GOODWE AC-coupled Battery Storage User Manual

https://www.semsportal.com/home/pvmaster

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http://www.inliteresearch.com

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www.semsportal.com

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Linkedin
https://www.linkedin.com/company/jiangsu-goodwe-power-supply-technology-co- ltd-/

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Company’s official website
http://en.goodwe.com

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JIANGSU GOODWE POWER SUPPLY TECHNOLOGY CO., LTD
No. 90 Zijin Rd., New District, Suzhou, 215011, China
www.goodwe.com
service@goodwe.com

BT SERIES USER MANUAL
AC-COUPLED BATTERY STORAGE RETROFIT
Rev.1.1
2021-01-08

INTRODUCTION

GoodWe BT series bidirectional inverter is designed for both indoor and outdoor use, which could be used with or without existing grid-tied inverter systems to store energy using batteries.
Energy produced from the grid-tied inverters will be used to optimize self- consumption, the excess will be used to charge the battery, any more could be exported to the grid. Loads will be supported in priority by the grid-tied system, then battery power, if more power is needed, energy will be imported from the grid.

Note:
The introduction describes the general behavior of the BT system. The operation mode can be adjusted on PV Master App depending on the system layout. Below are the general operation modes for BT system:

1.1 Operation Modes Introduction

BT system normally has the following operation modes based on your configuration and layout conditions.

Mode Ⅰ
Energy from grid-tied inverters optimize loads, excess will be used to charge the battery, and no longer will be exported to the grid.

Mode Ⅱ
When energy from grid-tied inverters is weak, the battery will discharge to support the load in priority together with the grid.

Mode Ⅲ
When grid power fails, the battery will discharge to support backup Loads.

Mode Ⅳ
Battery could be charged by the grid, and charge time/power could be set flexibly on PV Master APP.

1.2 Safety & Warning

The BT series 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 inverter or user manual during installation, operation, or maintenance, as any improper operation might cause personal or property damage.

Symbols explanation

Caution!
Failure 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 as the arrows always point upwards.
No more than six (6) identical packages are stacked on each other.
Products should not be disposed of as household waste.
Fragile – 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 undercover.
Signals danger due to electric shock and indicates the time to wait (5 minutes) before it is safe to touch the internal parts of the inverter after it has been disconnected from its power source
CE Mark

Safety warning

Any installation and operation on the 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 inserting and pulling the AC and DC terminals when the inverter is running.
Before any wiring connection or electrical operation on the inverter, all DC and AC power must be disconnected from inverter for at least 5 minutes to make sure inverter is totally isolated to avoid electric shock.
The temperature of the inverter surface might exceed 60℃ during operation, so please make sure it has cooled down before touching it and make sure the inverter is out of reach of children.
Do not open the inverter’s cover or change any components without the manufacturer’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 impaired and warranty commitment for the inverter will be invalid.
Appropriate methods must be adopted to protect inverters from static damage. Any damage caused by static is not warranted by the manufacturer.
Battery negative(BAT-) on inverter side is not grounded as default design.
Connecting BAT- to EARTH is strictly forbidden.
The inverter, with built-in RCMU, will exclude the possibility of DC residual current to 6mA, thus in the system, an external RCD (type A) can be used(≥30mA).
In Australia, the inverter internal switching does not maintain neutral integrity, which must be addressed by external connection arrangements like in the Off-Grid System Connection
The diagram on page 17.
In Australia, the output of the backup side in the switch box should be labeled “Main Switch UPS Supply”, the output of the normal load side in the switch box should be labeled “Main Switch Inverter Supply”.

1.3 Product Overview

INSTALLATION INSTRUCTIONS

2.1 Unacceptable Installations
Please avoid the following installations, which will damage the system or the Inverter.

For the general version, backup cannot connect in parallel.
For further advanced application, please contact after-sales.

Inverter does not support off-grid function in the grid-less area.

Inverter battery input cannot be connected to incompatible batteries.

One meter cannot be connected to multiple inverters, and different CTs cannot be connected to the same line cable.

On-Grid or backup side cannot be connected to any AC generator.

The backup side cannot be connected to the grid.

2.2 Packing List
Upon receiving the hybrid inverter, please check if any of the components as shown below are missing or broken.

