What you will see
- ID003 or ID004 while a generator is running
- Inverter will not connect on generator
- Clears when grid power returns
Why it happens
Small generators speed up and slow down with load, so their frequency moves outside the range an on-grid inverter accepts.
Diagram
Grid or generator
WAPDA grid
GridSteady frequency
→InverterRunning
Generator
GeneratorDrifts with load
→InverterID003 or ID004
What you can check yourself
- Note whether the code only appears on generator
- Check which source the changeover was on
What not to do
- Do not feed generator power to an on-grid inverter without an engineer's design
When to call us
- Measure frequency on grid and generator
- Check changeover wiring
- Advise on a safe generator arrangement; SOFAR HYD-EP hybrids have their own generator options
Generators in Punjab
Many homes and factories in Faisalabad and Lahore still run generators in long outages. We check how yours is wired against the SOFAR inverter.
Send us
Event List photos, generator size and a photo of the changeover