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Module: Solar Panel Cleaning 

1. When using a pole to clean solar panels you should...

A. assume it doesn't conduct electricity. 

B. assume all poles conduct electricity. 

C. know you can't be electrocuted from direct currents. 

D. only clean when it's raining to avoid hot spots.  

2. Stepping on solar panels...

A. should only be done if you're under 150 pounds.  

B. can only be done if they're dry.

C. is safe if they're poly carbon plexiglass. 

D. is never safe to do. 

3. When cleaning solar panels you should consider...

A. electrical hazards through broken panels, cut/exposed wires, missing equipment etc. 

B. fall hazards and type of roof you're working on. 

C. a safe ladder setup if needed.

D. all of the above. 

4. If a fire is started from the panels you should...

A. get yourself and others to safety. 

B. advise first responders of the breaker box. 

C. be aware that the smoke could be highly toxic.

D. all of the above. 

5. The angle of your brush...

A. can't be adjusted.  

B. should be adjusted to keep brush flat on panels. 

C. can be adjusted but can be risky. 

D. doesn't matter.  

6. If you walk away from your pole...

A. leave it extended in a safe place.  

B. leave it descended in a walkway. 

C. leave it descended in a safe place.

D. it doesn't matter where you leave it. 

7. Before getting started...

A. locate the breaker box. 

B. look for any damage or safety concerns. 

C. consider any tripping or slipping hazards you could create. 

D. all of the above. 

8. Water spots could mean...

A. your filters could be going out or old hard water etching.    

B. you're not rinsing properly or you have the wrong rinse type.

C. the glass needs to be squeegeed off. 

D. there's too much soap in your filters. 


9. The layers of a solar panel include...

A. hydrophobic glass and solar cells.

B. tempered frames and solar encapsulates. 

C. control box and solar module. 

D. frame, glass, cells, encapsulates, and back sheet. 

10. You can fix scrub swirl marks by... 

A. rescrubbing the glass more thoroughly with a consistent pattern.    

B. putting extra pressure on the glass with your brush. 

C. being more aggressive with your scrub. 

D.  telling the boss it doesn't look good. 

11. Solar arrays are...

A. the same thing as solar cells.     

B. the only panels with tempered glass. 

C. solar module formations organized into sections. 

D. either polycrystalline or mono crystalline. 

12. Even though it's under the glass and doesn't affect cleaning, solar cells are usually either...

A. black, dark blue, white, or neon.   

B. arrays, panels, cells or thin-film. 

C. thin-film, polycrystalline, or mono crystalline. 

D. dual crystalline, wide-film, or encapsulates. 

13. To avoid fatigue while using a water fed pole you should... 

A. not worry because it's way easier than ladder work.   

B. use your upper body the whole time. 

C. use one arm at a time. 

D. rock back and forth with your body.  

14. When layers of a panel start to separate this is known as...

A. encapsulation. 

B. delaminating. 

C. spider separation. 

D. warm layer limitation. 

15. Using inferred for thermal inspections...

A. is incredibly dangerous because of the heat produced.  

B. is only required on thin-film due to micro cracks. 

C. can cause the panel to delaminate quicker. 

D. can identify heat anomalies early on to pinpoint potential cell damage. 

16. Hot spots are... 

A. from broken encapsulates from panel separation.       

B. connected to issues involving the junction box or wiring harness. 

C. from cells overheating usually by trapped current due to cell damage. 

D. only present on mono crystalline modules. 

17. If you're dealing with heavy debris like bird poop, paint overspray, eggs, etc....

A. a synthetic scrub pad would help break it down. 

B. pencil jets will blast it away. 

C. extra water pressure will help. 

D. a rinser brush 2.0 with a blaster on it is the best solution. 

18. When adjusting your pole to clean an array...

A. you should consider the angel of the panels. 

B. make sure the brush or pad is flat against the panel. 

C. use unextended sections to weigh down the brush.

D. all of the above. 

19. Rinsing is the last step in the cleaning process, you can mess this up if...

A. the glass is problematic. 

B. you use a plastic coated hose in the process. 

C. you don't scrub cell modules. 

D. deionized water isn't the last thing to touch the module.  


20. If a panel gets wet...

A. it is considered clean if the water is pure. 

B. it will look clean but won't be after it dries.     

C. it could cause module damage. 

D. it would be considered a cold spot. 

21. Scrubbing patterns...

A. are only important if the panel is broken.   

B.  aren't necessary on each panel.

C. important to make sure the entire module was scrubbed. 

D. can affect the number of hot spots.

22. If you get scrub marks or brush marks on the panel...

A. you need to re rinse it and it should be fine. 

B. it's because the water is too hard.     

C. you probably didn't follow a pattern and need to re scrub and re rinse.  

D. you can assume it's normal because the panel is hydrophobic. 

23. Cleaning broken panels...

A. is safe because the water is deionized which won't conduct electricity. 

B. isn't safe unless it's raining to disperse the direct current (DC). 

C. is safe if the pole is insulated. 

D. is not safe and unnecessary. 

24. If you have hard water on panels after cleaning...

A. your filtration could need replacement or the homeowner could be hosing the panels. 

B. that's normal and should be ignored. 

C. you need to replace your brush to something synthetic. 

D. this could be from residual hot spots or micro cracks. 

25. For efficiency you should extend and descend your pole...

A. for each setup for best quality of work.   

B. as minimal as possible or within reason for job flow.  

C. often to ensure proper pole function and water flow. 

D.  only when your ladder is broken. 

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