EH SERIES USER MANUAL HYBRID INVERTER

01 INTRODUCTION

GoodWe EH series, also called hybrid or bidirectional solar inverters, apply to solar systems with participation of PV, battery, loads, and grid system for energy management. The energy produced by the PV system is used to optimize self-consumption, excess power charges the battery, and the rest of the power could be exported to the grids. The battery discharges to support loads when PV power is insufficient to meet self-consumption. If both PV power and battery power are insufficient, the system will draw power from the grid to support loads.

In addition, the EH Series includes a Battery-Ready inverter that has no battery function until it is activated. If your inverter is Battery-Ready and not activated now, you can ignore the following battery-related content.

Note: The introduction describes a general behavior of the EH system. The operation mode can be adjusted on the GoodWe PV Master APP based on the system layout. Below are the general operation modes for the EH system.

1.1 OPERATION MODES INTRODUCTION

The EH system normally has the following operation modes based on your configuration and layout conditions:

• Mode I: The energy produced by the PV system is used to optimize self-consumption. The excess energy is used to charge the batteries, then exported to the grid.
• Mode II: When there is no PV, and the battery is sufficient, it can supply the load with the grid together.
• Mode III: When the grid fails, the system automatically switches to Back-Up mode. The Back-Up load could be supported by PV and battery.
• Mode IV: The battery could be charged by the grid, and charge time/power could be set flexibly on the PV Master APP.

1.2 SAFETY & WARNINGS

The EH series hybrid inverter of Jiangsu GoodWe Power Supply Technology Co., Ltd. (hereinafter called as GoodWe) strictly complies with related safety rules for product design and testing. Please read and follow all the instructions and cautions on the hybrid inverter or user manual during installation, operation, or maintenance, as any improper operation might cause personal injury or damage.

SYMBOLS EXPLANATION

• ? Caution! Failing to observe a warning indicated in this manual may result in injury.
• ⚡ Danger of high voltage and electric shock!
• ? Danger of hot surface!
• Components of the product can be recycled.
• ⬆️ This side up! The package must always be transported, handled, and stored in such a way that the arrows always point upwards.
• No more than six (6) identical packages being stacked on each other.
• Product should not be disposed of as household waste.
• The package/product should be handled carefully and never be tipped over or slung.
• Refer to the operating instructions.
• Keep dry! The package/product must be protected from excessive humidity and must be stored under cover.
• Inverter will be touchable or operable after a minimum of 5 minutes of being turned off or totally disconnected, in case of any electrical shock or injury.
• CE Mark

SAFETY WARNING

• Any installation and operation on the hybrid inverter must be performed by qualified electricians, in compliance with standards, wiring rules, or requirements of local grid authorities or companies (like AS 4777 and AS/NZS 3000 in Australia).
• Prohibit to insert or pull the AC and DC terminals when the inverter is running.
• Before any wiring connection or electrical operation on the inverter, all battery and AC power must be disconnected from the inverter for at least 5 minutes to ensure the inverter is totally isolated to avoid electric shock.
• The temperature of the inverter surface might exceed 60°C during working, so please make sure it is cooled down before touching it, and make sure the inverter is untouchable for children.
• Do not open the inverter cover or change any components without GoodWe's authorization; otherwise, the warranty commitment for the inverter will be invalid.
• Usage and operation of the inverter must follow instructions in this user manual; otherwise, the protection design might be useless, and the warranty for the inverter will be invalid.
• Appropriate methods must be adopted to protect the inverter from static damage. Any damage caused by static is not warranted by GoodWe.
• PV negative (PV-) and battery negative (BAT-) on the inverter side are not grounded as default design. Connecting PV- or BAT- to EARTH are strictly forbidden.
• PV modules used on the inverter must have an IEC61730 class A rating, and the total open-circuit voltage of the PV string/array must be lower than the maximum rated DC input voltage of the inverter. Any damage caused by PV over-voltage is beyond warranty.
• The inverter, with a built-in RCMU, will exclude the possibility of DC residual current to 6mA, thus an external RCD (type A) can be used (≥30mA).
• In Australia, the inverter's internal switching does not maintain neutral integrity, which must be addressed by external connection arrangements like in the system connection diagram for Australia on page 16.
• In Australia, the output of the Back-Up side in the switchbox should be labeled 'Main switch UPS supply', and the output of the normal load side in the switchbox should be labeled 'main switch inverter supply'.

