Do I have to clean my solar panels?

Sometimes. Cleaning your solar panels is easy, however. In fact, rain does a great job of cleaning your solar panels for you! Otherwise, in times of heavy dust or other regional weather issues, you may have to rinse your solar panels to clear the dust and debris.

To find a solar panel cleaning company in your area, please give us a call and we will connect you directly to an approved solar panel cleaning company.

If you decide to clean your own solar panels, we recommend you spray your panels with a hose from the ground – do not get on your roof. You should not clean your solar panels during the hottest part of the day because the extreme temperature difference between the water and the solar panels may cause the glass to crack.

Some notes about solar panel cleaning and your Sunnova service agreement:

Homeowner Responsibility:

Although Sunnova solar system comes with the Sunnova Protect™ warranty1, it’s important to note that you’ll want to keep the solar panels free of debris and obstructions. Doing so will help keep the system operating at optimum levels.1


Regularly trim any trees around your solar system so they don’t block sunlight from reaching the solar panels. The analysis performed at your home during the pre-installation site visit established a benchmark for any shading created by trees, which you are expected to maintain for the lifetime of your solar service agreement.


Panels will become dirty over time. Typically, rainfall will serve as a consistent and effective method of washing the panels. However, in more arid climates where rainfall is minimal and dust storms are often an issue, it may be necessary to periodically rinse your solar panels. Be sure to avoid harsh chemicals that could damage the panels – a garden hose should be sufficient.


Generally, maintenance issues are mainly related to the system’s wires rather than faulty panels and/or equipment. To prevent problems with your system, check that there’s no accumulation of leaves, debris, snow, or critters, like squirrels or rodents, under the solar panels.2 In doing this a couple of times a year, you can avoid interruptions in energy production, system damage and roof rotting. Prevention plays a key factor in extending the lifetime of your panels during your solar service agreement.

1. Refer to the Limited Warranty in your agreement for complete warranty terms and limitations.
2. Sunnova does not assume responsibility for any injuries to the homeowner that may result from solar system maintenance.