Prerequisites

• The FusionSolar app is recommended when the inverter is connected to the FusionSolar Smart PV Management System. The SUN2000 app is recommended when the inverter is connected to other management systems.
• FusionSolar app: Go to Huawei AppGallery and search for FusionSolar or scan the QR code to download and install the app.

• SUN2000 app: Go to Huawei AppGallery, search for SUN2000, and download the installation package of the latest version.

• In areas where the FusionSolar app is unavailable (for example, in the UK) or a third-party management system is used, only the SUN2000 app can be used for commissioning. This document uses the FusionSolar app as an example to describe the commissioning method. For the SUN2000 app, perform operations as required.
• The SUN2000 app version must be 3.2.00.005 (Android) or later.

Procedure

1. Run the FusionSolar app and access Device Commissioning. (Perform this step only for the FusionSolar app.)
   Figure 5-15 Device commissioning
   

2. Connect to the inverter

   Tap Scan. On the QR code scanning screen, align the QR code with the scanning box to automatically scan and connect to the WLAN of the inverter.

   • The WLAN name of a product consists of "Device name-Product SN." (The last six digits of the WLAN name of some products are the same as the last six digits of the product SN.)
   • Use the initial password for the first connection. You can obtain the initial WLAN password from the label on the device. (For some products that have been discontinued, the initial password is Changeme.)
   • Ensure account security by changing the password periodically. Your password might be stolen or cracked if it is left unchanged for extended periods. If a password is lost, the device cannot be accessed. In these cases, the Company shall not be liable for any loss.
   • If the login screen is not displayed after you scan the QR code, check whether your phone is correctly connected to the device WLAN. If not, manually select and connect to the WLAN.
   • If the message This WLAN network has no Internet access. Connect anyway? is displayed when you connect to the built-in WLAN, tap CONNECT. Otherwise, you cannot log in to the system. The actual UI and messages may vary with mobile phones.

3. Log in to the device commissioning screen as installer.
   • Set the password as prompted at the first login. (For some products that have been discontinued, the initial password is 00000a.)
   • After completing the deployment settings, the installer should remind the owner to access the local commissioning screen of the device and set the login password of the owner account as prompted.
   • Ensure account security by changing the password periodically. Your password might be stolen or cracked if it is left unchanged for extended periods. If a password is lost, the device cannot be accessed. In these cases, the Company shall not be liable for any loss.

4. Set grid-tied control parameters.
   • To set Grid-tied point control, you need to enter the inverter login password. For details about the inverter login password, see the section about connecting to the inverter.
   Figure 5-16 Parameter settings
   
