Sol-Ark Error Code F20 DC Input Overcurrent – Meaning,... | solardiagnostics.org

Technical Background:

The Sol-Ark inverter triggers the F20 fault code when it detects a current flowing into the DC input that exceeds its rated capacity. This could stem from various factors, including overcurrent conditions caused by excessive solar output or component failures within the inverter itself. The inverter continuously monitors the insulation resistance (RISO) and current levels to ensure safe operation. If the measured current exceeds the predefined thresholds, it will initiate a fault to protect both the inverter and the solar array from potential damage.

Symptoms:

Upon encountering the F20 fault code, users may observe the inverter's LED indicators flashing in a specific pattern, often accompanied by alerts on the monitoring app indicating a DC input overcurrent condition. Additionally, there may be a noticeable drop in energy production, particularly during peak sunlight hours.

Possible Causes:

Overcurrent due to excessive solar array output during peak sunlight hours.
Faulty or damaged components within the inverter, such as capacitors or power transistors.
Incorrectly configured system settings leading to inappropriate current limits.
Short circuit in the wiring between the array and the inverter.
Inadequate wire gauge causing voltage drop and increased current draw.
Ground faults or unintended paths to ground causing excessive current flow.

Solution:

1

Disconnect the solar array from the inverter using an MC4 disconnect tool to safely isolate the system.
2

Use a multimeter to measure the string voltage and current output from the solar array to check for excessive values.
3

Inspect all wiring and connections for signs of damage or wear, particularly at junction boxes and terminals.
4

Verify the inverter settings using the monitoring app to ensure they match the specifications for the installed solar array.
5

Check the inverter's internal components for any signs of failure or damage, if accessible and safe to do so.
6

Reconnect the solar array and reset the inverter, monitoring for the F20 fault code to determine if the issue persists.

Safety Warning:

This troubleshooting process involves working with high-voltage components. It is essential to engage a licensed electrician or certified solar installer to perform any repairs or adjustments to ensure compliance with safety standards and the National Electrical Code (NEC).

Prevention:

To prevent future occurrences of the F20 fault, ensure that the solar array is properly sized for the inverter and that all components are rated for the expected electrical loads. Regular maintenance checks should include inspecting wiring integrity and inverter settings, along with keeping a close eye on system performance during peak production hours.

Frequently Asked Questions

•What does the F20 error code indicate?

The F20 error code indicates an overcurrent condition on the DC input side of the inverter. This can occur due to excessive current flow from the solar panels.

•How can I prevent the F20 error from occurring?

To prevent the F20 error, ensure that the solar panel configuration is within the inverter's specifications. Regularly check for damaged wiring or connections that could cause overcurrent.

Sol-Ark Error Code F20 DC Input Overcurrent – Meaning, Causes & Solution

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Frequently Asked Questions

•What does the F20 error code indicate?

•How can I prevent the F20 error from occurring?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention: