Faq - Huawei SUN2000 Series User Manual

SUN2000 Smart PV Optimizer
User Manual
6.1 How Do I Troubleshoot the Problem that the PV
String Resistance Is Not Equal to the Number of
Optimizers?
Use a multimeter to measure the resistance of the PV string when the irradiance is
adequate. The resistance scale range of the multimeter affects the measurement
precision of the PV string output resistance. Select the minimum resistance scale
range that meets the measurement requirements.
The measured PV string resistance must meet the following requirement: PV string
resistance (R1 + R2)/2 kΩ ≈ N x 1 kΩ. For example, if there are 16 optimizers in a
PV string, the PV string resistance should be about 16 kΩ. If the measured PV
string resistance is abnormal, rectify the fault by referring to this section.
Figure 6-1 Measuring the PV string resistance
Issue 04 (2023-04-21) Copyright © Huawei Digital Power Technologies Co., Ltd.

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