   Table 5-2 Control mode

   Parameter			Description
   Active power	Unlimited	-	If this parameter is set to Unlimited, the inverter output power is not limited and the inverter can feed its rated power to the power grid.
   	Grid connection with zero power	Closed-loop controller	For a single inverter: When the Smart Dongle is connected, set Closed-loop controller to Inverter. When the inverter is directly connected, set Closed-loop controller to Inverter. For multiple inverters, Closed-loop controller can only be set to Controller.
   		Limitation mode	Total power indicates export limitation of the total power at the grid-connection point. (When a single-phase meter is connected, only the Total power limitation mode can be selected.) Single-phase power indicates export limitation of the power in each phase at the grid-connection point.
   		Power adjustment period	Specifies the shortest interval for a single export limitation adjustment.
   		Power raising threshold	Specifies the dead zone for adjusting the inverter output power. If the power fluctuates within the power control hysteresis, the power is not adjusted. The recommended value is 1% to 2% of the inverter output power.
   		Communication disconnection fail-safe	In the inverter export limitation scenario, if this parameter is set to Enable, the inverter will derate according to the active power derating percentage when the communication between the inverter and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.
   		Communication disconnection detection time	Specifies the time for determining the communication disconnection between the inverter and the Smart Dongle. This parameter is displayed when Communication disconnection fail-safe is set to Enable. You are advised to set Communication disconnection detection time to 3s.
   		Active power output limit for fail-safe	Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any power meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.
   	Grid connection with limited power (kW)	Closed-loop controller	For a single inverter: When the Smart Dongle is connected, set Closed-loop controller to Inverter. When the inverter is directly connected, set Closed-loop controller to Inverter. For multiple inverters, Closed-loop controller can only be set to Controller.
   		Limitation mode	Total power indicates export limitation of the total power at the grid-connection point. (When a single-phase meter is connected, only the Total power limitation mode can be selected.) Single-phase power indicates export limitation of the power in each phase at the grid-connection point.
   		Maximum grid feed-in power (kW)	Specifies the maximum active power transmitted from the grid-connection point to the power grid.
   		Power adjustment period	Specifies the shortest interval for a single export limitation adjustment.
   		Maximum protection time	Specifies the time for detecting power meter data. If the Smart Dongle does not detect any power meter data within the preset time, the Smart Dongle delivers the preset value of the Active power output limit for fail-safe to the inverter for protection. The recommended value is 5s or greater.
   		Power raising threshold	Specifies the dead zone for adjusting the inverter output power. If the power fluctuates within the power control hysteresis, the power is not adjusted. The recommended value is 1% to 2% of the inverter output power.
   		Communication disconnection fail-safe	In the inverter export limitation scenario, if this parameter is set to Enable, the inverter will derate according to the active power derating percentage when the communication between the inverter and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.
   		Communication disconnection detection time	Specifies the time for determining the communication disconnection between the inverter and the Smart Dongle. This parameter is displayed when Communication disconnection fail-safe is set to Enable. You are advised to set Communication disconnection detection time to 3s.
   		Active power output limit for fail-safe	Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any power meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.
   	Grid connection with limited power (%)	Closed-loop controller	For a single inverter: When the Smart Dongle is connected, set Closed-loop controller to Inverter. When the inverter is directly connected, set Closed-loop controller to Inverter. For multiple inverters, Closed-loop controller can only be set to Controller.
   		Limitation mode	Total power indicates export limitation of the total power at the grid-connection point. (When a single-phase meter is connected, only the Total power limitation mode can be selected.) Single-phase power indicates export limitation of the power in each phase at the grid-connection point.
   		PV plant capacity	Specifies the total maximum active power in the inverter cascading scenario.
   		Maximum grid feed-in power (%)	Specifies the percentage of the maximum active power of the grid-connection point to the PV plant capacity.
   		Power adjustment period	Specifies the shortest interval for a single export limitation adjustment.
   		Maximum protection time	Specifies the time for detecting power meter data. If the Smart Dongle does not detect any power meter data within the preset time, the Smart Dongle delivers the preset value of the Active power output limit for fail-safe to the inverter for protection. The recommended value is 5s or greater.
   		Power raising threshold	Specifies the dead zone for adjusting the inverter output power. If the power fluctuates within the power control hysteresis, the power is not adjusted. The recommended value is 1% to 2% of the inverter output power.
   		Communication disconnection fail-safe	In the inverter export limitation scenario, if this parameter is set to Enable, the inverter will derate according to the active power derating percentage when the communication between the inverter and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.
   		Communication disconnection detection time	Specifies the time for determining the communication disconnection between the inverter and the Smart Dongle. This parameter is displayed when Communication disconnection fail-safe is set to Enable. You are advised to set Communication disconnection detection time to 3s.
   		Active power output limit for fail-safe	Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any power meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.
   Shutdown at high feed-in powera	Shutdown at high feed-in power		The default value is Disable. If this parameter is set to Enable, the inverter shuts down for protection when the grid-connection point power exceeds the threshold and remains in this condition for the specified time threshold.
   	Upper feed-in power threshold for inverter shutdown (kW)		The default value is 0. This parameter specifies the power threshold of the grid-connection point for triggering inverter shutdown.
   	High feed-in power duration threshold for triggering inverter shutdown (s)		The default value is 20. This parameter specifies the duration threshold of high feed-in power for triggering inverter shutdown. When High feed-in power duration threshold for triggering inverter shutdown is set to 5, Shutdown at high feed-in power takes precedence. When High feed-in power duration threshold for triggering inverter shutdown is set to 20, Grid connection with limited power takes precedence (when Active power control is set to Grid connection with limited power).
   Note a: This parameter is supported only for the AS4777 grid code.