2.3 Mounting
2.3.1 Select Mounting Location
For inverter’s protection and convenient maintenance, mounting location for inverter should be selected carefully based on the following rules:
Any part of this system shouldn’t block the switch and breaker from disconnecting the inverter from DC and AC power.
Rule 1. The inverter should be installed on a solid surface, where is suitable for the inverter’s dimensions and weight.
Rule 2. The inverter should be installed vertically or lie on a slope of no more than 15°.

Rule 3. Ambient temperature should be lower than 45°C. (High ambient temperature will cause power derating of the inverter.)
Rule 4. The inverter installation should be protected under shelter from direct sunlight or bad weather like snow, rain, lightning, etc.

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 according to the below figure.

2.3.2 Mounting
Inverter cannot be installed near flammable, explosive, or strong electromagnetic equipment.
The inverter is suitable for mounting on concrete or another non-combustible surface only.
Step 1
Please use the mounting bracket as a template to drill 4 holes in the right positions (10mm in diameter, and 80mm in depth)
Use expansion bolts in the accessory box and fix the mounting bracket onto the wall tightly.
Note: The bearing capacity of the wall must be higher than 25kg, otherwise may not be able to keep the inverter from dropping.

Step 2
Carry the inverter by holding the heatsink on both sides and placing the inverter on the mounting bracket.

Step 3
Ground cable shall be connected to the ground plate on-grid side.

Step 4
Inverters could be locked for anti-theft purposes if it is necessary for individual requirements.

2.4 Electrical Wiring Connection
2.4.1 Battery Wiring Connection
Please be careful about any electric shock or chemical hazards.
For a battery without a build-in DC breaker, make sure there is an external DC breaker (≥40A) connected.
Make sure that the battery switch is off and battery nominal voltage meets ET series’ specification before connecting the battery to the inverter. Make sure the inverter is totally isolated from PV and AC power.
Please follow the requirements and steps below strictly. Using improper wire may cause bad contact and high impedance, which is dangerous to the system.
Use the right BAT plugs from the accessory box.
The maximum battery current is 25A, please use the tin-plated cables of which the cross-section ranges from 4 to 6 mm² (AWG 10). Battery cable requirements are as Figure 2.4.1-1.

Grade

| Description|

Value

---|---|---
A| Outside diameter insulation| 5.5-8.0 mm
B| Conductor core section| 4-6 mm2
C| Conductor core length| 15 mm

Battery wiring connection process

Step 1
Prepare BAT cables and BAT plugs

Note

1. Please use BAT plugs and connectors in the accessory box.
2. BAT cable should be standard, 4-6mm 2 BAT cable.

Step 2
Connect BAT cables to BAT connectors

Note

1. BAT cable must be tightly crimped into the connectors
2. There will be a click sound if connectors are inserted correctly into BAT plugs.

Step 3
Screw the cap on and plug it onto the inverter side.
Note: There will be a click sound if connectors are inserted correctly into BAT plugs.

Note: For the compatible lithium batteries (Pylon/BYD) connection, please refer to the battery connection part in BT quick installation instructions.

2.4.2 On-Grid & Back-Up Connection
An external AC breaker is needed for an on-grid connection to isolate from the grid when necessary.
The requirements of an on-grid AC breaker are shown below.

Inverter model

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AC breaker specification

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GW5K-BT| 25A / 400V (e.g. DZ47-60 C25)
GW6K-BT| 25A / 400V (e.g. DZ47-60 C25)
GW8K-BT| 32A / 400V (e.g. DZ47-60 C32)
GW10K-BT| 32A / 400V (e.g. DZ47-60 C32)

Note: The absence of an AC breaker on the backup side will lead to inverter damage if an electrical short circuit happens on the backup side.

1. Use a separated AC breaker for the individual inverter.
   

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

AC cable is required to connect to both the on-grid and backup sides.
Make sure the inverter is totally isolated from any DC or AC power before connecting the AC cable.

Note:

1. Neutral cable shall be blue, line cable shall be black or brown (preferred) and protective earth cable shall be yellow-green.
2. For AC cables, PE cable shall be longer than N&L cables, so in case that the AC cable slips or is taken out, the protecting earth conductor will be the last to take the strain.

Step 1
Prepare the terminals and AC cables according to the right table.

Grade

| Description|

Value

---|---|---
A| Outside diameter| 13-18 mm
B| Separated wire length| 20-25 mm
C| Conductor wire length| 7-9 mm
D| Conductor core section| 4-6 mm2

Step 2
Put AC cable through terminal cover as shown in the figure.
Note: Please use the terminals in the accessory box.

Step 3
Press the 10 connectors on the cable conductor core tightly.

