Solar Panel Cleaner 1 Gallon (Makes 512 G) - Super Concentrated Cleaning Solution for Glass, Metal, Wood & Plastic - Remove Oil, Fingerprint & Water Spots - Multipurpose Solar Panel Cleaning

Great solution, and strong concentrate. As described. Cleaned solar panels very well and streak free. Worth it.

Fast shipping. Concentrate. One of per gallon of water. Works well on my solar pannels.

Cleaning is very good, but you must do a clean water rinse on your panels or it will leave a film on the panels.

Bottle arrived with the cap secured with tape. Used the liquid with a spray nozzle though probably not as intended to clean roof-mounted solar panels since I did not want to use a brush at ground-level. The dilution mix was set to the highest concentration. Sprayed the panels with clean water to remove the top residue. Sprayed the dilution mix on the panels and allowed it to sit on the panels for 10 minutes. Re-sprayed as needed to keep the panels wet. Washdown with clean water. Did 3 cleaning cycles. Afterwards, most of the opaque film was removed. The remaining film was expected to be a mix of pollen and dirt since no brush was used. The most apparent change afterwards was the film build-up was much slower. Using a brush is necessary to remove pollen or similar. I also used the cleaner at full strength to remove the haze on the inside of a car windshield. The cleaner did remove the haze much easier with low odor compared to a standard window cleaner. Highly recommend for cleaning panels, so professional cleaning is less frequent, and to clean the inside of car windows/windshield.

Made a cleaning solution per instructions. Used a telescoping pole and 18" window washing attachment purchased at Home Depot. Hosed off surface of solar panels. Dipped window washing cloth into washing solution. Wiped off solar panels, replenishing washing solution as required. Dirt was quickly removed. Rinsed off solar panels immediately after washing. Solar panels were clean and shinny even after drying. After a month the panels are clean and look much cleaner than the solar panels on nearby houses. Cannot document increase solar production after cleaning, maybe 10% but hard to document with kWh increased production due to cleaning Home Depot telescoping pole and window washing soft micro cloth attachment, good value, design, quality. Cleaning solution worked. $100 investment for every thing -hard to document payback period/ROI. Solar panels are definitely cleaner and the dirt is not returning to the surface after a month plus

Product worked fantastic. I wish I would have taken a before picture. My solar panels were covered in caked on dirt. I had not cleaned them in almost 9 months. I used a deionized water filter for water (the no rinse style of car wash filter system) and twice the recommended amount of cleaner because i found that worked best for me. My process was, rinse the panels, wash with an extension pole and microfiber sponge attachment, rinse again, wash again, followed by a final rinse. This is mostly because of how dirty my panels were. I washed half a panel before I dunked the sponge into the cleaning water to get the dirt out of the sponge. I went through 4x 4ish gallons of water with 2oz of product mixed into each one to do 18x 430 watt panels. I did not squeegee the water off the panels after the final rinse, i just let it air dry. Very happy with this product and will buy again.

This product has little effect on hard water deposits on the solar panels of the pathway lights from the sprinkler system. The product description seems to indicate that it would work, perhaps with multiple applications at full strength. Thus far, no luck.

Works great!