What you will see
- 2001 on cold mornings
- After adding or replacing panels
Why it happens
Panel voltage rises as temperature falls, so a string near the limit goes over in winter.
Diagram
Cold mornings raise string voltage
Summer noonSpring morningCold winter morning
Illustration. Fix by fewer panels in series.
What you can check yourself
- Note the cause ID; it tells which inputs
- Note recent panel changes
What not to do
- Do not add panels yourself
When to call us
- Check string design for low temperatures
- Re-string with fewer panels in series
Winter mornings
Clear December mornings in Punjab push string voltage up. We check Huawei strings for winter in Faisalabad and Lahore.
Send us
the alarm, panel model and panels per string