS Function Switch | Off / On |
| 38 | Bat Soc Under Lock | 10% to 120% (default 10%) |
| 39 | Bat Soc Turn To Ac | 10% to 120% (default 20%) |
| 40 | Bat Soc Turn To Dc | 10% to 120% (default 95%) |
| 41 | Bat Restart Soc | 10% to 120% (default 50%) |
| 43 | Solar supply priority | BLU / LBU |
| 44 | Solar energy feed to grid configuration | GHE / GHE |
| 45 | Reset PV energy storage | Reset |
| 46 | Start charging time for AC charger | 00:00 to 23:00 |
| 47 | Stop charging time for AC charger | 00:00 to 23:00 |
| 48 | Scheduled time for AC output on | 00:00 to 23:00 |
| 49 | Scheduled time for AC output off | 00:00 to 23:00 |
| 50 | Set country customized regulations | India / Germany / South America |
| 51 | Time setting - Minute | 00 to 59 |
| 52 | Time setting - Hour | 00 to 23 |
| 53 | Time setting - Day | 00 to 31 |
| 54 | Time setting - Month | 01 to 12 |
| 55 | Time setting - Year | 16 to 99 |
| 56 | GRID-tie current | 2A to 20A (default 10A) |
5.4 Battery Equalization Description
Equalization function is added into the charge controller to reverse the buildup of negative chemical effects like stratification, a condition where acid concentration is greater at the bottom of the battery than at the top. Equalization also helps to remove sulfate crystals that might have built up on the plates. If left unchecked, this condition, called sulfation, will reduce the overall capacity of the battery. Therefore, it's recommended to equalize the battery periodically.
How to Apply Equalization Function:
You must enable the battery equalization function in monitoring LCD setting program 30 first. Then, you may apply this function in the device by either one of the following methods:
- Setting equalization interval in program 35.
- Active equalization immediately in program 36.
5.5 Function and Alarm Description
5.5.1 Faults Descriptions
When the inverter enters fault mode, the red LED light is always on and the LCD displays the fault code.
| Fault Code | Fault Event |
|---|---|
| 01 | Fan is locked when inverter is off. |
| 02 | Over temperature or NTC is not connected well. |
| 03 | Battery voltage is too high. |
| 04 | Battery voltage is too low. |
| 05 | Output short circuited or over temperature is detected by internal converter components. |
| 06 | Output voltage is too high. |
| 07 | Over load time out. |
| 08 | Bus voltage is too high. |
| 09 | Bus soft start failed. |
| 51 | Over currents or surge. |
| 52 | Bus voltage is too low. |
| 53 | Inverter soft start failed. |
| 55 | Over DC voltage in AC output. |
| 57 | Current sensor failed. |
| 58 | Output voltage is too low. |
| 59 | PV voltage is over limitation. |
5.5.2 Warning Descriptions
When an alarm occurs, the red LED flashes, and the LCD displays an alarm code. The inverter does not enter failure mode.
| Warning Code | Warning Event | Audible Alarm |
|---|---|---|
| 01 | Fan is locked when inverter is on. | Beep three times every second |
| 02 | Over temperature | None |
| 03 | Battery is over-charged | Beep once every second |
| 04 | Low battery | Beep once every second |
| 07 | Overload | Beep once every 0.5 second |
| 10 | Output power derating | Beep twice every 3 seconds |
| 15 | PV energy is low. | Beep twice every 3 seconds |
| 16 | High AC input (>280VAC) during BUS soft start | None |
| EQ | Battery equalization | None |
| 6P | Battery is not connected | None |
5.5.3 Code Reference
Related information codes will be displayed on the LCD screen. Please check the inverter LCD screen for operation.
| Code | Description |
|---|---|
| 60 | If battery status is not allowed to charge and discharge after the communication between the inverter and battery is successful, it will show code 60 to stop charging and discharging battery. |
| 61 | Communication lost. After battery is connected, if communication signal is not detected for 3 minutes, the buzzer will beep. After 10 minutes, the inverter will stop charging and discharging to the lithium battery. If communication lost occurs after the inverter and battery are connected successfully, the buzzer beeps immediately. |
| 69 | If battery status is not allowed to charge after the communication between the inverter and battery is successful, it will show code 69 to stop charging battery. |
| 70 | If battery status must to charge after the communication between the inverter and battery is successful, it will show code 70 to charge battery. |
| 71 | If battery status is not allowed to discharge after the communication between the inverter and battery is successful, it will show code 71 to stop discharge battery. |
6. Troubleshooting
| Problem | LCD/LEDs/Buzzer | Explanation/Possible Cause | What to do |
|---|---|---|---|
| Unit shuts down automatically during startup process. | LCD/LEDs and buzzer will be active for 3 seconds and then complete off. | The battery voltage is too low (<1.91V/Cell). | 1. Re-charge battery. 2. Replace battery. |
| No response after power on. | No indication. | 1. The battery voltage is far too low (<1.4V/Cell). 2. Internal fuse tripped. | 1. Contact repair center for replacing the fuse. 2. Re-charge battery. 3. Replace battery. |
| Input voltage is displayed as 0 on the LCD and green LED is flashing. | Input protector is tripped. | Check if AC breaker is tripped and AC wiring is connected well. | |
