What you will see

  • Inverter stops on bright afternoons
  • F02, F04 or F05 in SEMS or on the screen

Why it happens

Many homes exporting at once raise street voltage. A long AC cable adds to it.

Diagram

Why it stops on bright afternoons

  1. 01Many homes export at midday
  2. 02Street voltage rises
  3. 03F02, F04 or F05
  4. 04Recovers when the grid is normal

Protection points change only with DISCO consent.

GoodWe inverters using F-code numbering (DNS G4, SDT G3, ES Uniq, ET).

What you can check yourself

  • Note the times
  • Ask neighbours with solar if theirs stop too
  • Check the AC breaker is fully ON

What not to do

  • Do not change protection points without FESCO or LESCO consent

When to call us

  • Measure voltage at meter and inverter
  • Check AC cable and breaker
  • Prepare readings for the DISCO

Midday voltage

High midday voltage is common on busy FESCO and LESCO transformers. We take readings so you can raise it with your DISCO.

Send us

alarm screenshots with times