For uni-directional configuration, how many modules does each stage use?

For uni-directional configuration, how many modules does each stage use?

• A. 7
• B. 9
• C. 8
• D. 10

Answer: (B)

In a uni-directional configuration, each stage uses nine modules because the stage is typically built as a 3 by 3 arrangement: three modules in series to set the string voltage, with three such strings connected in parallel to provide the needed current. This ensures the same voltage appears across every module in a string and balanced current sharing across the parallel strings, giving reliable performance and straightforward protection. If you tried to use a different count like seven, eight, or ten, you wouldn’t meet the target voltage or current balance without altering the wiring or module ratings, so nine is the correct, practical count for each stage.

In a uni-directional configuration, each stage uses nine modules because the stage is typically built as a 3 by 3 arrangement: three modules in series to set the string voltage, with three such strings connected in parallel to provide the needed current. This ensures the same voltage appears across every module in a string and balanced current sharing across the parallel strings, giving reliable performance and straightforward protection. If you tried to use a different count like seven, eight, or ten, you wouldn’t meet the target voltage or current balance without altering the wiring or module ratings, so nine is the correct, practical count for each stage.