Note: Make sure the cable jacket is not locked within the connector.

Step 4

1. Connect the assembled AC cables into AC terminals with fastening torque about 2.0-2.5N.m.
   Note: Connect back-up terminals before connecting on-grid terminals. Make sure it is not connected to the wrong side.

2. Lock the cover and screw the cap.

Special adjustable setting
The inverter has a field where the user could set functions, such as trip points, trip time, time of reconnection, active and invalid of QU curve, and PU curve. Functions can be adjusted through special software. If interested, please contact with our department of the server.

Declaration for backup function
The backup output of BT hybrid inverters has an overload ability.
For details please refer to the technical parameters of the BT series inverter(4.3 se)
And the inverter has self-protection derating at high ambient temperature.
The below statement lays out general policies governing the energy storage inverters of the series
EH, EM, ES, ET, BH, BT and SBP.

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 the case where the system is not connected to the batteries, the backup function is strongly not advised for use. The manufacturer shall not cover the standard warranty and be liable for any consequences arising from users not following this instruction.
2. Under normal circumstances, the backup 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 on Back-Up mode. As such, we recommend the users be aware of conditions and follow the instructions as below:
   • Do not connect loads if they are dependent on a stable energy supply for a reliable operation
   • Do not connect the loads which may in total exceed the maximum backup capacity
   • Try to avoid those loads which may create very high start-up current surges such as inverter air-conditioner, high-power pump, etc.
   • Due to the condition of the battery itself, battery current might be limited by some factors including but not limited to the temperature, weather, etc.

Accepted loads as below:

• Inductive load: 1.5P non-frequency conversion air-conditioner can be connected to the backup side.
  Two or more non-frequency conversion air-conditioners connected to backup side may cause UPS mode to be unstable.

• Capacitive load: Total power <= 0.6 x nominal power of model. (Any load with high startup current at start-up is not accepted.)

• For complicated applications, please contact after-sales.

Note:
For convenient maintenance, please install a “4Pole3Throw” on the back-up and on-grid sides. Then it is adjustable to support load by back-up or by grid or default settings.

1. Back-up load is supplied from the backup side.
2. Backup load is isolated.
3. Back-up load is supplied from grid side.

Declaration for backup overload protection

The inverter will restart itself if overload protection triggers. The preparation time for restarting will be longer and longer (max one hour) if overload protection repeats. Take the following steps to restart inverter immediately.

• Decrease back-up load power within max limitation
• On PV Master App → Advanced Setting → Click “Reset Back-Up Overload History”.

2.4.3 Smart Meter & CT Connection

Make sure AC cable is totally isolated from AC power before connecting Smart Meter & CT.
The Smart Meter with CT in the product box is compulsory for BT system installation used to detect grid voltage and current direction and magnitude, further to instruct the operation condition of
BT inverter via RS485 communication.

Note:

1. The Smart Meter with CT is well configured, please do not change any setting on Smart Meter.
2. One Smart Meter can only be used for one ET inverter.
3. Three CTs must be used for one Smart Meter and must be connected on the same phase with the Smart Meter power cable.

Smart Meter & CT connection diagram

Note:

1. Please use the Smart Meter with 3 CTs in the product box.
2. CT cable is 3m as default could be extended to a maximum of 5m.
3. Smart Meter communication cable (RJ45) is attached to the inverter (“To Smart Meter” cable), could be extended to a max of 100m, and must use standard RJ45

Detailed pin function of each port on BT
BMS: CAN communication is configured by default. If 485 communication is used, please contact after-sales to replace it with the corresponding communication line.

Position

| Color| BMS Function| Smart Meter Function|

EMS

---|---|---|---|---
1| Orange&white| 485_A2| NC| 485_A
2| Orange| NC| NC| 485_B
3| Green&white| 485_B2| 485_B1| 485_A
4| Blue| CAN_H| NC| NC
5| Blue&white| CAN_L| NC| NC
6| Green| NC| 485_A1| 485_B
7| Brown&white| NC| 485_B1| NC
8| Brown| NC| 485_A1| NC

Smart Meter LED indications

Anti-reverse function connection

If the BT system (connected with grid-tied inverters) requires an anti-reverse function, it is operable but please note:

1. This diagram is only for installation where there is exporting power limit function requirement.
2. For anti-reverse function, it can be set on PV Master App → Advanced Setting → Power Limit.
3. This diagram will only apply if the grid-tied inverter has an anti-reverse function build-in. And the power limit value can be set on a grid-tied inverter.
4. When using the anti-reverse function, it would buy about 150W from the grid.

