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User Manual
1. Use a multimeter to measure the output voltage of each optimizer after wiring.
2. Considering the effect of the accuracy of the multimeter on the actual measure-
ment on site, the optimizer can function normally as long as the output voltage
falls in the range of 0.9V - 1.1V.
3. If the output voltage is less than 0.9 V, check the following items:
•
Check whether the sunlight is sufficient.
•
Check whether the input side of the optimizer is connected to the PV module.
•
If the fault is not caused by foregoing reasons and still persists, please replace
the optimizer.
4. If the output voltage is greater than 1.1 V, the optimizer fails. Please replace the
optimizer.
5. If no voltage is detected, replace the optimizer or component.
step 7 When connecting multiple optimizers, connect OUT- of the first optimizer to OUT + of the
second optimizer, and so on. Use a multimeter to measure the optimizer voltage. If typical
value of output voltage is 1V*N (N is the number of optimizers), no fault occurs to the system.
Whether connecting OUT+ of the first optimizer to OUT- of the second optimizer or
connecting OUT- of the first optimizer to OUT+ of the second optimizer is depend-
ent on the polarity of the extension cable that is connected to the inverter on site.
5 Electrical Connection
47
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