Installation Guide for HUAWEI models including: SUN2000, 450W-P Smart PV Optimizer
The Smart PV Optimizer is a DC-DC converter installed on the rear of PV modules in a PV system. It manages the maximum power point (MPP) of each PV module ...
Product Overview. The Smart PV Optimizer is a DC-DC converter installed on the rear of PV modules in a PV system. It manages the maximum power point (MPP) of each PV.. View
SUN2000-450W-P Smart PV Optimizer Quick Guide Issue: 04 Part Number: 31500AYH Date: 2020-10-30 1 Product Overview The Smart PV Optimizer is a DC-DC converter installed on the rear of PV modules in a PV system. It manages the maximum power point (MPP) of each PV module to improve the energy yield of the PV system, and performs functions such as module-level shutdown and module-level management. Mounting bracket Type II apparatus Burn Electric (enhanced warning shock insulation) warning 2 Installing the Optimizer Properly plan the installation position of optimizers to ensure that the cables between the optimizer and the PV module and between adjacent optimizers can be properly connected, and the maximum communication distance between the optimizer and the solar inverter is within 350 m. 1. After determining the installation position of the optimizer, remove and attach the SN label. or 2. Install the optimizer based on the selected installation mode. Copyright © Huawei Technologies Co., Ltd. 2020. 1 All rights reserved. Installed on an Extruded Aluminum Profile T-shaped Bolt M8x20 T-shaped bolt The T-shaped bolt and nut need to be purchased separately from Huawei. The bolt dimensions are as follows. Extruded aluminum profile Flange nut Installed on a PV Module Frame Bolt Assembly Before installation, ensure that a mounting hole has been reserved on the PV module frame. The bolt assembly and nut need to be purchased from a third party. Ensure that the length meets the installation requirements of the PV module frame. PV module M8x20 bolt assembly Flange nut Installed on a PV Module Frame Frame Mounting Bracket (Front-mounted) Frame mounting bracket PV module Frame mounting bracket Do not press the optimizer mounting ear against the positioning pole of the frame mounting bracket. Purchase the frame mounting bracket separately from Huawei. Install the PV module after the optimizer is installed. The front of the optimizer should be at least 20 mm away from the rooftop. PV module Rooftop Optimizer 2 Installed on a PV Module Frame Frame MountingBracket (Rear-mounted) Frame mounting bracket PV module Frame mounting PV module bracket Do not press the optimizer mounting ear against the positioning pole of the frame mounting bracket. Purchase the frame mounting bracket separately from Huawei. Install the PV module after the optimizer is installed. Optimizer Rooftop The frame mounting bracket should be at least 20 mm away from the rooftop. 3 Installing the Optimizer Cables 1. Connect the optimizer input power cables. 2. Connect the positive probe of the multimeter to the positive output terminal of the optimizer and the negative probe to the negative output terminal. Check the output voltage and resistance of a single optimizer. PV module connection box · The voltage V1 is 0 V. · The resistance R1 is 1 k (±10%). If the probes are reversely connected, the measured resistance is less than the resistance measured when the probes are correctly connected, which might be less than 0.9 k. Resistance 0.9 k R1 1.1 k R1 < 0.9 k Cause The optimizer is normal. If the probes of the multimeter are correctly connected, the optimizer is faulty. 1.1 k < R1 The sunlight is weak. The optimizer input is not connected. The optimizer output is connected to the PV module output. The optimizer is faulty. Suggestions N/A Replace the optimizer. 1. Measure the resistance when the sunlight is sufficient. 2. Connect the optimizer input power cables. 3. Correct the optimizer cable connection. Connect the optimizer input power cables to the output cables of the PV module. 4. If the resistance is still abnormal, replace the optimizer. 3 The resistance measurement range of the multimeter affects the measured string output resistance. If the resistance measurement range of the multimeter is too large, the measured string output resistance may be greater than N x 1.1 kilohms. Common Exception Scenarios The probes are reversely connected. The measured value R2 is less than the resistance measured when the probes are correctly connected. The sunlight is weak: 1.1 k < R1 The optimizer input is not connected: 1.1 k < R1 The optimizer output is connected to the PV module output: 1.1 k < R1 3. Check that the optimizer input is properly connected, and connect the output power cables to the optimizer. Measure the PV string resistance when the sunlight is sufficient. Full Configuration of Optimizers PV string 4 PV string PV string a. If R is infinite, an open circuit occurs in the PV string or the cables are connected to different PV strings. Rectify the PV string open-circuit fault and correctly group the PV string cables. b. If R4 is less than R3, A is the positive cable of the PV string, and B is the negative cable of the PV string. If R3 is less than R4, B is the positive cable of the PV string, and A is the negative cable of the PV string. Attach correct cable labels. 4. Connect cables between the PV string and the solar inverter. Solar inverter 4 Power-On Commissioning You can add an optimizer on the Quick settings screen and set its physical layout on the Physical layout design of PV modules screen of the solar inverter app. For details, see the corresponding solar inverter quick guide or FusionSolar App Quick Guide. The solar inverter quick guide is delivered with the solar inverter. You can scan the QR code to obtain FusionSolar App Quick Guide. If the system has change requirements, such as adding, deleting, and replacing an optimizer, adjusting the physical position of an optimizer, or adjusting the PV string connected to the solar inverter input, power off the inverter and wait for 5 minutes before performing the change operation to avoid human injuries. After the change is performed, the optimizer search process must be performed again and the physical layout diagram must be updated. Otherwise, the networking is incomplete, optimizer faults cannot be located, or the system fails. 