Connection diagram

[1] This cable is a theoretical connection supporting anti-reverse function, which could be different for different grid-tied inverters.

2.5 DRED / Remote Shutdown Connection
DRED (Demand response enabling device) is used for installations in Australia and New Zealand (also used as remote shutdown function in European countries), in compliance with Australia and
New Zealand safety requirements(Or European countries). The inverter integrates the DRED control logic and provides the DRED interface. DRED is not provided by the manufacturer.
Detailed connection of DRED / Remote shutdown is shown below:

Step 1
Screw this plate off from the inverter.
Note: DRED should be connected through “DRED Port” as the figure shows.

Step 2

1. Plug out the 6-pin terminal and dismantle the resistor on it.
2. Plug the resistor out, leave the 6-pin terminal for the next step.

Note: The 6-pin terminal in the inverter has the same function as DRED. Please leave it in the inverter if no external device is connected.

Step 3-1 For DRED

1. Put DRED cable through the plate.
2. Connect DRED cable on the 6-pin terminal. The function of each connection position is shown below.

NO.

| 1| 2| 3| 4| 5|

6

---|---|---|---|---|---|---

Function

| DRM1/5| DRM2/6| DRM3/7| DRM4/8| REFGEN|

COM / DRMO

Step 3-2 For Remote Shutdown

1. Put the cable through the plate.
2. Wiring from the No. 5 and 6 holes respectively.

Step 4
Connect DRED terminal to the right position onto the inverter.

2.6 Earth Fault Alarm Connection
BT series inverter complies with IEC 62109-2 13.9. Fault indicator LED on the inverter cover will light up and the system will email the fault information to the customer.

Wiring system for BT series hybrid inverter
Note: This diagram indicates the wiring structure of BT series AC coupled inverter, not the electric wiring standard.

Please select Breaker according to the specification below

Inverter

| ①| ②| ③| ④|

⑤

---|---|---|---|---|---
GW5K-BT| 40A/600V DC breaker| 25A/400V AC breaker| Depends on household loads
GW6K-BT| 25A/400V AC breaker
GW8K-BT| 32A/400V AC breaker
GW10K-BT| 32A/400V AC breaker

1. For batteries with attached breakers, the external DC breaker can be omitted.
2. Please use CT A for L1, CT B for L2, and CT C for L3. And follow “House(K)
   →Grid(L)” direction to do the connection. Otherwise, there will be an error reminded by PV Master App.

System connection diagrams

Note: According to Australian safety regulation, the neutral cable of the on-grid side and backup side must be connected together, otherwise the backup function will not work.

This diagram is an example of an application that Neutral connects together with PE in the distribution box.
Such as: Australia, New Zealand, South Africa, etc. (Please follow local wiring regulations!)

This diagram is an example of an application that Neutral separates with PE in the distribution box.
Such as China, Germany, Czech Republic, Italy, etc. (Please follow local wiring regulations!)

MAMUAL OPERATION

3.1 Wi-Fi Configuration
This part shows configuration on the web page.
Wi-Fi configuration is absolutely necessary for online monitoring and maintenance.

Preparation:

1. Inverter must be powered up with battery or grid power.
2. Router with available internet access to the website www.semsportal.com is required.

Step 1

1. Connect Solar-WiFi to your PC or smartphone ( its name the last 8 characters of the inverter’s serial No.).
2. Open browser and login 10.10.100.253 Admin (User): admin; Password: admin.
3. Then click “OK”.

Step 2

1. Click “Start Setup” to choose your router.
2. Then click “Next”.

Step 3

1. Fill in the password of the router, then click “Next”.
2. Click “Complete”.

Note:

1. Please make sure the password, Encryption method/algorithm is the same with the router’s.
2. 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 has connected to the server successfully.
3. Wi-Fi configuration could also be done on PV Master App, details please check on PV Master App.

Wi-Fi reset & reload
Wi-Fi reset means restarting Wi-Fi module. Wi-Fi settings will be reprocessed and saved automatically. Wi-Fi Reload means setting Wi-Fi module back to the default factory setting.

Wi-Fi reset
Short press reset button.
Wi-Fi LED will blink for a few seconds.

Wi-Fi reload
Long press reset button (longer than 3s).
Wi-Fi LED will double blink until Wi-Fi configuration again.

