1. Introduction
This manual describes the assembly, installation, operation, and troubleshooting of the Sumry SP series multi-function inverter/charger. This unit combines the functions of an inverter, MPPT solar charger, and battery charger to provide uninterruptible power support in a portable size. Its comprehensive LCD display offers user-configurable and easy-to-access button operations for settings such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.
1.1. Features
- Pure sine wave inverter
- Programmable supply priority for PV, battery, or Grid
- High PV input voltage range (55~450VDC)
- Built-in Max 110A (3.8KW & 6.2KW) MPPT solar charger (80A for 3KW models)
- Compatible with lithium-ion batteries
- Supports BMS communication with Lithium batteries
- Smart battery charge design to optimize battery life
- Overload, high temperature, and inverter output short circuit protection
- Cold start function
- Intelligent fan speed adjustment
- WIFI & GPRS available for iOS and Android (Optional)
1.2. Basic System Architecture
The following illustration shows a basic application for this inverter/charger. It includes devices such as a generator or utility grid, and PV modules (optional), to form a complete running system. This inverter can power various home and office appliances, including motor-type appliances like tube lights, fans, refrigerators, and air conditioners.
1.3. Product Overview
The inverter features an LCD display, status indicators, charging indicators, fault indicators, and function buttons for easy operation and monitoring. The rear panel includes AC input/output, PV input, battery input, RS-232/RS485 communication port, and safety ground connections.
- LCD display
- Status indicator
- Charging indicator
- Fault indicator
- Function buttons
- Power on/off switch
- AC input
- AC output
- PV input
- Battery input
- RS-232/RS485 communication port
- Safety (Earth) ground
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 a battery.
- NEVER charge a frozen battery.
- For optimum operation of this inverter/charger, please follow the required specifications to select the 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 the installation procedure when you want to disconnect AC or DC terminals. Refer to the INSTALLATION section of this manual for details.
- 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.
3. Setup
3.1. Unpacking and Inspection
Before installation, please inspect the unit. Ensure that nothing inside the package is damaged. You should have received the unit and this user manual.
3.2. Preparation
Before connecting all wirings, remove the bottom cover by removing the two screws as shown in the product overview diagram.
3.3. Mounting the Unit
Consider the following points before selecting where to install the inverter:
- 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.
- The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
- The recommended installation position is to adhere to the wall vertically.
- Ensure sufficient space for heat dissipation and wire removal, as shown in the diagram below.
WARNING: Suitable for mounting on concrete or other non-combustible surfaces only.
3.4. Battery Connection
CAUTION: For safety and regulation compliance, it is recommended to install a separate DC over-current protector or disconnect device between the battery and inverter.
WARNING: All wiring must be performed by qualified personnel. It is very important for system safety and efficient operation to use appropriate cables for battery connection. To reduce the risk of injury, use the proper recommended cable and terminal size as specified below.
Follow these steps to implement battery connection:
- Assemble battery ring terminals based on recommended battery cable and terminal size.
- Connect all battery packs as required by the unit.
- Insert the ring terminal of the battery cable flatly into the battery connector of the inverter and ensure the bolts are tightened with a torque of 2-3 Nm. Ensure polarity at both the battery and the inverter/charger is correctly connected, and ring terminals are tightly screwed to the battery terminals.
WARNING: Shock Hazard. Installation must be performed with care due to high battery voltage in series.
CAUTION: Do not place anything between the flat part of the inverter terminal and the ring terminal. Otherwise, overheating may occur. Do not apply anti-oxidant substance on the terminals before terminals are connected tightly. Before making the final DC connection or closing the DC breaker/disconnector, ensure positive (+) is connected to positive (+) and negative (-) is connected to negative (-).
Recommended Battery Cable and Terminal Size:
| Model | Wire Size | Cable mm² | Ring Terminal D (mm) | Ring Terminal L (mm) | Torque Value |
|---|---|---|---|---|---|
| 3.8KW 24V | 1*3AWG | 22 | 6.4 | 33.2 | 2 Nm |
| 6.2KW 48V | 1*4AWG | 22 | 6.4 | 33.2 | 2 Nm |
Battery Compatibility:
The inverter is compatible with various battery types, including Flooded (FLD), Gel, Lithium-iron phosphate (LI), Lithium-ion (LI), AGM/Sealed (SLD), and user-customized batteries.
3.5. AC Input/Output Connection
CAUTION: Before connecting to an AC input power source, install a separate AC breaker between the inverter and the AC input power source. This ensures the inverter can be securely disconnected during maintenance and is fully protected from overcurrent. The recommended AC breaker specifications are 32A for 3.8KW and 50A for 6.2KW.
