What kind of cloth do photovoltaic factories use to clean glass

Yes, you can use glass cleaners on solar panels but not too much glass cleaner for safety and environmental reasons, and especially if you have a lot of panels, that might take you some time to clean. Most importantly when using glass cleaners is to remove the residue of soap and chemicals with towels, paper, and water.

Superhydrophobic coating laid on glass cover of solar photovoltaic cell (SPVC). Facile, scalable sol–gel method followed to coat a silica-nanocomposite on glass. Liquid droplet on the treated surface shows enhanced dust pick-up and cleansing. Nanocomposite coating itself offers a negligible degradation in SPVC voltage output.

Here's is a simple non-toxic recipe for glass cleaner: 1/4 cup vinegar, 1/2 teaspoon liquid non-abrasive soap or detergent, and 2 cups of water in a spray bottle. In drier areas when there is water rationing – the solar panels can be cleaned fairly well using an air-hose. Use a non-abrasive cleaning sponge or towel to wash the glass.

Unlike a pure alcohol cleaner, soap leaves a residue when cleaning which reduces the light intake – plus, it can act as a magnet and attract dust. When you use detergents to clean your solar panels, what happens is that the abrasive chemicals sometimes streak the glass of the panel or increase the risk of scratching the glass on the solar panel.

Viability of the superhydrophobic nanocomposite coating on glass covers of solar photovoltaic (SPV) cells have been demonstrated through droplet impaction tests, measurement of transmissivity and SPV cell performance before and after cleansing with a limited water budget.

However, photovoltaic panels installed in open environments and exposed to sand and dust are tasked with absorbing a high amount of sunlight, while also being required to withstand sandstorms and acid rain which can cause corrosion of glass.