1.3 PRODUCT OVERVIEW

HYBRID LED INDICATORS

Components: PV Terminals, Battery Terminals, DC Switch, Wi-Fi Box, BMS Communication Cable, To Smart Meter, Smart Meter Communication Cable, To Battery, Meter, On-Grid Port, Back-Up Port, Reserved RS485, DRED.

Wi-Fi Reset: Short press RESET button for less than 3 seconds. Wi-Fi LED will blink for a few seconds.

02 INSTALLATION INSTRUCTIONS

2.1 UNACCEPTABLE INSTALLATIONS

• BACK-UP CANNOT CONNECT IN PARALLEL.
• SINGLE PV STRING CANNOT CONNECT TO TWO OR MORE INVERTERS.
• ONE METER CANNOT CONNECT TO MULTI INVERTERS, AND DIFFERENT CT CANNOT CONNECT TO A SAME FIER CABLE.
• ONE BATTERY BANK CANNOT BE CONNECTED TO MULTI INVERTERS.
• ON-GRID OR BACK-UP SIDE CANNOT CONNECT TO ANY AC GENERATOR.
• INVERTER BATTERY CANNOT CONNECT TO INCOMPATIBLE BATTERIES.
• BACK-UP SIDE CANNOT CONNECT TO GRID.

2.2 PACKING LIST

On receiving the hybrid inverter, please check to make sure all the components as below are not missing or broken. Of course, there are no Smart Meter and Smart Meter User Manual if you buy a Battery-Ready inverter without the Smart Meter.

Components included: Inverter ×1, Wall-mounted Bracket ×1, Smart Meter & CT × 1, Positive PV Plug ×2, Negative PV Plug ×2, Positive BAT Plug ×1, Negative BAT Plug ×1, Back Up AC Plug ×1, On Grid AC Plug ×1, PE terminal ×1, Expansion bolts ×4, User manual ×1, Quick Installation Guide ×1.

2.3 MOUNTING

2.3.1 SELECT MOUNTING LOCATION

For inverter's protection and convenient maintenance, the mounting location for the inverter should be selected carefully based on the following rules:

• Any part of this system shouldn't block the switch and breaker to disconnect the inverter from DC and AC power.
• Rule 1: Inverter should be installed on a solid surface, suitable for the inverter's dimensions and weight.
• Rule 2: Inverter installation should stand vertically or lie on a slope by a maximum of 15° (Pic 1).
• Rule 3: Ambient temperature should be lower than 45°C.
• Rule 4: The installation of the inverter should be protected under shelter from direct sunlight or bad weather like snow, rain, lightning, etc. (Pic 2).
• Rule 5: Inverter should be installed at eye level for convenient maintenance.
• Rule 6: Product label on the inverter should be clearly visible after installation.
• Rule 7: Leave enough space around the inverter following the values on Pic 3 (Upward: 300mm, Downward: 500mm, Front: 300mm, Both sides: 200mm).

Note: Inverter cannot be installed near flammable, explosive, or strong electro-magnetic equipment.

2.3.2 MOUNTING

Remember that this inverter is heavy! Please be careful when lifting it out of the package.

The inverter is suitable for mounting on concrete or other non-combustible surfaces only.

• Step 1: Please use the mounting bracket as a template to drill 4 holes (10mm in diameter, 80mm in depth). Use expansion bolts from the accessory box and fix the mounting bracket onto the wall tightly. Note: Bearing capacity of the wall must be higher than 17kg, otherwise, it may not be able to keep the inverter from dropping.
• Step 2: Carry the inverter by holding the heatsink on two sides and place the inverter on the mounting bracket. Note: Make sure the heatsink on the inverter is correctly aligned with the mounting bracket.
• Step 3: The ground cable shall be connected to the ground plate on the grid side.
• Step 4: A lock could be used for anti-theft if it is necessary for individual requirements.

