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Across 4. way of joining devices that increases voltage but not the current 6. measure of electrical resistance 8. electromagnetic radiation in the wavelength range of 4 to 400 nanometers 12. Albert ________He published paper on photoelectric effect, winning the Nobel prize in 1921 13. sun's location east and west of true south 14. demand on an energy producing system 17. region of electrical contact between two different materials 18. pertaining to the direct conversion of light into electricity 21. way of joining devices that increases current but not the voltage 22. forcing current into fully charged battery 23. device that converts ac to dc 24. period during which a system is capable of operation above specified performance level 25. National Electrical Manufacturers Association 27. 1000 kilowatts 28. sun's height above the horizon 29. National Electric Code

Down 1. photovoltaic ____. the smallest semiconductor element within a PV module 2. a small groove scribed into the surface of a solar cell filled with metal for contacts 3. particle of light that acts as an individual unit of energy 5. Charles ______ Developed the first selenium-based solar electric cell 7. property of a conductor, which opposes flow of an electrical current 9. standard unit of electrical power equal to 1000 watts 10. number of photovoltaic modules interconnected electrically to produce voltage required by the load 11. an instrument used for measuring global solar irradiance 15. electric current induced by radiant energy 16. use of multiple inverters connected in paralled to service different loads 19. Unit of solar irradiance (L) 20. metal plate immersed in the electrolyte in a battery 23. prevents overcharging of batteries by controlling charge cycle 26. semi-metallic chemical element used in semiconductor material (Si)