CAUTION: There are two terminal blocks with 'IN' and 'OUT' markings. 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 cables for AC input connection. To reduce the risk of injury, use the proper recommended cable size as below.
Follow these steps to implement AC input/output connection:
- Before making AC input/output connections, ensure the DC protector or disconnector is open.
- Remove insulation sleeve 10mm for six conductors. Shorten phase L and neutral conductor N by 3mm.
- Insert AC input wires according to polarities indicated on the terminal block and tighten the terminal screws. Ensure to connect the PE protective conductor (yellow-green), L (brown or black), and N (blue).
- Then, insert AC output wires according to polarities indicated on the terminal block and tighten the terminal screws. Ensure to connect the PE protective conductor, L, and N.
- Make sure the wires are securely connected.
WARNING: Be sure that the AC power source is disconnected before attempting to hardwire it to the unit.
Suggested Cable Requirement for AC Wires:
| Model | Gauge | Torque Value |
|---|---|---|
| 3.8KW | 12 AWG | 1.2~1.6 Nm |
| 6.2KW | 8 AWG | 1.4~1.6 Nm |
CAUTION: Appliances such as air conditioners require at least 2-3 minutes to restart to balance refrigerant gas. If a power shortage occurs and recovers quickly, it may damage connected appliances. Check the manufacturer's recommendations for time-delay functions before installation.
3.6. PV Connection
CAUTION: Before connecting to PV modules, install a DC circuit breaker separately 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 cables for PV module connection. To reduce the risk of injury, use the proper recommended cable size as below.
Follow these steps to implement PV module connection:
- Remove insulation sleeve 10 mm for positive and negative conductors.
- Check the correct polarity of the connection cable from PV modules and PV input connectors. Connect the positive pole (+) of the connection cable to the positive pole (+) of the PV input connector. Connect the negative pole (-) of the connection cable to the negative pole (-) of the PV input connector.
- Make sure the wires are securely connected.
Suggested Cable Requirement for PV Wires:
| Model | Wire Size | Cable (mm²) | Torque Value (max) |
|---|---|---|---|
| 3.8KW/6.2KW | 1 x 12AWG | 4 | 1.2 Nm |
PV Module Selection:
When selecting proper PV modules, consider these parameters:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter.
- Open circuit Voltage (Voc) of PV modules should be higher than the min. battery voltage.
| INVERTER MODEL | 3.8KW | 6.2KW |
|---|---|---|
| Max. PV Array Open Circuit Voltage | 450Vdc | |
| PV Array MPPT Voltage Range | 55Vdc~450Vdc | |
3.7. Circuit Breaker Specifications
Proper circuit breaker installation is critical for safety and system protection. The following specifications are recommended based on the inverter's power rating:
- For 3KW machine:
- Battery to Inverter: 2P100A
- Photovoltaic Input to Inverter: 2P10A
- Utility Input to Inverter: 2P32A
- Inverter Output: 2P15A
- For 3.8KW machine:
- Battery to Inverter: 2P150A
- Photovoltaic Input to Inverter: 2P20A
- Utility Input to Inverter: 2P40A
- Inverter Output: 2P20A
- For 6.2KW machine:
- Battery to Inverter: 2P150A
- Photovoltaic Input to Inverter: 2P20A
- Utility Input to Inverter: 2P63A
- Inverter Output: 2P30A
3.8. Final Assembly
After connecting all wirings, replace the bottom cover by screwing in the two screws.
4. Operation
4.1. Power ON/OFF
Once the unit has been properly installed and the batteries are connected, simply press the On/Off switch (located on the bottom of the case) to turn on the unit.
4.2. 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. These elements indicate the operating status and input/output power information.
LED Indicator Messages:
| LED Indicator | Color | Status | Messages |
|---|---|---|---|
| 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:
| Function Key | Description |
|---|---|
| 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 |
4.3. LCD Display Icons
The LCD displays various icons to provide information on input source, configuration, faults, output, and battery status. These icons help in quickly understanding the inverter's current state.
Input Source Information:
- AC: Indicates the AC input.
- PV: Indicates the PV input.
- 888.8: Indicates input voltage, input frequency, PV voltage, battery voltage, and charger current.
Configuration Program and Fault Information:
- 88: Indicates the setting programs.
- 88.8: Indicates warning and fault codes. Flashing indicates a warning code, while solid indicates a fault code.
Output Information:
- 888.8: Indicates output voltage, output frequency, load percent, load in VA, load in Watt, and discharging current.