2.4 ELECTRICAL WIRING CONNECTION

2.4.1 PV WIRING CONNECTION

Before connecting PV panels/strings to the inverter, please ensure the following requirements are met:

• The total short-circuit current of the PV string must not exceed the inverter's max DC current.
• The minimum isolation resistance to ground of the PV string must exceed 19.33 kΩ in case of any shock hazard.
• PV strings cannot connect to the earth/grounding conductor.
• Use the right PV plugs in the accessory box. (BAT plugs are similar to PV plugs; please confirm before use.)

Note: There will be MC4 or Amphenol plugs in the accessory box. The detailed connection is as follows:

• Step 1: Prepare PV cables and PV plugs.
• Step 2: Connect PV cables to PV connectors. Note: PV cable must be tightly crimped into the connectors. For Amphenol connectors, the limit buckle cannot be pressed. There will be a click sound if connectors are inserted correctly into PV plugs.
• Step 3: Screw the cap on and plug onto the inverter side. Note: There will be a click sound if connectors are inserted correctly into PV plugs.

Warning: The polarity of PV strings or on the inverter cannot be connected reversely; otherwise, the inverter could be damaged.

2.4.2 BATTERY WIRING CONNECTION

If your inverter is Battery-Ready, do not connect the battery to the inverter before activating the battery function, otherwise, it will stop working! Do not remove the battery plug and save the battery terminals; if lost, contact GOODWE for replacement.

• Please be careful against any electric shock or chemical hazard.
• Make sure there is an external DC breaker (≥40A) connected for the battery if it does not have a built-in DC breaker.
• Make sure the battery breaker is off and the battery nominal voltage meets EH specifications before connecting the battery to the inverter, and ensure the inverter is totally isolated from PV and AC power.

Please follow the steps below strictly. Using improper wire may cause bad contact and high impedance, which is dangerous to the system.

• Use the right BAT plugs in the accessory box.
• Use tin-plated cables with a conductor cross-section of 4 to 6 mm² (AWG 10) because the maximum battery current is 25A. Battery cable requirements are as shown (Pic 11).

Battery wiring connection process:

• Step 1: Open the spring using a screwdriver.
• Step 2: Carefully insert the stripped wire with twisted litz wires all the way in. The litz wire ends must be visible in the spring. Close the spring, ensuring it snaps in.
• Step 3: Push the insert into the sleeve. Tighten the cable gland to 2 Nm. Use a suitable and calibrated torque wrench (size 15). Use an open-jaw wrench (size 16) to hold the connector in place.
• Step 4: Fit the two connectors together until the connection audibly locks into place. Check to make sure the connection is securely locked.

Note: For compatible lithium batteries (Pylon/BYD), please refer to the battery connection part in the EH QUICK INSTALLATION INSTRUCTIONS.

Note: If you don't use the back-up function or use on-grid power to charge the battery, the wiring conduct core section can use 4-6mm².

2.4.3 ON-GRID & BACK-UP CONNECTION

An external AC breaker is needed for On-Grid connection to isolate from the grid when necessary. Below are the requirements for the On-Grid AC breaker:

1. Use a separate AC breaker for each individual inverter.

2. On the AC side, the individual breaker should be connected before the loads (between the inverter and loads).

Requirement of AC cable connected to On-Grid and Back-Up side:

• Note: Make sure the inverter is totally isolated from any DC or AC power before connecting the AC cable.
• Note 1: The choice of AC cable needs to meet both the outside diameter and conduct core section requirements. Please refer to the table for selecting the AC cable.
• Note 2: Neutral cable shall be blue, line cable is black or brown (preferred), and protective earth cable is yellow-green.
• Note 3: For AC cables, the PE cable shall be longer than the N & L cables, so that if the AC cable slips or is taken out, the protecting earth conductor will be the last to take the strain.

