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SOLAR POWER PRESENTATION
ISM Grade 12 Phys/Chem
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Cell Anatomy
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Silicon Layers
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Electric Field
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Generating Electricity
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Voltage & Current
Creating a Circuit
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http://solardat.uoregon.edu/PolarSunChartProgram.html
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!
"solarpanel
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Solar panel
many shapes, power, chemistries..
intermittent generator1.4kWh per watt per year
most expensive part of the system
positioning is key!
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!
"charge
controller
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Charge controller
regulates voltage between panel & battery
variable input voltage, steady output voltageencoded to regulate
the charge current
protect the battery from over charge/discharge
can offer load control or timer function
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!
"
battery
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Battery
most temperamental part of the system
solar applications require deep discharge
capacity measured in Ah, but not all useable
V x Ah = Wh
12, 24 & 48v common
must factor in several days of storage & inefficiency
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!
"inverter
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Inverter
converts DC to AC
must be sized for peak loadmost sophisticated part of the
system
need to consider frequency
unnecessary if only DC loads
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!
"loads
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Air-con
Room = 1000 watts
Central - 2000-5000
Clock radio = 10
Clothes iron = 10001800 Coffee maker = 9001200
Clothes washer = 350500
Clothes dryer = 18005000
Dishwasher = 12002400
Dehumidifier = 785
Ceiling fan / Standing fan = 65175 /
40-80
Hair dryer = 12001875
Microwave oven = 7501100
Personal computer
CPU - awake / asleep = 120 / 30
Monitor - awake / asleep = 150 / 30
Laptop = 50
Radio (stereo) = 70400
Refrigerator (frost-free, 16 cubic feet) =
725
Televisions
15" LCD = 20-3017" CRT = 70-80
32" LCD = 130-150
42 Plasma = 250-400
Toaster = 8001400
Toaster oven = 1225
VCR/DVD = 1721 / 2025
Vacuum cleaner = 10001440
Water heater (40 gallon) = 45005500
Water pump (deep well) = 2501100
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Sample calculationsystem to power a toaster oven for
breakfast
Panel size:800W * 15mins/day = 200Wh/d or 73kWh/yr
73kWh1.4kWh/yr = 52watts
52watts80% = 65wattsBattery size:200Wh12V = 16.7Ah
17Ah *3 = 50Ah50Ah40% = 125Ah
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!65W
12v, 125Ah
800W
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A few guidelines..
look for southern exposure
minimize wiring distances
assume 80% efficiency from panel to load
if theres a dc option, take it
be creativebut efficient
