---
title: My customer is complaining that power production reported on the EMP differs from their utility bill. Why the discrepancy?
description: Bill, mismatch, overpay, Not the same, Utility company
---

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# My customer is complaining that power production reported on the EMP differs from their utility bill. Why the discrepancy?

The ECU gateway collects a snapshot of data from each microinverter on the DC side every five minutes and is carefully designed to minimize network traffic and give a most possible accurate production in their operating environment. The utility company utilizes a revenue grade meter which constantly measures power production on the AC side and as such collects data in real-time. The EMP is intended to demonstrate power production, not record revenue grade data. The energy production numbers shown in the EMP are an estimate based on these infrequent intervals and will often be different than those shown in your utility bill for reasons of monitoring frequency, accuracy and what’s being measured (AC vs DC).

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