On-Grid wiring connection process:

• Step 1: Prepare the AC cable according to the table.
• Step 2: Prepare the terminals and AC cables. Put the AC cable through the terminal cover and screw the three cables tightly onto the connectors. Note: Please use the terminals in the GoodWe components box. Make sure the cable jacket is not locked with the conductor.
• Step 3: Lock the terminal cover and screw up the terminal cap. Note: Make sure the terminal cover is rightly locked onto the terminal.
• Step 4: Connect the assembled AC terminals onto the inverter. Note: Make sure it is connected to the 'On-Grid' side (the other side connected to the public grid).

Back-Up wiring connection process:

• Step 1: Prepare the terminals and AC cables according to the table.
• Step 2: Put the AC cable through the terminal cover and screw the three cables tightly onto the connectors. Note: Please use the terminals in the GoodWe components box. Make sure the cable jacket is not locked with the conductor.
• Step 3: Lock the terminal cover and screw up the terminal cap. Note: Make sure the terminal cover is rightly locked onto the terminal.
• Step 4: Connect the assembled AC terminals onto the inverter. Note: Make sure it is connected to the 'Back-Up' side (the other side connected to the public grid). Press the button and hold it to unlock when unplugging AC terminals.

Note: The absence of an AC breaker on the Back-Up side will lead to inverter damage if an electrical short-circuit happens on the Back-Up side. And the Back-Up function cannot turn off under On-Grid condition. An external AC breaker (≥32A) is needed for Back-Up connection to isolate when necessary.

Special Adjustable Setting: The inverter has adjustable settings like tripping point, tripping time, reconnect time, active and invalid of QU/PU curves, etc., via special firmware. Please contact GoodWe after-sales for the special firmware and adjustment methods.

Connection For SPLIT Grid System: In a SPLIT grid system, there is a solution allowing the inverter to work under On-Grid condition. However, the export power and load power might be detected inaccurately as the nominal output power of the inverter is 230V, and there could be loads of 110V or 220V.

Declaration For Back-Up Function: The below statement outlines GoodWe's general policies governing the energy storage inverters of the series ES, EM, SBP, ET, EH, and BH.

1. For Hybrid inverters (Series ES, EM, EH, and ET), the standard PV installation typically consists of the connection of the inverter with both panels and batteries. In case of systems not connected to the batteries, the Back-Up function is strongly not advised to use. GoodWe shall not cover the standard warranty and shall not be liable for any consequences arising from users not following this instruction.
2. Under normal circumstances, the Back-Up switching time is less than 10 ms (the minimal condition to be considered as the UPS level). However, some external factors may cause the system to fail in Back-Up mode. As such, we recommend users to be aware of conditions and follow the instructions below:
   • Do not connect loads that are dependent on a stable energy supply for reliable operation.
   • Do not connect loads that may, in total, exceed the maximum Back-Up capacity.
   • Try to avoid loads that may create very high start-up current surges, such as inverter air conditioners, high-power pumps, etc.
   • Due to the condition of the battery itself, battery current might be limited by some factors, including but not limited to temperature, weather, etc.

Declaration For Back-Up Loads: EH series hybrid inverters are able to supply overload output at its' Back-Up. For details, please refer to the technical parameters of the EH series inverter (4.3 section). The inverter has self-protection derating at high ambient temperature.

Accepted loads:

• Inductive Load: 1.5P non-frequency conversion air-conditioners can be connected to the back-up side. Two or more non-frequency conversion air-conditioners connected to the back-up side may cause UPS mode instability.
• Capacitive Load: Total power ≤ 0.6 x nominal power of the model. (Any load with high inrush current at start-up is not accepted.)
• For complicated applications, please contact GoodWe's after-sales service.

Note: For convenient maintenance, a DP3T support could be installed on the Back-Up and On-Grid side. It can then be adjusted to support the load by Back-Up or by the grid, or simply left there.

