It is required to perform regular inspection and maintenance of the modules, especially during the warranty period. Please contact Renogy in 2 weeks if any abnormality or damage is found.

Solar Panel Cleaning

The accumulation of foreign substances (such as dust and bird droppings) on the glass surface of solar panels can affect their power output and even cause hotspots in the area. The extent of the impact depends on the transparency of the foreign material. For example, a small amount of dust on the glass surface can affect the intensity and uniformity of absorbed sunlight; this usually does not cause damage to the solar panel, and the power output usually does not decrease significantly. However, a large amount of dust accumulation, bird droppings, and shading by plants can form obstructions, which can significantly reduce power output and even form hotspots. It is recommended that the surface of the panels should not be obstructed by anything when there is sunlight.

The cleaning frequency depends on the how much foreign matter and debris accumulates. In many instances the front substrate gets cleaned with the rain, and you can decrease the cleaning frequency. It is recommended to wipe the glass surface with wet sponge or soft cloth. Please DO NOT clean the glass with cleaning agent which contains acid or alkali.

To avoid potential electrical shock or burn, please clean the solar panels in the early morning or at dusk. DO NOT clean the solar panels with damage to the glass surface, backboard or wires.

Solar Panels Inspection

Inspect the solar panels visually to find if there are appearance defect, especially:

• If the glass is broken.
• Corrosion along the cells’ busbar. The corrosion is caused by moisture that has infiltrated into the modules when the surface encapsulation material damaged during the installation or transportation.
• If there is evidence of burning on the panel.

You also need to do the following:

• Check the encapsulation of the connector with the cable.
• Ensure the solar panels are untouched with sharp objects.
• Ensure the solar panels are not shaded.
• Check the connection between the solar panels and the mounts and brackets.

Connector and Cable Inspection

It’s recommended to implement the following preventive maintenance every 6 months:

• Check the connections between the solar panels and other off-grid components.
• Check the sealing gel of the junction box to ensure if it has no crack or crevice.

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