Learn about DC Undervoltage in Hoymiles microinverters caused by snow accumulation and how to resolve it.
DC Undervoltage can occur due to insufficient sunlight reaching the panels, often caused by snow or debris accumulation. This can lead to reduced energy production.
To prevent snow accumulation, consider installing panels at a steeper angle or using snow guards. Regular maintenance can also help keep panels clear.
The 'DC Undervoltage' fault occurs when the inverter detects that the voltage from the solar array is below the operational threshold necessary for efficient energy conversion. This can be attributed to several factors, including insufficient solar irradiance, which can happen due to environmental conditions such as snow covering the panels. Additionally, the inverter employs various safety mechanisms, such as insulation resistance measurement (RISO) and ground fault detection, to ensure safe operation. If the voltage falls below a certain level, the inverter will automatically shut down to prevent potential damage.
Homeowners may notice a fault code indicating 'DC Undervoltage' on their Hoymiles inverter display or monitoring app. This typically manifests as a drop in energy production, often accompanied by LED patterns on the inverter showing red or blinking lights. Users may also observe that the inverter is not producing any power despite daylight conditions.
For any electrical work or troubleshooting, it is crucial to engage a licensed electrician or certified solar installer to ensure compliance with safety standards and local codes.
To prevent future occurrences of DC undervoltage, ensure regular maintenance of the solar array, including clearing debris and snow. Schedule periodic inspections of all electrical connections and components, and keep the inverter’s firmware updated to the latest version. Additionally, consider installing snow guards or other mitigation strategies in areas prone to heavy snowfall.