Definition
Reverse current is current flowing backward (anti-parallel) through a PV module, typically occurring when a shorted module in parallel string draws current from other strings. Module's bypass diodes and series fuse mitigate damage.
Key Takeaways
- Reverse current = backward flow through PV module.
- Caused by shorted module in parallel topology.
- Series fuse limits magnitude per NEC 690.9.
- Bypass diodes help dissipate.
- Module datasheet’s max reverse current is design constraint.
Frequently Asked Questions
1 commonly searched questions about Reverse Current.
When does reverse current happen?
Module short-circuit in parallel string topology. Healthy parallel strings push current through faulted module backward, exceeding its rating.
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