storagefaults.comstoragefaults.com

SolarEdge•Optimizer

Analysis by Marcus & Team

SolarEdge Optimizer Output Voltage at 60V in Standby

Troubleshoot SolarEdge optimizer voltage issue. Learn why optimizer output is 60V in standby mode & how to fix it. Residential hybrid inverter diagnostics.

Frequently Asked Questions

•What is the typical output voltage of a SolarEdge optimizer in standby mode?

Approximately 1V.

•What safety precautions should be taken when working with SolarEdge optimizers?

De-energize the system, wear appropriate PPE, and follow NEC Article 690.

•How often should SolarEdge systems be inspected for maintenance?

At least annually for visual inspections, and professionally every 3-5 years.

Related questions

Loading related questions...

Marcus leads the technical research department at Storage Faults. Together with a team of systems analysts, he specializes in translating complex solar storage error codes into actionable diagnostic steps for the US market.

← Back to list

Important Warnings:

Working with PV systems involves high DC voltages. Always de-energize the system by opening the DC disconnect before performing any maintenance or repairs. Wear appropriate personal protective equipment (PPE), including insulated gloves and safety glasses. Only qualified electricians should work on PV systems. Ensure compliance with NEC Article 690 and local electrical codes. Be aware of potential arc flash hazards.

Observed Symptoms:

SolarEdge optimizer reports an output voltage of 60V while the SolarEdge inverter is in standby mode.

Why This Happens:

Optimizer failure: The DC-DC converter within the optimizer may have failed, causing it to output an incorrect voltage.
Communication issue: The optimizer may not be properly communicating with the inverter, leading to incorrect voltage reporting.
Wiring issue: A loose or corroded connection between the optimizer and the inverter could cause voltage fluctuations.
Inverter fault: Although the inverter is in standby, a fault within the inverter's MPPT or communication circuitry may affect the optimizer's behavior.
Ground Fault: A ground fault within the PV array can cause unexpected voltage readings.
Firmware issue: Outdated or corrupted firmware in the optimizer or inverter can cause communication and voltage regulation problems.

Technical Background:

SolarEdge optimizers are DC-DC converters designed to maximize the power output of each PV module. In standby mode, the inverter is not actively converting DC power to AC. However, the optimizers maintain a pre-defined output voltage, typically around 1V, unless the inverter is completely shut down (DC disconnect open) or there is a fault. A higher than expected voltage (e.g., 60V) indicates a potential issue with the optimizer itself or the communication with the inverter.

Step-by-Step Fix:

1

Verify the DC disconnect is open. Ensure the PV array is isolated from the inverter for safety per NEC 690.
2

Use a calibrated multimeter to measure the actual output voltage of the optimizer at its terminals. Compare this reading to the voltage reported by the SolarEdge monitoring portal.
3

Inspect the wiring connections between the optimizer and the inverter for any signs of damage or corrosion. Use a torque wrench to ensure connections are tight, per manufacturer specification.
4

Use a DC clamp meter to measure the current flowing through the string. A high current indicates a potential short circuit. Record and report.
5

Check the firmware versions of both the optimizer and the inverter. Update to the latest versions if necessary, following the manufacturer's instructions.
6

If the measured voltage matches the reported voltage and is significantly higher than 1V during inverter standby, replace the faulty optimizer.
7

Perform an insulation resistance test on the PV string to check for ground faults using a Megger. Follow NEC 690.4(D).