Battery Information:
- Battery Level Icon: Indicates battery level by 0-24%, 25-49%, 50-74%, and 75-100% in battery mode and charging status in line mode.
Mode Operation Information:
- Utility Icon: Indicates unit connects to the mains.
- PV Panel Icon: Indicates unit connects to the PV panel.
- BYPASS: Indicates load is supplied by utility power.
- Charger Icon: Indicates the utility charger circuit is working.
- Inverter Icon: Indicates the DC/AC inverter circuit is working.
- Mute Icon: Indicates unit alarm is disabled.
4.4. LCD Setting
To enter setting mode, press and hold the ENTER button for 3 seconds. Use the UP or DOWN buttons to select setting programs (00-39), and then press ENTER to confirm or ESC to exit. Key settings include:
- 00 ESC: Exit setting mode.
- 01 Output Source Priority: Configure load power source priority (e.g., Solar first, SBU first).
- 02 Maximum Charging Current: Configure total charging current for solar and utility chargers (e.g., 10A, 20A, up to 110A).
- 03 AC Input Voltage Range: Select between Appliances (90-280VAC) or UPS (170-280VAC).
- 04 Power Saving Mode: Enable or disable.
- 05 Battery Type: Select between AGM, Flooded, or User-Defined.
- 06 Auto Restart when Overload: Enable or disable.
- 07 Auto Restart when Over Temperature: Enable or disable.
- 08 Output Voltage: Set output voltage (e.g., 220V, 230V, 240V).
- 09 Output Frequency: Set output frequency (50Hz or 60Hz).
- 11 Maximum Utility Charging Current: Set the maximum current drawn from utility for charging.
- 12 Setting Voltage Point back to Utility Source: When SBU priority is selected, define the battery voltage threshold to switch back to utility.
- 13 Setting Voltage Point back to Battery Mode: When SBU priority is selected, define the battery voltage threshold to switch back to battery mode.
- 16 Charger Source Priority: Configure charger source priority (e.g., Solar first, Solar and Utility, Only Solar).
- 18 Alarm Control: Enable or disable alarms.
- 19 Auto Return to Default Display Screen: Enable or disable automatic return to the default display.
- 20 Backlight Control: Turn backlight on or off.
- 22 Beeps while Primary Source is Interrupted: Enable or disable.
- 23 Overload Bypass: Enable or disable transfer to line mode during overload in battery mode.
- 25 Record Fault Code: Enable or disable fault code recording.
- 26 Bulk Charging Voltage (C.V voltage): Set for User-Defined battery type.
- 27 Floating Charging Voltage: Set for User-Defined battery type.
- 29 Low DC Cut-off Voltage: Set for User-Defined battery type.
- 31 Solar Power Balance: Enable or disable automatic adjustment of solar input power based on load.
- 33 Battery Equalization: Enable or disable.
- 34 Battery Equalization Voltage: Set for Flooded or User-Defined battery type.
- 35 Battery Equalized Time: Set for Flooded or User-Defined battery type.
- 36 Battery Equalized Timeout: Set for Flooded or User-Defined battery type.
- 37 Equalization Interval: Set for Flooded or User-Defined battery type.
- 39 Equalization Activated Immediately: Enable or disable immediate equalization.
4.5. Display Setting
The LCD display information can be cycled through by pressing the UP or DOWN keys. The selectable information includes input voltage, input frequency, PV voltage, MPPT charging current, MPPT charging power, battery voltage, output voltage, output frequency, load percentage, load in VA, load in Watt, DC discharging current, main CPU Version, and second CPU Version.
4.6. Operating Mode Description
The inverter supports various operating modes, including Standby/Power Saving mode, Fault mode, and Line mode, each with specific behaviors for power supply and charging.
5. Maintenance
5.1. Battery Equalization
The equalization function reverses the buildup of negative chemical effects like stratification and helps remove sulfate crystals from battery plates. It is recommended to equalize the battery periodically to maintain its overall capacity.
How to Apply Equalization Function:
First, enable the battery equalization function in LCD setting program 33. Then, you can apply this function by:
- Setting the equalization interval in program 37.
- Activating equalization immediately in program 39.
When to Equalize:
In the float stage, when the setting equalization interval is reached, or equalization is activated immediately, the controller will enter the Equalize stage.
Equalize Charging Time and Timeout:
In the Equalize stage, the controller supplies power to charge the battery until the battery voltage reaches the equalization voltage. Constant-voltage regulation is then applied to maintain this voltage until the set battery equalized time is reached.
