Cleaning Solar Panels in California,USA
in Business+Finance by 2 3 6

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Yes you can,

Rinse solar panels with clean water to clear away loose dirt. Use soft scrubber and soapy water from the bucket to gently wash the surface of the panels. Rinse solar panels with clean water from the hose a second time. Squeegee panels dry.

Follow the same process changing your position as needed until the panels are clean.
by 1 3 6
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Yes, but only if it is located where you can reach it otherwise don't hurt yourself just to save few bucks. The panel collect dust and debris and it affects its efficiency so a simple wash will also do the trick.  
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