Note:
Wi-Fi Reset & Reload function is only used when:

1. Wi-Fi loses connection to internet or cannot connect to PV Master App successfully.
2. Cannot find “Solar-WiFi signal” or have other Wi-Fi configuration problems.
3. Please do not use this button if Wi-Fi monitoring works well.

3.2 PV Master App

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

1. Edit system configuration to make the system work as customer needs.
2. Monitor and check the performance of the hybrid system.
3. Wi-Fi configuration.
   Please download “PV Master App” from www.goodwe.com or scan the QR code on the back of this user manual.

3.3 CEI Auto-Test Function
PV auto-test function of CEI is integrated with PV Master App for Italy’s safety country requirements.
For detailed instruction of this function please refer to “PV Master Operation Instructions”.

OTHERS

4.1 Error Messages
The error messages below will be displayed on PV Master App or reported by e-mail if the error occurs.

ERROR MESSAGE

| EXPLANATION| REASON|

SOLUTIONS

---|---|---|---

Utility Phase Failure

| The sequence of on-grid wire is wrong| Inverter detects that phase angle of L2 and L3 are reversed| Reverse connection order of L2 and L3 cable.
Utility Loss| Public grid power is not available (Power lost or on-grid connection fails)| Inverter does not detect the connection of grid| 1. Check (use multi-meter) if AC side has voltage. Make sure grid power is available.
2. Make sure AC cables are connected tightly and well.
3. If all is well, please try to turn off AC breaker and turn it on again in 5 mins.
VAC Failure| Grid voltage is not within the permissible range| Inverter detects that AC voltage is beyond the normal range required by the safe country| 1. Make sure safety country of the inverter is set right.
2. Check (use multi-meter) if the AC voltage (Between L & N) is within a normal range (also on AC breaker side)
a. If the AC voltage is high, then make sure the AC cable complies with that required on the user manual and the AC cable is not too long.
3.b. If the voltage is low, make sure the AC cable is connected well and the jacket of the AC cable is not compressed into the AC terminal.
Make sure the grid voltage of your area is stable and within normal range.
FAC Failure| Grid frequency is not within the permissible range| Inverter detects that the grid frequency is beyond the normal range required by the safe country| 1. Make sure the safe country of the inverter is set right.
2. If safety country is right, then please check on the inverter display if AC frequency (Fac) is within a normal range.
3. If FAC failure only appears a few times and is resolved soon, it should be caused by occasional grid frequency instability.
BAT Over Voltage| BAT voltage is too high| The battery voltage is higher than the max BAT input voltage of the inverter.| Check battery voltage is lower than the Max Battery Input Voltage of the inverter. If the voltage of the Battery is high, please reduce the battery module.
Over Temperature| The temperature inside of the inverter is too high| The inverter’s working environment leads to a high-temperature condition| 1. Try to decrease the surrounding temperature.
2. Make sure the installation complies with the instruction on the inverter user manual.
3. Try to close the inverter for 15 mins, then start up again.
Isolation Failure| Ground insulation impedance of Battery is too low| Isolation failure could be caused by multiple reasons like battery not being grounded well, DC cable is broken, the battery is aged or surrounding humidity is comparatively heavy, etc.| 1. Use a multi-meter to check if the resistance between the earth & the inverter frame is about zero. If it’s not, please ensure that the connection is well.
2. If the humidity is too high, isolation failure may occur.
3. Check the resistance between BAT to earth, if the resistance is lower than 33.3k, check the system wiring connection.
4. Try to restart the inverter, check if the fault still occurs, if not, means it is just an occasional situation or contact after-sales.
Ground Failure| Ground leakage current is too high| Ground failure could be caused by multiple reasons like that the neutral cable on the AC side is not connected well or the surrounding humidity is comparatively heavy, etc.| Check (use multi-meter) if there is voltage (normally should be close to 0V) between earth & inverter frame. If there is a voltage, it means the neutral & ground cables are not connected well on the AC side. If it happens only in the early morning/dawn /rainy days with higher air humidity and is recovered soon, it should be normal.
Relay Check Failure| Self-checking of relay failure| Neutral & ground cables are not connected well on AC side or just an occasional failure| Check (use multi-meter) if there is a high voltage (normally should be lower than 10V) between N & PE cable on the AC side. If the voltage is higher than 10V, it means the neutral & ground cable is not connected well on the AC side or restart the inverter.
DC Injection High| /| Inverter detects a higher DC component in AC output| Try to restart the inverter, check if it still occurs. If not, it is just an occasional situation. Otherwise, contact after-sales immediately.
EEPROM R/W Failure| /| Caused by a strong external magnetic field etc.| Try to restart the inverter, check if it still occurs. If not, it is just an occasional situation. Otherwise, contact after-sales immediately.
SPI Failure| Internal communication fails| Caused by a strong external magnetic field etc.| Try to restart the inverter, check if it still occurs. If not, it is just an occasional situation. Otherwise, contact after-sales immediately.
DC Bus High| BUS voltage is too high| /| Try to restart the inverter, check if it still occurs. If not, it is just an occasional situation. Otherwise, contact after-sales immediately.
Back-Up Over Load| The back-up site is overloaded| Total back-up load power is higher than the backup nominal output power|

