MIDEA M1-S3K (01) PDF MANUAL

The manual uses symbols to ensure the safety of persons and property. Please read through the following symbol explanations carefully in order to prevent injury or property damage.

DANGER

Non-observance will result in death or serious injury. Follow the warnings in order to prevent death or serious injury!

WARNING

Non-observance will result in death or serious injury. Follow the warnings in order to prevent serious injury!

CAUTION

Non-observance may result in minor injury. Follow the warnings in order to prevent injury!

ATTENTION

Non-observance may result in property damage! Follow the warnings in order to prevent damage to or destruction of the product.

NOTE

Provides tips essential to the optimal operation of the product.

Personnel tasked with the operation and maintenance of the device must have the qualifications, competence and experience required to perform the described tasks, while also being capable of fully understanding all instructions contained within the manual. For safety reasons, this inverter may only be installed by a qualified electrician who:

has received training on occupational safety, as well as the installation and commissioning of electrical systems.

is familiar with the local laws, standards and regulations of the grid operator.

Observe all applicable electrical regulations when working with the Solar inverter.

DANGER: Dangerous DC voltage

Before establishing the electrical connection, cover the PV modules using opaque material or disconnect the PV generator from the inverter. Solar radiation will cause dangerous voltage to be generated by the PV generator!

DANGER: Danger through electric shock!

All installations and electrical connections may only be carried out by trained electricians!

IMPORTANT: Authorization for grid feed-in

Obtain authorization from the local power grid operator before connecting the inverter to the public power grid.

NOTE: Voiding of guarantee

Do not open the inverter or remove any of the labels. Otherwise, the guarantee will be void.

DANGER: Dangerous voltage!

Before carrying out any repair work, first switch off the AC circuit breaker between the inverter and power grid, and then the DC switch.

After switching off the AC circuit breaker and the DC switch, wait a minimum of 5 minutes before starting any maintenance or repair work.

Electric shock

Contact with the electrical grid or the device’s terminals may result in an electric shock or fire!

Do not touch the terminal or the conductor which is connected to the electrical grid.

Follow all instructions and observe all safety documents that refer to the grid connection.

CAUTION: Burning due to hot housing

While the inverter is being operated, several internal components will become very hot.

Please wear protective gloves!

Keep children away from the device!

Following the elimination of any faults, the inverter should be fully functional once more. Should any repairs be required, please contact a local authorized service center.

The internal components of the inverter must NOT be opened without the relevant authorization.

The hardware and software after-sale service can be received from the authorized dealer. Software updates service will be available for warranty years from the manufacture date via the OTA(Over-The-Air) download technology.

Only 2 or 3 battery packs can be connected to one battery cluster. please configuring as required.

Under any connection, either grid-connection or off-grid application, please be sure that the potential voltage between N and PE line is not higher than 30V, otherwise, inverter will stop generating power.

The system is not suitable for supplying life-sustaining medical devices. It cannot guarantee backup power in all circumstances. The PV generator must be earthed in accordance with the requirements of the local power grid operator!

Declaration for Back-Up Function

1. For hybrid inverters, the electrical installation typically includes connection of the inverter to both PV modules and batteries. If there is no available power from batteries or PV modules in backup mode, the backup power supply will be automatically terminated. The inverters shall hold no liability for any consequences arising from failing to observe this instruction.

2. Normally, the Back-Up switching time is less than 3 s. However, some external factors may cause the system to fail on Back-Up mode. Therefore, the users must be aware of conditions and follow the instructions as below:

Do not connect loads that are dependent on a stable energy supply for a reliable operation.

Do not connect the loads whose total capacity is greater than the maximum Back-Up capacity.

Do not connect the loads that may cause very high start-up current surges, such as nonfrequency conversion air conditioning, vacuum cleaner or half-wave loads such as hair dryer, heat gun, hammer drill.

Due to the condition of the battery itself, battery current might be limited by some factors, including but not limited to the temperature and weather.

