SolarEdge Inverter 3X2 Error Code: AC Voltage Out of Range

Quick Answer

SolarEdge 3X2 means the AC utility grid voltage went outside the acceptable range - typically above 253V or below 211V for a 240V nominal system in North America. The inverter disconnects and waits for voltage to return to normal, then reconnects automatically. If this code appears frequently, it can mean the utility has a persistent voltage issue on your street, or the inverter's voltage thresholds need adjustment by an installer.

SolaredgeInverterSeverity: moderateDifficulty: intermediate68% DIY Success

Time to Fix

10–60 min

Difficulty

intermediate

Parts Cost

—

Tools Needed

SetApp (SolarEdge mobile app), SolarEdge monitoring portal access

What Does the 3X2 Code Mean?

3X2 is a grid voltage protection trip. The inverter disconnects when voltage is out of spec and reconnects automatically when stable. Frequent recurrence signals a utility voltage problem or a threshold configuration issue.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Grid voltage instability from utility40%

Hardware fault in voltage monitoring circuit36%

Inverter voltage threshold misconfigured24%

Symptoms You May Notice

Inverter stops producing power suddenly
LCD shows 3X2 fault code
Monitoring portal shows production drop to 0
Fault clears within minutes and production resumes

Can you reset a Solaredge inverter to clear the 3X2 code?

To reset after a 3X2 fault: the inverter reconnects automatically after 5 minutes if the grid voltage has returned to the acceptable range. For a manual reset, turn off the AC disconnect for 5 minutes and turn it back on.

Tools Required for Diagnosis

SetApp (SolarEdge mobile app)SolarEdge monitoring portal access

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Check the SolarEdge monitoring portal for the 3X2 fault timestamp

Check the SolarEdge monitoring portal for the 3X2 fault timestamp. Note whether the fault coincides with peak production hours when many solar systems in the area are exporting simultaneously.

Wait 5 minutes after the fault appears

Turn off the AC disconnect, wait 5 minutes, and turn it back on

If 3X2 recurs more than twice per week

Ask your solar installer to review the inverter voltage limits

Frequently Asked Questions

What AC voltage range does a SolarEdge inverter require?

For North American 240V single-phase systems, SolarEdge inverters typically accept voltages between 211V and 253V. Values outside this range trigger the 3X2 fault. The exact thresholds are configurable within the limits set by your utility's interconnect agreement.

Why does my SolarEdge show 3X2 only in the afternoon when it is sunny?

This is a known phenomenon in solar-dense neighborhoods. When many solar systems export simultaneously at peak midday production, the combined reverse power flow can push the local utility transformer voltage above 253V. The inverter is required to disconnect at that point. Contact your utility company - this is a grid infrastructure issue, not an inverter defect.

Is a 3X2 fault the same as 2XB?

They are related but distinct. 3X2 is triggered by AC voltage going out of range (too high or too low). 2XB is triggered by AC frequency going out of range. Both cause the inverter to disconnect and both involve automatic reconnection when the grid returns to normal.

Can I report high voltage issues to my utility?

Yes, and you should. Chronic high voltage issues (causing regular 3X2 faults) are an infrastructure problem that the utility is responsible for fixing. Provide the monitoring portal fault timestamps as evidence. Many utilities have a voltage complaint process and will dispatch a lineman to measure voltage at the transformer.

Will 3X2 faults cause any financial impact?

Each 3X2 fault causes a production outage of typically 5 to 15 minutes. One or two per month is negligible. Multiple faults per day during peak hours can meaningfully reduce monthly kWh production. The SolarEdge monitoring portal tracks total downtime and lost production which you can use to quantify the impact.

Related Solaredge Inverter Error Codes

Code: HUBSolarEdge Inverter Error Codes: Complete Fault Guide for SE Series Code: 2XBSolarEdge Inverter 2XB Error Code: Grid Frequency Out of Range Code: RESETSolarEdge Inverter Error Codes: Complete Fault Guide for SE Series

Same Fix on Other Brands

Enphase Grid Voltage Fault:

Models Known to Experience 3X2 Errors

This repair applies to most Solaredge inverters with this error code. Common model numbers include:

SE7600H, SE10000H, SE6000H, SE3000H

Last verified for technical accuracy on March 14, 2026