Decrease back-up loads to make sure the total load power is lower than back-up nominal output power (please refer to page 12).

Troubleshooting

Checking Before Turning On AC Power

• Battery connection: Confirm the connection between BT and battery : polarities (+/-) are not reversed, refer to Figure 4.2-1
• On-grid & back-up connection: Confirm on-grid connected to the power grid and back-up connected to loads: polarities (L1/L2/L3/N are in sequence) are not reversed, refer to Figure 4.2-2.
• Smart Meter & CT connection: Make sure Smart Meter & CT are connected between house loads and grid, and follow the Smart Meter direction sign on CT, refer to Figure 4.2-3.

Checking as Start BT up and Turn On AC Power
Battery settings, BMS communication, and safety country:
After connecting Solar-WiFi (The Wi-Fi signal is named the last 8 characters of the inverter’s serial No.), check on PV Master App “Param” to make sure battery type is the same as what you have installed, and “Safety Country” Setting is right. Please set it right in “Set” if the setting is not right.

Note: For compatible lithium batteries, BMS status will display “Normal” after selecting the right battery company.

Problems During Operation

BT does not start up with only battery Solution:
Make sure the voltage of battery is higher than 180V, otherwise the battery cannot start BT up.

High power fluctuation on battery charge or discharge:
Solution:
Check if there is a fluctuation on load power.

Battery does not charge:
Solution:

1. Make sure BMS communication is OK on PV Master.
2. Make sure the CT is connected in the right position and in to the right direction as on the user manual page 12
3. Make sure the total load power is much higher than PV power.

Questions & Answers (Q & A)
About Wi-Fi Configuration
Q: Why can’t I find the Solar-WiFi signal on mobile devices?
A: Normally Solar-WiFi signal could be searched right after the inverter has powered up. But Solar-WiFi signal will disappear when BT connects to the internet. If changes to the setting are required, connect to the router to change. If you cant find the WiFi signal or connect to the router,  then please try to reload Wi-Fi (please refer to BT user manual page 17).

*Q: Why can’t I connect Solar-WiFi signal on my phone?**
A: The Wifi module can only connect to one device at a time. If the signal is already connected to another device at the time for some reason, you cannot connect to the signal.

About Battery Operation
Q: Why does the battery not discharge when the grid is not available, while it discharges normally when the grid is available?
A: On the App, off-grid output and backup function should be turned on to make battery discharge under off-grid mode.
Q: Why is there no output on the backup side?
A: For backup supply, the “Back-Up Supply” on PV Master App must be turned on. Under the off-grid mode or grid power is disconnected, the “Off-Grid Output Switch” function must be turned on as well.
Note: As turn “off-grid output switch” on, don’t restart inverter or battery, otherwise the function will switch off automatically.
Q: Why does the battery SOC suddenly jump to 95% on the Portal?
A: This normally happens when BMS communication fails on lithium. If the battery enters the float charge, SOC will be reset to 95% automatically.
Q: The battery cannot be fully charged to 100%.
A: Battery will stop charge when the battery voltage reaches charge voltage set on PV Master App.

Q: Why battery switch always trip when it starts up (Lithium battery)?
A: The switch of lithium battery normally trips for following reasons:

1. BMS communication fails.
2. Battery SOC is too low, battery trips to protect itself.
3. An electrical short-cut happened on battery connection side. Or other reasons please contact with our department of server for details.

Q: Which battery should I use for BT?
A: For BT series inverter, it could connect lithium batteries which have compatibility with BT series inverter with nominal voltage from 180V to 600V. For compatible lithium batteries please refer toba the lottery list in PV Master App.

