Rain helps remove loose dirt, but it does not fully clean solar panels.

Why rain is not enough

• Stubborn dirt such as bird droppings, resin, and fine dust often remains.

• Flat or slightly pitched panels do not allow water and dirt to drain as effectively.

When extra cleaning is required

• When there is clearly visible contamination

• After prolonged dry periods or sandstorms

• In urban areas with high levels of fine dust

Conclusion

Rain helps, but periodic professional cleaning remains necessary for optimal performance.