My cleaning solution is 1/4 gallon white vinegar with a dash of Windex on top in the bucket water. The white vinegar acidity neutralized the alkaline hard water I have. No spots or residue on my panels after 5 years.
Wow nice telescope you have there
Ps I wouldn’t mind cleaning them panels for u lets say half price 2K
Vinegar for hard water makes perfect sense good for showers tiles even hydroponics to good old vinegar.
Alkaline water and aluminium don’t mix I wonder what the pollution in inner city areas would do to the aluminium frames in solar panels over time not good
I had a temp job once where the contractor went around to clean windows on just finished house construction to get the grime and sheetrock and stucco splatter off the windows. Back then dual pane energy efficient windows were all bare aluminum framed and we used nothing but white vinegar and Windex with water cleaning solution. After liberal razor blade scraping. Never had a problem with corrosion on the aluminum.
But all my solar panels are anodized aluminum frames anyway and the white vinegar doesn’t faze them at all. The bare aluminum racking on the ground mount might get affected but as I said I use the flip mop and squeegee most of the water out of the mophead first after dunking in the wash bucket. Primarily to have as little runoff off the mophead as possible to not feed the weeds so very little of the acidic water is ever exposed to the panel frame in the first place.
If you search for Truck or caravan cleaning broom you should find one. They have the hose fitting on the end with a valve to turn the water on/off and an extendable handle.
Nice idea Knobbage