Declaration For Back-Up Overload Protection: The inverter will restart itself if overload protection occurs. The preparation time for restarting will be longer and longer (max one hour) if overload protection repeats. Take the following steps to restart the inverter immediately:

• Decrease the Back-Up load power within the maximum limitation.
• On PV Master → Advanced Setting → Click “Reset Back-Up Overload History”.

2.4.4 SMART METER & CT CONNECTION

Warning: Make sure the AC cable is totally isolated from AC power before connecting the Smart Meter & CT.

If you purchased a Battery-Ready inverter without the Smart Meter, you do not need to view this section. The Smart Meter with CT included in the GoodWe product box is compulsory for EH system installation. It is used to detect grid voltage, current direction, and magnitude, thereby instructing the operation condition of the EH inverter via RS485 communication.

• Note: The Smart Meter and CT are pre-configured; please do not change any settings on the Smart Meter.
• One Smart Meter can only be used for one EH inverter.
• CT must be connected in the same direction as indicated on the CT.

Note:

• Please use the Smart Meter with CT from the GoodWe product box.
• The CT cable is 3m by default and can be extended to a maximum of 5m.
• The Smart Meter communication cable (RJ45) is attached to the inverter (labeled "To Smart Meter" cable) and can be extended to a maximum of 100m, using standard RJ45 cable and plugs.

Smart Meter LED Indications:

2.5 DRED & REMOTE SHUTDOWN CONNECTION

DRED is used for Australia and New Zealand installation (also used as a remote shutdown function in European countries), in compliance with Australia and New Zealand safety requirements (or European countries). The DRED device is not provided by GoodWe.

Detailed connection of DRED device:

• Step 1: Screw this plate off from the inverter. Note: The DRED device should be connected through the “DRED port” as shown in the figure.
• Step 2: Plug out the 6-pin terminal and dismantle the resistor on it. Plug the resistor out, leaving the 6-pin terminal for the next step. Note: The 6-pin terminal in the inverter has the same function as the DRED device. Please leave it on the inverter if no external device is connected.
• Step 3-1 For DRED:
  • Put the DRED cable through the plate as shown.
  • Connect the DRED cable to the 6-pin terminal. The function of each connection position is as follows: NO 1 2 3 4 5 6 Function DRM1/5 DRM2/6 DRM3/7 DRM4/8 COM/DRMO
• Step 3-2 For Remote Shutdown:
  • Put the cable through the plate as shown.
  • Wiring from the No. 5 and 6 holes respectively.
• Step 4: Connect the DRED terminal to the right position onto the inverter.

2.6 EARTH FAULT ALARM CONNECTION

GoodWe EH series inverters comply with IEC 62109-2 13.9. A fault indicator LED on the inverter cover will light up, and the system will email the fault information to the customer. The inverter should be installed at eye level for convenient maintenance.

WIRING SYSTEM FOR EH SERIES HYBRID INVERTER

Please select the breaker according to the specification below:

System Diagram Components: PV Strings, DC Breaker (≥40A), To Battery Cable, AC Breaker, To Smart Meter, Smart Meter, CT, Power Meter, Grid, AC Breaker, On-Grid Load, Battery, Back-Up Load.

• Note 1: For batteries with an attached breaker, the external DC breaker is not necessary.
• Note 2: The direction of the CT cannot be connected in reverse; please follow the House (K) → Grid (L) direction for connection.
• Note 3: For Battery-Ready inverters, there is no need to route between the battery and the inverter before activating the battery function.
• Note 4: For Battery-Ready inverters without the Smart Meter, there is no need to route them before purchasing a Smart Meter.

For Spain Grid code, the output max. apparent power of GW6000-EH is 6KVA and will be less than 5kVA exported to the grid, limited by the CT controller and power meter. If the generation facility to be connected to the supply network with more than 5 kVA power in single phase, the connection of the facility to the network shall be three-phase with an imbalance between phases of less than 5kW.

