DIY Solar Panel Cleaning: A Step-by-Step Guide

For many solar panel owners, the dilemma often lies in choosing between a DIY clean or enlisting professional help. If you're leaning towards the DIY route, here's how to ensure your panels are sparkling clean. Most households already possess the basic tools needed for the job—typically, a hose and some soap are sufficient. This approach is particularly beneficial in areas prone to drought, mimicking the natural cleaning effect of rain.

Determining when your solar panels need cleaning is the first step. This can be achieved through a simple visual inspection for any accumulated debris, dirt, or bird droppings. Alternatively, a monitoring system can provide valuable insights into your solar panels' performance, indicating when maintenance, including cleaning, is necessary.

What Do You Use to Clean Solar Panels?

Before diving into cleaning, consult with your solar provider or installer for any specific cleaning guidelines or precautions. Generally, the safest method involves using a hose, a bucket of soapy water, and a non-abrasive sponge—similar to washing a car. Avoid using high-pressure sprayers, as they can damage the panels. For tougher stains like bird droppings, ensure any cleaning agents used are gentle and free from hard bristles to prevent scratching. Dish soap is often a safe choice, but steer clear of laundry detergents and harsh chemicals that could harm the panels' surface. In most instances, plain water is your best bet.

Always clean your solar panels on a cool, overcast day to avoid burns from the hot panels and to prevent the soapy water from evaporating too quickly, which could leave behind residues that impair panel efficiency.