5 5 Troubleshooting 1. Open the FusionSolar app, log in to intl.fusionsolar.huawei.com using the installer account, choose My > Device Commissioning, and connect to the WLAN hotspot of the solar inverter. 2. Select installer and enter the login password. Click Log In. The device commissioning screen is displayed. 3. Choose Device Monitoring, select the PV string and check the optimizer status. Status Green Description The optimizer is running properly. Gray The optimizer is offline. Check that the SN and location information are correct and search for the device again. Red The optimizer is faulty. Optimizer status Fault Alarm Cause Suggestions Input overvoltage Optimizer input overvoltage Check whether the open-circuit voltage of the PV occurred. module connected to the optimizer exceeds 80 V. Overtemperature The optimizer internal protection temperature is too high. 1. Check the ventilation and ambient temperature at the optimizer installation position. If the ventilation is poor or the ambient temperature exceeds the upper threshold, improve the ventilation and heat dissipation. 2. If the ventilation and ambient temperature are normal, contact the installation contractor. Internal hardware fault An internal fault the optimizer. occurred in Contact the installation contractor. 1. output backfeed Optimizer output backfeed occurred. 2. 1. 2. Abnormal output The optimizer output voltage voltage is abnormal. 3. 4. Check whether PV modules are severely blocked when PV strings are connected in parallel. If the fault persists, contact the installation contractor. When the sunlight is normal, perform the optimizer search function again. Check whether the optimizer output extension cable is correct (positive connector at one end and negative connector at the other). Check whether the PV string is correctly connected to the inverter or whether there is a breakpoint in the PV string. If the fault persists, contact the installation contractor. Upgrade failed. The optimizer software upgrade failed. 1. When the sunlight is normal, perform the optimizer upgrade again. 2. If the fault persists, contact the installation contractor. 6 6 Replacing an Optimizer 1. Power off the solar inverter and remove the faulty optimizer. 3. Power on the solar inverter. On the Device Commissioning screen, choose Maintenance > Add/Delete device, and tap Auto search to add the new optimizer. 2. Install a new optimizer and correctly connect its cables. 4. On the Device Commissioning screen, choose Maintenance > Optimizer layout, select the corresponding PV module, and bind the new optimizer. Click Submit. 4 1 2 3 7 FAQ 7.1 Does the Optimizer Support Partial Configuration Scenarios? The optimizer supports partial configuration scenarios. It can communicate with the solar inverter to implement module-level management but does not support module-level shutdown. 8 Precautions The optimizer uses Staubli MC4 DC connectors. Ensure that the DC connectors to be connected are of this model. If the DC connectors to be connected are not of the Staubli MC4 model, the connector compatibility report and third-party lab (TUV, VED, or Bureau Veritas) report from the DC connector manufacturer must be available. Using incompatible DC connectors may result in serious consequences. The resulting device damage is beyond the warranty scope. Full configuration scenario: For a single-phase solar inverter, the number of PV modules connected in series in a PV string cannot exceed 25 and the maximum power of a PV string cannot exceed 5 kW under any condition. For a three-phase solar inverter, the number of PV modules connected in series in a PV string cannot exceed 50 and the maximum power of a PV string cannot exceed 10 kW under any condition. Otherwise, the solar inverter may be damaged and even a fire may occur. Partial configuration scenario: The total open-circuit voltage of the PV modules in a PV string cannot exceed the maximum input voltage of the solar inverter under any condition. 7 The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied. You can download this document by scanning the QR code. Only qualified and trained electrical technicians are allowed to operate the device. Operation personnel should understand the composition and working principles of the grid-tied PV power system and local regulations. Carefully read this document prior to installation to get familiar with product information and safety precautions. Huawei shall not be liable for any consequence caused by violation of the storage, installation, and operation regulations specified in this document and the solar inverter user manual. Use insulated tools when installing the device. For personal safety, wear proper personal protective equipment (PPE). If an optimizer does not connect to any other device, connect the OUT+ and OUT ports of the optimizer respectively to the IN+ and IN ports to protect the terminals from water. It is recommended that the positive and negative cables (PV+/PV) between the optimizer and the solar inverter be placed side by side to avoid cable winding. The input end of the optimizer should be connected to the PV module connection box, and the output end to the adjacent optimizer or a solar inverter. Do not reversely connect the input and output cables. Otherwise, the optimizer may be damaged. The screenshots are for reference only. The actual screens prevail. Local physical layout using the solar inverter is used as an example. For details about the remote physical layout using the management system, see the FusionSolar App Quick Guide. 8 Huawei Technologies Co., Ltd. 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