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it is a calcium build up
get a liquid cleaner that removes calcium and scrub it on the panels
just a side note here
I used to worry about the problem as it was affecting all of my garden solar lights until I bought a small solar panel from JAYCAR and placed it well up in the air and away from any spraying water
to my dismay it also went white but it still charges the battery enough to run solar lights all night to next morning
I think that the panel works from ultra violet rays that penetrate the white film so making the panel parts work
for roof panels that charge to the utility grid, the loss from dust and bird droppings is less that 1% so these companies that charge big dollars to clean the panels are in fact close to rip off people get more information by googling for sites that have cleaners to assist you
Check the pump to see if there is a blockage stopping the impeller from moving. If you have a volt meter, measure the output of the solar cell in bright daylight to see if it is producing the correct voltage.
I had the same problem. Look somewhere under the solar panels on the wind mill. You will find one or two buttons. This will control the lights. You just need to press them to turn them on. It took me awhile to find this, but they are around the solar charging panels.
take the unit and place it in front of you. place your left hand at the top left hand corner of the solar panel. with the heal of your right hand strike firmly on the bottom right corner of the solar panel. alternatively take a flat head screw driver and locate the divot on either of the short sides of the battery case. below the divot find the edge of the battery case lid and pry the top of using the screwdriver.
For first time use solar light needs to charge in full sunlight for 8-12 hours with the switch in the "ON" position to allow the rechargeable battery to reach maximum capacity.
There is also a protective film on the solar panel that needs to be removed.
After doing that, fully charging the battery with the switch in the "ON" position, then if the light does not turn on, remove the 4 screws from the solar cell assembly, remove the battery, wipe both ends and reinstall battery. Make sure the battery is making secure contact with the terminals. I had a new one and the battery was loose inside, making the light go on and off. I reseated the battery and all is well.
However you should not have to replace the battery or the unit, it should still be under warranty if you just bought it. Westinghouse guarantees this unit for one year.
A description is here
Waranty information is here
I would counsel you to just take the unit back for exchange or refund, as the warranty has an exclusion clause and one of the exclusions is if the unit has been opened. Opening the unit might invalidate the warranty.
Hello Phil, what is the size of your solar panel? This pump draws 17 watts so, your panel must be 17 watts or greater. Remember a solar panel only puts out full power when in direct sunlight and facing the sun directly. You can read 21 volts but your amperage may not be full and this is why your pump is not running, not enough amps. I would recommend a minimum of a 20 watt panel.