BACK-UP is not recommended if the PV system is not configured with batteries. Otherwise, the risk in system power usage is beyond the equipment manufacturer’s warranty scope.

When single overload protection occurs, the inverter can restart automatically; however, the restarting time will be extended if it happens several times.

When the grid is disconnected, the off-grid function of the inverter will be closed automatically if the load capacity exceeds the inverter’s rated power; to enable it, turn off the large loads and ensure the load power is less than the rated power of the inverter.

Declaration for Back-Up Overload Protection

The inverter will restart in case of overload protection. The time required for restarting will increase (5 min at most) if overload protection repeats. Try to reduce Back-Up load power within maximum limitation or remove the loads which may cause very high start-up current surges.

The data of the compatibility for backup of Hybrid Inverter are based on the test with batteries (-20 ~ 55 ℃, 5~100% SOC). For the actual application, please refer to the maximum output capacity of the battery used.

Mode1: Maximize Self-consumption

This mode is suitable for areas with high electricity tariff. When the PV power is sufficient, priority is given to the local load, and the excess electricity goes to energy storage, and if there is still energy left, it is sold to the grid. When the PV power is insufficient/there is no PV power, the battery is discharged for the local load, and when the battery discharge power and photovoltaic power can not meet the load demand, the insufficient power will be purchased from the grid.

Mode2: Maximize Feed-in

This mode is suitable for areas with high feed-in tariff. When the PV power is greater than the inverter capacity, the excess electricity will be stored by energy storage. When PV power is less than the inverter capacity, the excess electricity will be sold to the grid.

Mode3: Backup power

This mode is suitable for areas where grid outages occur frequently or to prevent grid outages. Reserved Backup SOC setting value can be adjusted, when battery SOC is less than reserved SOC value, battery can only be charged, until SOC reaches reserved value, the battery will be stopped charging; when SOC is larger than SOC setting value, battery will behave as Self-use mode.

Mode4: Charge and discharge schedule

This mode is suitable for areas with peaks and valleys in electricity prices Battery charging period and discharging period can be set, during charging period, battery can only be charged, while in discharging period, battery can only be discharged, the rest of the period, battery will behave as Self-use mode.

Mode5: Peak shaving

This function is to avoid exceeding peak kW limit from grid, by dynamically overriding the max kW limit on the battery. Users can set the peak kW value.

NOTE

If there is no power from PV, The inverter will take power from grid firstly.so it is normal that you will find 20-50W power from grid when the inverter is on standby mode.

The battery discharges to provide energy to loads. If the battery is empty or there is not enough power from the battery system, the grid shall supply power to backup loads and normal loads.

If the smart meter is abnormal or not equipped, the inverter will run normally, however, the battery can be charged but not allowed to discharge. In this case the feed-in limitation setting will be inactive.

Power deration is a way to protect the inverter from overload or potential faults. In addition, the deration function can also be activated following the requirements of the utility grid. Situations requiring inverter power deration are:

over-temperature (including ambient temperature and module temperature)

high input voltage

grid under-voltage

grid over-frequency

power factor (when values out of the rated values)

high altitude

The maximum allowable charge/discharge current is limited to the smaller value among: Temperature, the maximum power of inverter, and the maximum / recommended charge/discharge current from the battery manufacturer. The inverter cannot respond to discharge/charge command when operating off-grid.

Feed-in limitation function

The function of the feed-in limitation is to control the amount of power injected in the grid by the plant. This function requires a power measurement device must be installed. The sum of the feeding-in phases must not exceed the set power limitation value. The power of phases drawing power from the grid is disregarded here.

Charge-from-grid limitation function

The function of the Charge-from-grid limitation is to limit the amount of power charging the battery from the grid. This function requires a power measurement device to be installed. The sum of the Charge-from-grid phases must not exceed the set power limitation value. The power of phases drawing power from the grid is disregarded here.

The actual product received may differ from this list, which is for reference.