If the battery equalized time expires and the battery voltage does not rise to the equalization voltage point, the charge controller will extend the battery equalized time until the battery achieves the equalization voltage. If the battery voltage is still lower than the equalization voltage when the battery equalized timeout setting is over, the charge controller will stop equalization and return to the float stage.
6. Troubleshooting
6.1. Fault Reference Code
The inverter displays fault codes to indicate specific issues. Refer to the table below for a list of fault codes and their meanings.
| Fault Code | Fault Event | Icon on |
|---|---|---|
| 01 | Fan is locked when inverter is off. | 01 |
| 02 | Over temperature | 02 |
| 03 | Battery voltage is too high | 03 |
| 04 | Battery voltage is too low | 04 |
| 05 | Output short circuited or over temperature is detected by internal converter components. | 05 |
| 06 | Output voltage is too high. | 06 |
| 07 | Overload time out | 07 |
| 08 | Bus voltage is too high | 08 |
| 09 | Bus soft start failed | 09 |
| 11 | Main relay failed | 11 |
| 51 | Over current or surge | 51 |
| 52 | Bus voltage is too low | 52 |
| 53 | Inverter soft start failed | 53 |
| 55 | Over DC voltage in AC output | 55 |
| 56 | Battery connection is open | 56 |
| 57 | Current sensor failed | 57 |
| 58 | Output voltage is too low | 58 |
6.2. Warning Indicator
The inverter displays warning codes to indicate potential issues that require attention. Refer to the table below for a list of warning codes and their meanings.
| Warning Code | Warning Event | Audible Alarm | Icon flashing |
|---|---|---|---|
| 01 | Fan is locked when inverter is on. | Beep three times every second | 01 |
| 03 | Battery is over-charged | Beep once every second | 03 |
| 04 | Low battery | Beep once every second | 04 |
| 07 | Overload | Beep once every 0.5 second | 07 |
| 10 | Output power derating | Beep twice every 3 seconds | 10 |
| 12 | Solar charger stops due to low battery. | 12 | |
| 13 | Solar charger stops due to high PV voltage. | 13 | |
| 14 | Solar charger stops due to overload. | 14 |
6.3. Troubleshooting Table
This table provides common problems, their possible causes, and recommended solutions.
| Problem | LCD/LED/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. Battery polarity is connected reversed. | 1. Check if batteries and the wiring are connected well. 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. (UPS→Appliance) |
| 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. |
| Fault code 07 | Overload error. The inverter is overload 110% and time is up. | Reduce the connected load by switching off some equipment. | |
| Fault code 05 | Output short circuited. | Check if wiring is connected well and remove abnormal load. | |
| Temperature of 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 02 | Internal temperature of inverter component is over 100°C. | Return to repair center. | |
| Buzzer beeps continuously and red LED lights up. | Fault code 03 | Battery is over-charged. | Check if spec and quantity of batteries meet requirements. |
| The battery voltage is too high. | Replace the fan. | ||
| Fault code 01 | Fan fault | 1. Reduce the connected load. 2. Return to repair center. | |
| Fault code 06/58 | Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac) | Return to repair center. | |
| Fault code 08/09/53/57 | Internal components failed. | Restart the unit, if the error happens again, please return to repair center. | |
| Fault code 51 | Over current or surge. | If the battery is connected well, please return to repair center. | |
| Fault code 52 | Bus voltage is too low. | ||
| Fault code 55 | Output voltage is unbalanced. | ||
| Fault code 56 | Battery is not connected well or fuse is burnt. |
7. Specifications
The following tables provide detailed technical specifications for the Sumry SP series inverters.
