---
title: "Showing \"NC\" (No Communication) on one or more panels in the EMP."
description: Not Communicating
---

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# Showing "NC" (No Communication) on one or more panels in the EMP.

First of all, make sure your PVs are receiving plenty of sunlight. The DPI's require DC voltage to communicate and may show "NC" after dark or while shaded. If your PVs are receiving plenty of light and are still showing "NC" there are a few checks that can be done: 1. Make sure the ECU is connected to power; 2. Make sure the microinverters UID has been entered in the ECU correctly; 3. Wait for your changes to take effect. It can take up to 30 minutes for an updated UID to register and start reporting 4. Make sure the light on the microinverter is green; 5. Make sure the ECU is close enough to your Microinverters to receive the signal. If you have tried all of the above and are still experiencing issues, please contact our customer support team at Support@yottaenergy.com

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