Energy manager*1

Smart meter + current transformer*1

D4 Disassembly tool*1

Photovoltaic connector – straight male*2 (BLACK)

Photovoltaic connector – straight female*2 (BLACK)

Battery connector – straight male*1 (BLUE)

Battery connector – straight female*1 (BLUE)

Multi-COM (2-RJ45+22pin)

Backup connector (BLACK)

Grid-connected connector (BLUE)

Ground terminal*2

Wireless module*1

Mounting bracket*1

Electric meter communication Line*1

Expansion bolt*4

SEM screw M4X12*4

RJ45 connector*1

Quick guide*1, Packing list*1, User manual*1, Delivery inspection report*1, Quality certificate*1, Warranty card*1

The following requirements should be met if the M1 series inverter is not put into use directly:

Do not unpack the M1 series inverter.

Keep the storage temperature at -40°C to +70°C and the humidity at 5%- 95% RH.

The M1 series inverter should be stored in a clean and dry place and be protected from dust and water vapor corrosion.

A maximum of 6 units can be stacked. To avoid personal injury or device damage, stack M1 series inverter with caution to prevent them from falling over.

Periodic inspections are required during the storage. Replace the packing materials if necessary.

If the M1 series inverter has been long-term stored, inspections and tests should be conducted by qualified personnel before it is put into use.

Basic environmental requirements

The Hybrid Inverter is protected to IP65 and can be installed indoors or out doors.

Do not install the Hybrid Inverter in a place where personnel are easy to come into contact with its enclosure and heat sinks, because these parts are extremely hot during operation.

Do not install the Hybrid Inverter in areas with flammable or explosive materials.

Do not install the Hybrid Inverter at a place within children’s reach.

Do not install the Hybrid Inverter outdoors in salt areas because it will be corroded there and may cause fire. A salt area refers to the region within 500 meters from the coast or prone to sea breeze.

The Hybrid Inverter must be installed in a well-ventilated environment to ensure good heat dissipation.

Recommended: Install the Hybrid Inverter in a sheltered place or a place with an awning.

Mounting requirements

The mounting structure where the Hybrid Inverter is installed must be fireproof.

Do not install the Hybrid Inverter on flammable building materials.

The Hybrid Inverter is heavy. Ensure that the installation surface is solid enough to bear the weight load.

In residential areas, do not install the Hybrid Inverter on drywalls or walls made of similar materials which have a weak sound insulation performance because the noise generated by the Hybrid Inverter is noticeable.

Angle Requirements

Install the inverter vertically with a backward tilt of less than 15 degrees. Never install the inverter horizontally, or at forward tilted, side tilted, or upside down.

Space Requirements

Reserve enough space around the inverter to ensure sufficient space for installation and heat dissipation.

Clearance above: ≥ 300mm

Clearance below: ≥ 500mm

Clearance on sides: ≥ 200mm

ATTENTION: Mechanical damage

In order to prevent injuries and damage to the device, ensure that the inverter is kept balanced while it is being moved – it is very heavy.

Do not place the inverter on its connections, as these are not designed to bear its weight. Place the inverter horizontally on the ground.

When you place the inverter on the ground, place foamed material or paper underneath it in order to protect its housing.

Step 1: Placing the wall-mounting bracket to a proper position on the wall. Use a spirit level to ensure the bubble is in the middle position. Mark the positions by marker and drill four holes (Ø8, Depth 45-50mm).

Step 2: Placing and fixing the expansion Bolts in the holes, and installing the mounting bracket. Tighten the nuts to 5±0.2Nm.

Step 3: Lift the inverter and slide it down along the wall mounting bracket to make sure they match perfectly. Use two screw sets (M4*10) to lock both left and right sides. Tighten the screws to 1.2±0.2Nm.

The connected PV modules must be compliant with IEC 61730 class A.

Recommended backup loads

Description of limits for DVC (decisive voltage classification)

Note: The values in brackets apply when the inverter is installed in a humid environment.