| Mains exist but the unit works in battery mode. | Green LED is flashing. | Insufficient quality of AC power (Shore or Generator). | 1. Check if AC wires are too thin and/or too long. 2. Check if generator (if applied) is working well or if input voltage range setting is correct. |
| Green LED is flashing. | Set "Solar First" as the priority of output source. | Change output source priority to Utility first. | |
| When the unit is turned on, internal relay is switched on and off repeatedly. | LCD display and LEDs are flashing. | Battery is disconnected. | Check if battery wires are connected well. |
| Buzzer beeps continuously and red LED is on. | Fault code 07 | Overload error. The inverter is overloaded 105% and time is up. | Reduce the connected load by switching off some equipment. |
| If PV input voltage is higher than specification, the output power will be derated. At this time, if connected loads are higher than derated output power, it will cause overload. | Reduce the number of PV modules in series or the connected load. | ||
| Fault code 05 | Output short circuited. | Check if wiring is connected well and remove abnormal load. | |
| Fault code 02 | Temperature internal converter component is over 120°C. | Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. | |
| Fault code 03 | Battery is over-charged. The battery voltage is too high. | Return to repair center. Check if specifications and quantity of batteries are met. | |
| Fault code 01 | Fan fault. | Replace the fan. | |
| Fault code 06/58 | Output abnormal (Inverter voltage below 190Vac or higher than 260Vac). | 1. Reduce the connected load. 2. Return to repair center. | |
| Fault code 08/09/53/57 | Internal components failed. | Return to repair center. | |
| Fault code 51 | Over current or surge. | Restart the unit. If the error happens again, return to repair center. | |
| Fault code 52 | Bus voltage is too low. | ||
| Fault code 55 | Output voltage is unbalanced. | ||
| Fault code 59 | PV input voltage is beyond the specification. | Reduce the number of PV modules in series. |
7. Technical Specifications
This table details the inverter's input, output, battery, and charger specifications, including model, rated power, voltage ranges, frequencies, waveforms, and efficiencies.
This table continues the technical specifications, covering protection functions (Overload, Short Circuit, Overvoltage, Undervoltage, Overheating, Reverse Polarity), operating and storage temperatures, noise level, maximum altitude, relative humidity, dimensions (W×H×D), packaging dimensions, net weight, and gross weight.
Key Specifications Summary:
- Model Number: DT-1218M
- Type: Solar Inverter
- Rated Output Power: 1800W
- Max PV Input Power: 2500W
- MPPT Tracking Voltage Range: 30V-240V DC
- Rated PV Input Voltage: 180V DC
- Maximum PV Input Voltage: 300V DC
- MPPT Channel: 1
- Battery Type: Lead-Acid/Lithium (Adjustable)
- Rated Battery Voltage: 12V DC
- Battery Charging Voltage Range: 10.5V-15.5V DC (Default 14.2V)
- Maximum Battery Charging Current: 100A
- Maximum Grid Charging Current: 65A
- Maximum Charging/Discharging Current: 100A
- Rated Output Voltage: 220V/230V/240V AC (Default 230V)
- Output Voltage Range: 176V-264V AC
- Rated Output Frequency: 50Hz/60Hz (Default 50Hz)
- Output Waveform: Pure Sine Wave
- Maximum Efficiency: 94% (At Rated Power)
- Display: LCD + LED Indicators
- Heat Dissipation: Intelligent Temperature Control Fan
- Communication Interface: RS485/WiFi (Optional)
- Protection Level: IP20
- Relative Humidity: 0%-95% (Non-Condensing)
- Dimensions (W*H*D): 310mm*250mm*91mm
- Net Weight: 4kg
- Gross Weight: 5.0kg
- Certification: CE, FCC, RoHS
8. User Tips
No specific user tips were available from reviews or Q&A. However, based on the product's features, here are some general tips:
- Optimal PV Input: To maximize efficiency, ensure your PV array's open circuit voltage (Voc) is within the recommended MPPT tracking voltage range (30V-240V DC) and close to the optimal PV access voltage (300-400VDC).
- Battery Compatibility: This inverter supports both Lead-Acid and Lithium batteries. Ensure the correct battery type is selected in the LCD settings for proper charging and discharge management.
- Proper Ventilation: Maintain adequate clearance (20 cm to sides, 50 cm above/below) around the inverter to allow the intelligent fan to dissipate heat effectively and prevent overheating.
- Wiring Safety: Always use the recommended cable sizes and torque values for battery, AC, and PV connections to ensure safety and optimal performance. Double-check all polarities before making final connections.
- Monitoring: Utilize the optional WiFi or GPRS communication modules to monitor your system's performance and status remotely via the mobile app or web interface.
9. Warranty and Support
For detailed warranty information and support, please refer to the user manual PDF provided with your product. The PDF contains comprehensive information regarding warranty terms, service procedures, and contact details for technical support.
You can access the official user manual PDF at: MFUZOP DT-1218M User Manual (PDF)
WiFi Data Logger Connection
The WiFi data logger is connected via the RS485 interface. The WiFi data logger's serial number is printed on the label and the device itself.
Website: Please contact the seller for the website to get the WiFi data logger software.
Mobile App: "Solar Things" (Available on App Store for iOS users)
Note: Scan the QR code on the product or packaging to download the app and follow the instructions to configure the WiFi connection.