System Connection Diagrams:

Note: For Australia safety country, the neutral cable of the On-Grid side and Back-Up side must be connected together; otherwise, the Back-Up function will not work.

Diagram 1: Example for Australia, South Africa, and New Zealand grid system.

Diagram 2: Example for grid systems without special requirement on electrical wiring connection.

Note: The back-up PE line and rack earth must be grounded properly and effectively. Otherwise, the back-up function may be abnormal when the grid fails.

Note: After the inverter is installed and worked normally when the grid is connected, please turn off the grid power to check whether the back-up function is normal, which can avoid problems in subsequent uses.

03 MANUAL OPERATION

3.1 WIFI CONFIGURATION

This section shows configuration on the web page. Wi-Fi configuration is absolutely necessary for online monitoring and after-sales maintenance.

PREPARATION:

1. Inverter must be powered up with only PV power.
2. Need a router with available internet access to the GoodWe portal (https://www.semsportal.com).

• Step 1:
  • Connect Solar-WiFi* to your PC or smartphone (* means the last 8 characters of the inverter serial No.).
  • Open a browser and log in to 10.10.100.253. Admin (U): admin; Password: admin.
  • Then click "OK".
• Step 2:
  • Click "Start Setup" to choose your router.
  • Then click "Next".
• Step 3:
  • Fill in the password of the router, then click "Next".
  • Click "Complete".

Note: When RSSI of the selected Wi-Fi Network is lower than 10%, the connection may be unstable; please select an available network or shorten the distance between the device and the router. If your wireless router does not pass, please click "Next" and add a wireless network manually.

Note: Please make sure the password, Encryption Method/Algorithm match the router's. If everything is correct, the Wi-Fi LED on the inverter will change from double blink to quartic blink, then to solid status, which means Wi-Fi is connected to the GoodWe iCloud successfully. Wi-Fi configuration can also be done on PV Master; details can be found in the PV Master APP.

3.2 PV MASTER APP OPERATION

PV Master is an external monitoring/configuration application for GoodWe hybrid inverters, used on smartphones or tablets for both Android and iOS systems. Main functions include:

1. Edit system configuration to make the system work as per customer needs.
2. Monitor and check the performance of the hybrid system.
3. Wi-Fi configuration.

Please download PV Master OPERATION INSTRUCTIONS from www.goodwe.com.

3.3 CEI AUTO-TEST FUNCTION

The PV Auto-Test function of CEI is integrated into the PV Master APP for Italy's safety country requirement. For detailed instructions on this function, please refer to the PV Master Operation Instructions.

3.4 BATTERY FUNCTION ACTIVATION

If your inverter is Battery-Ready and you want to activate the battery function, you need to contact the dealer to purchase an activation code and activate the battery function in PV MASTER. In the Advanced Setting, click on "Set", enter the activation code, then go to the Basic Setting to select the work mode, battery model, and test.

04 OTHERS

4.1 DISCLAIMER

The EH series hybrid inverters are transported, used, and operated under specific environmental and electrical conditions. GoodWe reserves the right not to provide after-sales services or assistance under the following conditions:

• Inverter is damaged during transfer.
• Inverter is out of its warranty year, and extended warranty was not purchased.
• Inverter is installed, refitted, or operated in improper ways without authority from GoodWe.
• Inverter is installed or used under improper environment or technical conditions mentioned in this user manual, without authority from GoodWe.
• Installation or configuration of the inverter does not follow requirements mentioned in this user manual.
• The inverter is installed or operated against the requirements or warnings mentioned in this user manual.
• Inverter is broken or damaged by force majeure events like lightning, earthquake, fire hazard, storm, and volcanic eruption, etc.
• Inverter is disassembled, changed, or updated on software or hardware without authority from GoodWe.
• Inverter is installed, used, or operated against any related international or local policies or regulations.
• Any non-compatible batteries, loads, or other devices connected to the EH system.
• Obtaining the Battery-Ready inverter activation code through illegal channels.