The values in the table are recommended values and can be set to other values according to actual conditions.

ATTENTIONS:

If local standard have other requirements for cables, set the cable specification according to the local standard.

The factors that affect cable selection include rated current, cable type, routing mode, ambient temperature, and maximum expected line loss.

The cabling distance between the battery and the inverter should be less than 10m, and within 5m is recommended.

Connect the inverter to the equipotential bonding bar by using the protective earth cable (PE) for grounding.

ATTENTION: Pole Grounding not permissible!

As the inverter is transformerless, the plus and minus poles of the PV generator must NOT be earthed. Otherwise, the inverter will malfunction.

Procedure:

1. Strip 6 mm of insulation from the 4 mm² ground cable. The exposed wire length should be 8-10 mm.

2. Insert the stripped end into a ring terminal and cover the connection with heat-shrink tubing.

3. Use a crimping tool to secure the ring terminal to the cable.

4. Locate the grounding terminal on the side of the inverter. Attach the ring terminal using the M4 screw and tighten to 1.2±0.2Nm.

The blue connector is for grid, and the black connector is for backup. Installation and line connection is the same. The AC disconnecting device must be easily accessible, and each inverter must have its own circuit breaker.

1. Prepare the AC cable by stripping the outer jacket to about 30-50mm.

2. Feed the cable through the AC connector components (cable gland, seal, housing).

3. Strip the individual conductors (L, N, PE) and connect them to the correct terminals inside the connector housing. Tighten the terminal screws to 1.2±0.2Nm.

4. Assemble the connector housing and screw the cable gland tight. Then, connect the AC connector to the corresponding AC port on the inverter by turning it clockwise until it clicks into place.

To connect the black backup connector, plug it into the AC BACKUP port until it clicks.

To connect the blue grid connector, plug it into the AC GRID port until it clicks.

To remove the AC connector, turn it anticlockwise.

NOTE: The connection steps for the battery and PV are the same, only the terminal specifications are different. The battery terminal is blue, and the PV terminal is black.

Installing the PV/Battery Connectors (on the cable):

1. Strip 7 mm of insulation from the 4 mm² DC cable.

2. Insert the stripped wire into the metal pin of the DC connector.

3. Use a crimping tool to secure the pin to the wire.

4. Insert the crimped pin into the connector housing (positive or negative) until it clicks.

5. Screw the end cap onto the connector housing.

6. Use an MC4 wrench to tighten the end cap securely.

Installing PV Connector to Inverter:

Step 1: Rotate the DC switch on the inverter to the “OFF” position.

Step 2: Check the cable connection of the PV string for polarity correctness and ensure the open circuit voltage in any case does not exceed the inverter input limit of 600V.

Step 3: Connect the PV connectors to the corresponding PV1 or PV2 terminals (positive to positive, negative to negative) until there is an audible click.

Installing Battery Connector to Inverter:

Connect the battery connectors to the corresponding BAT terminals (positive to positive, negative to negative) until there is an audible click.

NOTE: Insert the protective caps into the unused DC connections.

CAUTION: Danger of DC arcing

Before removing the plus and minus connector, ensure that the DC switch has been set to OFF.

The Enable cable along with the RJ45 cable are used for communication between the inverter and the Li-ion battery.

Step 1 (optional, if not using a pre-made cable):

Thread the communication cable (Ø4.8-6mm) through the waterproof component (nut, seal, housing). Strip the insulation layer of the cable with an Ethernet wire stripper. Insert the stripped communication cable into the RJ45 plug in the correct order, and crimp it with a crimper. Before installing the connector, tighten the waterproof cover.

Step 2:

Find the BMS terminal under the inverter. Insert the cable terminal into the BMS terminal, after confirming the RJ45 plug is inserted correctly, and then tighten the waterproof Screw cap.

The Current Transformer (CT) is usually installed on the L wire between the house loads and the power grid.