7.1. Line Mode Specifications
| INVERTER MODEL | 3.8KW 24V | 6.2KW 48V |
|---|---|---|
| Input Voltage Waveform | Sinusoidal (utility or generator) | |
| Nominal Input Voltage | 230Vac | |
| Low Loss Voltage | 170Vac±7V (UPS) / 90Vac±7V (Appliances) | |
| Low Loss Return Voltage | 180Vac±7V (UPS) / 100Vac±7V (Appliances) | |
| High Loss Voltage | 280Vac±7V | |
| High Loss Return Voltage | 270Vac±7V | |
| Max AC Input Voltage | 300Vac | |
| Nominal Input Frequency | 50Hz / 60Hz (Auto detection) | |
| Low Loss Frequency | 40±1Hz | |
| Low Loss Return Frequency | 42±1Hz | |
| High Loss Frequency | 65±1Hz | |
| High Loss Return Frequency | 63±1Hz | |
| Output Short Circuit Protection | Line mode: Circuit Breaker / Battery mode: Electronic Circuits | |
| Efficiency (Line Mode) | >95% (Rated R load, battery full charged) | |
| Transfer Time | 10ms typical (UPS) / 20ms typical (Appliances) | |
7.2. Inverter Mode Specifications
| INVERTER MODEL | 3.8KW 24V | 6.2KW 48V |
|---|---|---|
| Rated Output Power | 4.2KVA/3.8KW | 7.0KVA/6.2KW |
| Output Voltage Waveform | Pure Sine Wave | |
| Output Voltage Regulation | 230Vac±5% | |
| Output Frequency | 60Hz or 50Hz | |
| Peak Efficiency | 94% | |
| Overload Protection | 5s@≥150% load; 10s@110%~150% load | |
| Surge Capacity | 2* rated power for 5 seconds | |
| Nominal DC Input Voltage | 24Vdc | 48Vdc |
| Cold Start Voltage | 23.0Vdc | 46.0Vdc |
| Low DC Warning Voltage @load < 20% | 22.0Vdc | 44.0Vdc |
| @20% ≤ load < 50% | 21.4Vdc | 42.8Vdc |
| @load ≥ 50% | 20.2Vdc | 40.4Vdc |
| Low DC Warning Return Voltage @load < 20% | 23.0Vdc | 46.0Vdc |
| @20% ≤ load < 50% | 22.4Vdc | 44.8Vdc |
| @load ≥ 50% | 21.2Vdc | 42.4Vdc |
| Low DC Cut-off Voltage @load < 20% | 21.0Vdc | 42.0Vdc |
| @20% ≤ load < 50% | 20.4Vdc | 40.8Vdc |
| @load ≥ 50% | 19.2Vdc | 38.4Vdc |
| High DC Recovery Voltage | 29Vdc | 58Vdc |
| High DC Cut-off Voltage | 31Vdc | 62Vdc |
| No Load Power Consumption | <25W | <50W |
| Saving Mode Power Consumption | <10W | <15W |
7.3. Charge Mode Specifications
| INVERTER MODEL | 3.8KW 24V | 6.2KW 48V |
|---|---|---|
| Utility Charging Mode | ||
| Charging Current (UPS) @ Nominal Input Voltage | 80A | 80A |
| Bulk Charging Voltage (Flooded Battery) | 29.2 | 58.4 |
| Bulk Charging Voltage (AGM / Gel Battery) | 28.2 | 56.4 |
| Floating Charging Voltage | 27Vdc | 54Vdc |
| Charging Algorithm | 3-Step | |
| Solar Charging Mode | ||
| Rated Power | 6000W | 6000W |
| PV Charge Current | 110A | 110A |
| Efficiency | 98.0% max. | |
| Max. PV Array Open Circuit Voltage | 450Vdc | |
| PV Array MPPT Voltage Range | 55-450Vdc | |
| Min battery voltage for PV charge | ||
| Standby Power Consumption | 2W | |
| Battery Voltage Accuracy | +/-0.3% | |
| PV Voltage Accuracy | +/-2V | |
| Charging Algorithm | 3-Step | |
7.4. General Specifications
| INVERTER MODEL | 3.8KW 24V | 6.2KW 48V |
|---|---|---|
| Safety Certification | CE | |
| Operating Temperature Range | 0°C to 55°C | |
| Storage temperature | -15°C~60°C | |
| Dimension (D*W*H), mm | 423.4*290.4*100.7(mm) | 423.4*290.4*115.7(mm) |
| Net Weight, kg | 6.8KG | 7.8KG |
7.5. Additional Specifications (from seller description)
8. User Tips
- Battery Connection is Essential: This inverter must work with a battery. Ensure the battery is properly connected before connecting solar panels to prevent system malfunction.
- Communication Port Usage: The SP series machines have only one communication port (COMM port). You can choose to communicate via the WiFi module or the battery BMS, but only one method can be used at a time. If you intend to use the WiFi module, ensure it is purchased with the inverter or separately.
- Proper Circuit Breaker Sizing: Always refer to the 'Circuit Breaker Specifications' section (Section 3.7) for the correct sizing of circuit breakers for your specific inverter model (3KW, 3.8KW, or 6.2KW) to ensure safety and protection of the inverter and connected systems.
- Cold Start Function: The inverter includes a cold start function, allowing it to power on directly from batteries even without an AC input or solar power, useful in emergency situations.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your local dealer or the manufacturer directly. Keep your purchase receipt and product serial number handy for any support requests.
A detailed user manual in PDF format is also available for download. Please refer to the official product page or contact support for the link: User Manual (PDF)