About PV Master Operation and Monitoring

Q: Why can’t I save settings on PV Master App
A: This could be caused by losing connection to Solar-WiFi *:

1. Make sure you connected Solar-WiFi (make sure no other devices connected) or router (if connected Solar-WiFi to router) and on App home page shows connection well.
2. Make sure you restart the inverter 10mins after you change some settings because the inverter will save settings every 10 mins under normal mode. We recommend you change setting parameters when the inverter is in wait mode.

Q: On the App, why are the data displayed on the homepage different from the Param page, like charge/discharge, PV value, load value, or grid value?
A: The data refresh frequency is different, so there will be data in conformity between different pages on App as well as between that on portal and App.

Q: On App, some columns show NA, like battery SOH, etc. Why does that happen?

A: NA means App does not receive data from inverter or server because of communication problems, such as battery communication, and communication between the inverter and the App.

About Smart Meter and Power Limit Function

Q: How to activate the Output Power Limit function?
A: For BT system, the function could be realized by:

1. Make sure Smart Meter connection and communication are well.
2. Turn on the Export Power Limit function and set the max output power to grid on App.

Note: Even if output power limit is set to 0W, there might still be a deviation of a max of 100W exporting to the grid.

Q: Why is there still power exporting to the grid after I set power limit as 0W?
A: The export limit could theoretically be 0W, but there will be a deviation of around 50-100W for BT system.

Q: Can I use another brand Meter to take over Smart Meter in BT system or change some settings on Smart Meter?
A: No, because the communication protocol is inset between inverter and Smart Meter, another brand Meter cannot communicate. Also, any manual setting change could cause Meter communication failure.

Q: What is the maximum current allowed going through CT on Smart Meter?
A: The max current for CT is 120A.

Other Questions

Q: Is there a quick way to make the system work?
A: The shortest way, please refer to “BT Quick Installation Instructions” and “PV Master App Instruction”.

Q: What kind of load can i connect on the backup side?
A: Please refer to the user manual on page 12.

Q: Will the warranty of the inverter still be valid if for some special conditions we cannot 100% follow the installation or operation instructions of the user manual?
A: Normally we can still provide technical support to problems caused b disobeying the instruction on the user manual, but we cannot guarantee a replacement or returns.  So
if there is any special conditions where you can not 100% follow the instructions, please contact after-sales.

4.3 Disclaimer
The BT series inverters are transported, used, and operated under environmental and electrical conditions. The manufacturer has the right not to provide after-sales services or assistance under the following conditions:

• Inverter is damaged during the transfer.
• Inverter’s warranty has expired and extended warranty is not bought.
• Inverter is installed, refitted, or operated in improper ways without authorization from the manufacturer.
• Inverter is installed or used under improper environment or technical condition mentioned in this user manual, without authorization from the manufacturer.
• Installation or configuration of the inverter does not follow the requirements mentioned in his user manual.
• The inverter is installed or operated against the requirements or warnings that are mentioned it is the user manual.
• Inverter is broken or damaged by any force majeure like a lightning, earthquake, fire hazard, storm, and volcanic eruption, etc.
• Inverter is disassembled, changed, or updated on software or hardware without authorization from the manufacturer.
• Inverter is installed, used, or operated against any related items in international or local policies or regulations.
• Any non-compatible batteries, loads of other devices connected to BT system.

Note: The manufacturer will keep the right to explain all the contents in this user manual. To ensure IP66, the inverter must be sealed well, please install the inverters within one day after unpacking, otherwise please seal all unused terminals/holes, unused terminals/holes are not allowed to be kept open, confirm that there is no risk of water or dust entering the terminals/holes.

Maintenance
The inverter requires periodical maintenance, details as shown below:

• Make sure the inverter is totally isolated from all DC and AC power for at least 5 mins before maintenance.
• Heatsink: Please use a clean towel to clean up the heat sink once a year.
• Torque: Please use a torque wrench to tighten AC and DC wiring connection once a year.
• DC breaker: Check DC breaker regularly, active the DC breaker 10 times in a  row once a year.
• Operating DC breaker will clean contacts and extend the lifespan of DC breaker.
• Water-proof covers: Check if water-proof covers of RS485 and other parts are replaced once a year.