CT Parameters

Communication Terminal Definition

Smart meter with CT connection

Follow the electrical diagram to connect the smart meter and CT. The meter can be installed in the AC combiner box or other places that are unable to be touched by children.

Meter Terminals Definition

The energy meter is preconfigured. To change or check settings, use the buttons on the meter. A long-press enters setting mode, and a tap cycles through options. The sequence is: Set ID -> Set Baud rate -> Set primary current.

Procedure:

1. Remove the protective cap from the USB interface.

2. Install the Wireless stick.

3. Tighten the connecting nut.

Communication Port Definition (Multi-COM)

RJ45 Terminal Definition

Installing the cable and Multi-com

1. Prepare the wires by stripping about 12mm of insulation.

2. Disassemble the Multi-COM connector into its parts: nut, sealing screen, sealing ring, body, and housing.

3. Thread the prepared cables through the nut, sealing screen, and housing.

4. Insert the terminals into the body according to the pin definition table. Push until they click into place.

5. Assemble the body and housing, then push the entire assembly together until it clicks.

Installing the Multi-COM to inverter

Align the assembled Multi-COM connector with the COM port on the inverter and push it in until it clicks. Then screw the outer ring tight to secure it.

1. If a battery is connected, turn on the battery switch.

2. Turn on the AC switch between the inverter and the power grid.

3. Turn on the DC switch (if any) between the PV string and the inverter.

4. Turn on the DC switch at the bottom of the inverter.

5. Wait for about 1 minute and observe the LED indicators on the inverter to check its running status.

If the inverter needs to be shut down for electrical inspection, please follow the following steps:

1. Turn off the AC switch between the inverter and the power grid.

2. Turn off the DC switch at the bottom of the inverter.

3. If there is a DC switch between the inverter and PV string, turn off the DC switch.

4. Turn off the DC switch at the battery(Optional).

5. Wait for 5 minutes before checking the inverter.

Inverters do not generally require daily or routine maintenance. Before carrying out cleaning, ensure that the DC switch and AC circuit breaker between the inverter and power grid have been switched off. Wait at least 5 minutes before carrying out cleaning.

Cleaning the inverter

Clean the inverter using an air blower and a dry, soft cloth or a soft bristle brush. Do NOT clean the inverter with water, corrosive chemicals, cleaning agents etc.

Cleaning the heat sink

In order to help guarantee correct long-term operation of the inverter, make sure that there is sufficient space for ventilation around the heat sink. Check the heat sink for blockages (dust, snow etc.) and remove them if present. Please clean the heat sink using an air blower and a dry, soft cloth or a soft bristle brush. Do not clean the heat sink with water, corrosive chemicals, cleaning agents etc.

First, check the warnings, error messages or error codes displayed on the screen of the app.

If no error information is displayed on the screen, check whether the following requirements have been fulfilled:

Has the inverter been set up in a clean, dry, well-ventilated area?

Is the DC switch set to ON?

Are the cables sufficiently dimensioned and short enough?

Are the input connections, output connections and the wiring all in good condition?

Are the configuration settings for the relevant installation correct?

Are the the communication cables correctly connected and undamaged?

Removing the inverter

Before removing the inverter, power off the AC and DC (batteries).

1. Disconnect all cables from the inverter, including RS485 communications cables, DC input power cables, AC output power cables, and PGND cables.

2. Remove the inverter from the mounting bracket.

3. Remove the mounting bracket.

Packing the inverter

If the original packing materials are available, put the inverter inside them and then seal them by using adhesive tape.

If the original packing materials are not available, put the inverter inside a suitable cardboard box and seal it properly.

Disposing of the inverter

If the inverter service life expires, dispose of it according to the local disposal rules for electrical equipment waste. This product complies with EU WEEE Directive and bears a classification symbol for waster electrical and electronic equipment (WEEE). This symbol indicates that this product shall not be disposed with other household wastes at the end of its service life. Used device must be returned to official collection point for recycling of electrical electronic devices.