Note: GoodWe reserves the right to explain all contents in this user manual. To ensure IP65 rating, the inverter must be sealed well. Please install the inverters within one day after unpacking. Otherwise, seal all unused terminals/holes; do not leave any terminals/holes open, and confirm there is no risk of water & dust ingress.

Maintenance: The inverter requires periodic maintenance, details as below:

• Make sure the inverter is totally isolated from all DC and AC power for at least 5 minutes before maintenance.
• Heat sink: Please use a clean towel to clean the heat sink once a year.
• Torque: Please use a torque wrench to tighten the AC and DC wiring connections once a year, following section 2.4 torque instructions.
• DC breaker: Check the DC breaker regularly; activate the DC breaker 10 times in a row once a year. Operating the DC breaker will clean its contacts and extend its lifespan.
• Water-proof covers: Check if the water-proof covers of RS485 and other ports are fastened once a year.

4.2 ERROR MESSAGE AND TROUBLESHOOTINGS

ERROR MESSAGE: The error message below will be displayed on the PV Master APP or reported by Email if the error really happens.

4.3 TECHNICAL PARAMETERS AND CERTIFICATES

TECHNICAL PARAMETERS OF EH INVERTER

*1: For CEI 0-21.
*2: The grid feed-in power for VDE-AR-N 4105 and NRS097-2-1 is limited to 4600VA; for AS/NZS 4777.2, it is limited to 4950VA & 21.7A.
*3: CAN communication is configured by default. If 485 communication is used, please replace the corresponding communication line.
*4: No Back-up Output.
*5: Not all certifications & standards are listed; check the official website for details.
*6: When there is no battery connected, the inverter starts feeding in only if the string voltage is higher than 200V.

4.4 WARNING QUICK CHECK LIST

• [1] Inverter cannot be installed near flammable, explosive, or strong electro-magnetic equipment, page 06
• [2] Remember that this inverter is heavy! Please be careful when lifting it out of the package, page 07
• [3] The polarity of PV strings or on the inverter cannot be connected reversely; otherwise, the inverter could be damaged, page 08
• [4] Make sure the battery breaker is off and the battery nominal voltage meets EH specification before connecting the battery to the inverter, and ensure the inverter is totally isolated from PV and AC power, page 09
• [5] Make sure the inverter is totally isolated from any DC or AC power before connecting the AC cable, page 11
• [6] Make sure the AC cable is totally isolated from AC power before connecting the Smart Meter & CT, page 13

Appendix: Protection Category Definition

Overvoltage Category Definition:

• Category I: Applies to equipment connected to a circuit where measures have been taken to reduce transient overvoltage to a low level.
• Category II: Applies to equipment not permanently connected to the installation. Examples include appliances, portable tools, and other plug-connected equipment.
• Category III: Applies to fixed equipment downstream of and including the main distribution board. Examples include switchgear and other equipment in an industrial installation.
• Category IV: Applies to equipment permanently connected at the origin of an installation (upstream of the main distribution board). Examples include electricity meters, primary over-current protection equipment, and other equipment connected directly to outdoor open lines.

Moisture Location Category Definition:

Environment Category Definition:

Pollution Degree Definition:

• Pollution Degree I: No pollution or only dry, non-conductive pollution occurs. The pollution has no influence.
• Pollution Degree II: Normally only non-conductive pollution occurs. Occasionally, however, a temporary conductivity caused by condensation must be expected.
• Pollution Degree III: Conductive pollution occurs, or dry, non-conductive pollution occurs, which becomes conductive due to condensation, which is expected.
• Pollution Degree IV: Persistent conductive pollution occurs, for example, the pollution caused by conductive dust, rain, and snow.

4.5 CHECKING THE ELECTRICAL CONNECTION

1. Check if the AC or DC wire is loose.
2. Check if the earth wire is reliably grounded.
3. Check if the waterproof covers of BMS and Meter ports are fastened.
4. Please use a torque wrench to tighten the AC and battery terminal wiring connections once a year, following section 2.4 torque instructions.

Caution: Maintenance cycle is once half a year.