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← TechnologyWhich outcome occurs when a photovoltaic charge controller's freewheeling diode circuit fails short?
A)Battery bank undervoltage condition
B)Uncontrolled battery overcharge occurs
C)Excessive panel back-current flows✓
D)Transformer core saturation intensifies
💡 Explanation
Excessive panel back-current flow occurs because a failed-short diode allows reverse current through the photovoltaic array, bypassing blocking functions; therefore, the panel overheats significantly rather than the battery overcharging assuming functional MPPT.
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