 Technical Parameters

Battery Input Data
Battery Type| Li-Ion
Battery Voltage Range (V)| 180~600
Max. Charging Current (A)| 25
Max. Discharging Current (A)| 25
Charging Strategy For Li-Ion Battery| Self-Adaption To BMS
AC Output Data (On-Grid)
Nominal Apparent Power Output to Utility Grid (VA)| 5000| 6000| 8000| 10000
Max. Apparent Power Output to Utility Grid (VA) [1]| 5500| 6600| 8800| 11000
Max. Apparent Power from Utility Grid (VA)| 10000| 12000| 15000| 15000
Nominal Output Voltage (V)| 400/380, 3L/N/PE
Nominal Output Frequency (Hz)| 50/60
Max. AC Current Output to Utility Grid (A)| 8.5| 10.5| 13.5| 16.5
Max. AC Current From Utility Grid (A)| 15.2| 18.2| 22.7| 22.7
Output Power Factor| ~1 (Adjustable from 0.8 leading to 0.8 lagging)
Output THDi (@Nominal Output)| <3%
AC Output Data (Back-Up)
Max. Output Apparent Power (VA)| 5000| 6000| 8000| 10000
Peak Output Apparent Power (VA) [2]| 10000, 60sec| 12000, 60sec| 15000, 60sec| 15000, 60sec
Max. Output Current (A)| 8.5| 10.5| 13.5| 16.5
Nominal Output Voltage (V)| 400/380
Nominal Output Frequency (Hz)| 50/60
Output THDv (@Linear Load)| <3%
Efficiency
Max. Battery To Load Efficiency| 97.6%
Max. Charge Efficiency| 97.6%
Protection
Anti-Islanding Protection| Integrated
Insulation Resistor Detection| Integrated
Residual Current Monitoring Unit| Integrated
Output Over Current Protection| Integrated
Output Short Protection| Integrated
Battery Input Reverse Polarity Protection| Integrated
Output Over-Voltage Protection| Integrated
Technical Data| GW5K-BT| GW6K-BT| GW8K-BT| GW10K-BT
---|---|---|---|---
General Data
Operating Temperature Range (℃)| -35~60
Relative Humidity| 0~95%
Operating Altitude (m）| ≤4000
Cooling| Nature Convection
Noise (dB)| <30
User Interface| LED & APP
Communication With BMS| RS485; CAN
Communication With Meter| RS485
Communication With EMS| RS485 (Insulated)
Communication With Portal| Wi-Fi;LAN
Weight (kg)| 21
Size (WidthHeightDepth mm）| 516415180
Mounting| Wall Bracket
Protection Degree| IP66
Standby Self Consumption (W) [3]| <15
Topology| Transformerless
Certifications & Standards
Grid Regulation| CEI 0-21; VDE-AR-N 4105; G98, G99, G100; EN 50549
Safety Regulation| IEC/EN 62477
EMC| EN61000-6-1, EN61000-6-2, EN61000-6-3, EN61000-6-4,
EN61000-4-16, EN61000-4-18, EN61000-4-29
[1] According to the local grid regulation
[2] Can be reached only if battery capacity is enough, otherwise will shut down.
[3] No back-up output

4.5 Other Test
For Australian requirements, in the THDi test, Zref should be added between inverter and mains.
RA, XA for Line conduvtor
RN, XN for Neutral conductor
Zref:
RA=0, 24; XA=j0,15 at 50Hz;
RN=0, 16; XN=j0,10 at 50Hz

4.6 Quick Check List To Avoid Danger

1. Inverter cannot be installed near flammable, explosive, or strong electro-magnetic equipment, please refer to page 06
2. Remember that this inverter is heavy! Please be careful when lifting out from the package, please refer to page 07
3. Make sure battery breaker is off and battery nominal voltage meets BT specification before connecting a battery to the inverter and make sure inverter is totally isolated from AC power, please refer to page 10
4. Make sure inverter is totally isolated from any DC or AC power before connecting AC cable, please refer to page 11
5. Make sure AC cable is totally isolated from AC power before connecting Smart Meter & CT, please refer to page 14

Appendix protection category defintion

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 are appliances, portable tools, and other plug- connected equipment.
Category III| Applies to a fixed equipment downstream, including the main distribution board. Examples are 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 are electricity meters, primary overcurrent protection equipment, and other equipment connected directly to outdoor open lines.

Moisture location category definition

Environment category definition

Environment Condition| Ambient Temperature| Relative Humidity| Applied to
---|---|---|---
Outdoor| -20~50℃| 4%~100%| PD3
Indoor Unconditioned| -20~50℃| 5%~95%| PD3
Indoor conditioned| 0~40℃| 5%~85%| PD2

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 is 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 or snow.

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