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6

Solar inverter

4. Connect cables between the PV string and the solar inverter.

4

Power-On Commissioning

1. The physical layout of the optimizers must be provided so that you can easily locate faulty 

optimizers based on the physical layout diagram.

2. The physical layout of the optimizers must be provided to use the optimizer disconnection 

detection function. After optimizer disconnection detection is performed, the locating result 

can be viewed on the 

Optimizer layout 

page.

3. Choose 

Maintenance > Subdevice management > Auto search 

to add an optimizer. Create 

a physical layout on the 

Physical layout design

screen. 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.

Physical 

layout

PV rooftop

Location

Faulty optimizer

Disconnection icon

Fault icon

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.

c. The resistance of each pair of PV module and optimizer is 

1 kΩ. The total resistance of a PV string is 1 kΩ times the 

number of optimizers. If the total resistance is 10 kΩ, the 

number of optimizers in the PV string is 10.

Note: The total resistance of a PV string is (R3 + R4)/2.

Summary of Contents for 02312LFH-001-1

Page 1: ...HUAWEI DIGITAL POWER TECHNOLOGIES CO LTD SUN2000 600W P 450W P2 Smart PV Optimizer Quick Guide Issue 02 Part Number 31500GLF Date 2022 02 20 ...

Page 2: ...he length of the input power cable delivered with the optimizer is 150 mm Select PV modules with appropriate cable length to ensure that the optimizer can connect to PV modules The length of the input power cable delivered with the optimizer is 1000 mm Select PV modules with appropriate cable length to ensure that the optimizer can connect to PV modules Type II apparatus enhanced insulation Burn w...

Page 3: ...ptimizers may cause fire Do not store flammable or explosive materials in the installation area 1 Do not install the optimizers in a position that might be soaked in water for two hours or longer Water Cable cutter 3 Do not cut the cables delivered with the optimizers Otherwise the warranty will be voided 4 Avoid direct sunlight ...

Page 4: ...to be purchased from a third party Ensure that the length meets the installation requirements of the PV module frame PV module 2 Install the optimizer based on the selected installation mode 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 d...

Page 5: ...s normal N A R1 0 9 kΩ If the probes of the multimeter are correctly connected the optimizer is faulty Replace the optimizer 1 1 kΩ 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 1 Measure the resistance when the sunlight is sufficient 2 Connect the optimizer input power cables 3 Correct the optimizer c...

Page 6: ...e reversely connected The measured value R2 is less than the resistance measured when the probes are correctly connected The sunlight is weak 1 1 kΩ R1 The optimizer input is not connected 1 1 kΩ R1 The optimizer output is connected to the PV module output 1 1 kΩ R1 The measurement precision of the PV string output resistance depends on the resistance setting of the multimeter Select the lowest re...

Page 7: ...ick guide is delivered with the solar inverter You can scan the QR code to obtain FusionSolar App Quick Guide Physical layout PV rooftop Location Faulty optimizer Disconnection icon Fault icon 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 c...

Page 8: ...r Huawei technical support Internal hardware fault An internal fault occurred in the optimizer Contact your dealer or Huawei technical support Output backfeed Optimizer output backfeed occurred 1 Check whether PV modules are severely blocked when PV strings are connected in parallel 2 If the fault persists contact your dealer or Huawei technical support Abnormal output voltage The optimizer output...

Page 9: ... 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 The optimizer is not supported in the pure off grid ESS networking Otherwise the system may fail to start Pa...

Page 10: ...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 si...

Page 11: ...Huawei Digital Power Technologies Co Ltd Huawei Digital Power Antuoshan Headquarters Futian Shenzhen 518043 People s Republic of China solar huawei com ...

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