What you will see
- Reflux fault after adding or replacing panels
- The fault names a string number
- Generation dropped after the change
Why it happens
Strings sharing an input should match. A shorter string has lower voltage, so the others push current back through it.
A string pointing another way or shaded heavily behaves like a shorter one.
Diagram
Mismatched strings push current backwards
Matched strings
Same number of panels, same direction. Current flows forward.
One shorter or shaded string
Lower voltage, so the others push current back into it.
Common after adding or replacing panels.
What you can check yourself
- Note the string number and any recent change to panels
- Check if that string faces a different direction or gets shade
What not to do
- Do not disconnect strings yourself
When to call us
- Count panels per string and confirm the design
- Measure open-circuit voltage safely
- Rearrange strings so each input matches
Adding panels later
Many Punjab homes add panels a year or two after the first install. Our engineers in Faisalabad and Lahore redesign the strings so the new panels match the old ones.
Send us
the fault code, panel layout photos and details of recent changes