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BASIC ELECTRICITY
- 1. BASIC ELECTRICITY forPVs Part One: Volts, Amps, Watts Series and Parallel Wiring
- 2. Volts, Amps, Watts CourtesyClay Atcheson
- 3. Copyright 2009 HalAronson VOLTS • Difference causes “force” • Electromotive Force • Water Analogy: “Pressure”
- 4. Copyright 2009 HalAronson High Volts or Low Volts? Courtesy Clay Atcheson
- 5. Volts, Amps, Watts Copyright2009 Hal Aronson Courtesy Clay Atcheson
- 6. Copyright 2009 HalAronson AMPS • Current, Flow of Electrical Charges • Only measurable when circuit is closed (on) • Water Analogy: GPM, volume
- 7. Copyright 2009 HalAronson Can we measure Amps? Can we measure Volts?
- 8. Copyright 2009 HalAronson Can we measure Amps now? How about Volts? How would you measure it?
- 9. Copyright 2009 HalAronson Demonstration Volts and Amps
- 10. Copyright 2009 HalAronson Describe this River in terms of Volts and Amps
- 11. Copyright 2009 HalAronson Compare this same Waterfall in two different seasons in terms of Volts and Amps
- 12. Copyright 2009 HalAronson Watts: Rate of Power Watts: Unit of electrical power, the rate at which energy is being used or generated. In Solar PV, the amount of power a module or an array can generate.
- 13. Copyright 2009 HalAronson
- 14. Copyright 2009 HalAronson Watts is the Product of Volts and Amps Volts x Amps = Watts 12 volts x 5 amps = 60 watts
- 15. Copyright 2009 HalAronson Watts is the Product of Volts and Amps Volts x Amps = Watts Typical light bulb is 60 watts 120 volts x 0.5 amps = 60 watts 12 volts x 5 amps = 60 watts
- 16. Copyright 2009 HalAronson PRACTICE • Write Definitions for Volts, Amps, Watts. Include the Water analogy • Solve the Power Formula Equations on the White board • Share (and check) your answers with neighbor
- 17. Copyright 2009 HalAronson Practice Using Power Formulas • 2 volts x 2 amps = ___________watts • 4 volts x 2 amps = __________watts • 12 volts x 2 amps = _________watts • 12 volts x 10 amps = _________watts • 24 volts x 20 amps = _________watts • 500 volts x 10 amps = ________watts
- 18. Do Lab #1:Photovoltaic effect Copyright 2009 Hal Aronson
- 19. The PhotoVoltaic Effect:DeBrief • First: Write in Journals: • Second: Discussion • Energy Transformation: LightElectricty Discuss their explorations: shade, orientation, reflection, concentration Copyright 2009 Hal Aronson
- 20. Copyright 2009 HalAronson Part 2: Series and Parallel Wiring
- 21. Copyright 2009 HalAronson Pressure of One Cylinder of Water
- 22. Copyright 2009 HalAronson Double the height of the cylinder…
- 23. Copyright 2009 HalAronson In similar fashion when we double the battery in series (pos to neg)
- 24. Copyright 2009 HalAronson In series wiring we wire the positive of one of the power sources to the negative terminal of the other power source. E.g. two batteries into a flashlight 1.5 volts + 1.5 volts = 3 volts
- 25. Copyright 2009 HalAronson In series wiring Volts add up and amps stay constant 1.5 volts + 1.5 volts = 3 volts
- 26. Copyright 2009 HalAronson Do Lab #2
- 27. Copyright 2009 HalAronson The same holds true for wiring Solar Modules in Series 0.5 volts 0.4 amps 0.5 volts 0.4 amps 0.5 volts 0.4 amps 0.5 volts 0.4 amps Four 0.5 volt modules in series will produce 4 x 0.5 volts = 2 volts The amperage will stay the same
- 28. Copyright 2009 HalAronson The same holds true for wiring Solar Modules in Series 3 volts 1 amp 3 volts 1 amp 3 volts 1 amp 3 volts 1amp
- 29. Copyright 2009 HalAronson Parallel Wiring • In parallel wiring, we connect the positive lead of one source to the positive lead of a second power source. In parallel wiring, the voltage stays the same, but the amps add up.
- 30. Copyright 2009 HalAronson Wiring Solar Modules in Parallel and Parallel 3volts 1 amps 3 volts 1 amps 3 volts 1 amps 3 volts 1 amps 3 volts 1 amps 3 volts 1 amps 3 volts 1 amps 3 volts 1 amps String One: _ volts, _ amps String Two: _volts, _ amps