enphase M250 Troubleshooting Guide

Troubleshooting an Enphase System
 2014 Enphase Energy Inc. August 2014
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The seven-day time-lapse animation of a non-productive, or under producing PV/microinverter
pair repeats can show production patterns that indicate shading. The following Enlighten
snapshot shows an example of a system with shading impacts. To view a time-lapse animation of
a system:
 In the View tab, click the Energy/Power drop-down menu. Under Power, select Past 7 Days.
 Click the playback icon. Use the controls at the base of the screen to pause, replay and
change the speed of the animation playback..
If the periods of low production are consistent and happen at the same time of day, then shading
is likely the cause.
2. Refer to ”Messages and Alerts” on page 33 for other possible causes of low production.
One unit shows 0W of production but adjacent units are productive
The microinverter is communicating, but not producing. Communication with no production may indicate a
DC-side failure.
Use Enlighten to view AC measurements for analysis. To view the AC measurements:
1. In the View tab, click the module. A status message displays.
2. Click the graph icon.

enphase M250 Specifications

General

Model	M250
Manufacturer	Enphase Energy
Efficiency	96.5%
Output Voltage	240 V
Operating Temperature Range	-40°C to +65°C
Maximum Output Current	1.04 A
CEC Efficiency	96.0%
Start-up Voltage	22 V
Output Frequency	60 Hz
Enclosure Rating	IP67
Weight	1.6 kg