Fronius state code 304 indicates a "DC overvoltage" condition in your Fronius inverter. This error code signifies that the DC voltage level exceeding the permissible limit, potentially damaging the inverter or your solar system.
Here's a breakdown of what this means:
- DC Voltage: This refers to the direct current generated by your solar panels.
- Overvoltage: The DC voltage has risen above the safe operating range for your Fronius inverter.
- Potential Damage: Excessive DC voltage can cause damage to the inverter's components and potentially compromise the entire solar system's performance.
Possible Causes:
- Faulty Solar Panels: A malfunctioning solar panel can produce abnormally high voltage.
- Shadowing: Partially shaded panels can generate higher voltage in the unshaded sections, leading to overvoltage.
- Wiring Issues: Damaged or incorrectly connected wiring can disrupt the flow of electricity and cause voltage spikes.
- Environmental Factors: Extreme weather conditions like high temperatures can also contribute to DC overvoltage.
Troubleshooting Steps:
- Check the Solar Panels: Inspect your solar panels for any signs of damage, cracks, or debris.
- Identify Shadowing: Ensure that your panels are not partially shaded, especially during peak sunlight hours.
- Verify Wiring: Examine the wiring for any loose connections, corrosion, or damage.
- Reset the Inverter: Try resetting your Fronius inverter by turning it off and then back on.
- Consult a Professional: If the problem persists, contact a qualified solar technician for assistance.
Important: Always prioritize safety and consult a professional if you are unsure about any troubleshooting steps.
