System appeared offline in the monitoring app, raising concern that solar production had stopped.

Equipment

• Microinverters: APsystems DS3-L
• Monitoring Unit: ECU-R
• Communication: Wi-Fi

Reported Issue

System appeared offline in the monitoring app, raising concern that solar production had stopped.

What This Usually Means

When Wi-Fi is interrupted:

• ECU-R loses connection to the router
• Monitoring stops reporting data
• Solar production continues normally

This is a communication issue, not a generation failure.

Solution: ECU-R System Reset

Step-by-Step Reset Procedure

1. Disconnect power to:
   • ECU-R
   • Internet router
2. Wait 30 seconds
3. Restore power to both devices
4. Use a pin or paperclip to press the reset button on the ECU-R for 15 seconds

Allow up to 2 hours for full reconnection.

If Reset Does Not Work

Contact APsystems Support at 844-279-8600 and request:

• System resynchronization
  (This resends communication commands from the ECU-R to the DS3-L microinverters.)

If resync fails, a service visit may be required.

Final Result

• Monitoring data restored
• No impact on solar production
• No hardware replacement

Key Takeaway
An offline APsystems dashboard almost always points to a communication issue. Reset and resynchronization resolve the vast majority of cases.