Solar Power Generator

Create a solar powered, motion detecting, long distance, wireless alarm with 110V AC outlet.

Parts:

Estimated cost = $314.38

Solar Panel

Used Cell Phone Solar Panel
Cost $105.62 on eBay ($4.40/watt)
Watts 24 watts
Volts (no load) 17 volts
Amps (in full sun) 2 amps
Dimensions (inches) 26 3/8" x 17 3/4" x 3/4"
Weight 13 pounds
Blocking diode No
Notes Glass covered and mounted on a metal frame.

Voltage Controller

Resources:

Morning Star
Cost

$56.00 on eBay

Model SunSaver-6
Rated Solar Current 6.5 amps
Rated Load Current 6.0 amps
System Voltage 12 volts
Maximum PV Volts 25 volts
Low Voltage Disconnect 11.5 volts
Low Voltage Reconnect 12.6 volts
Weight 8 ounces
Dimensions 6.0" x 2.18" x 1.32"
Wire Size #10 AWG (5.2 mm2)
25% Current Overload 5 min.
Regulation Voltage (Sealed Battery) 14.1 volts
Regulation Voltage (Flooded Battery) 14.1 volts
Temperature Compensation (mV/C) 28
Self-consumption 6 to 10 mA
Operating Temp. 40 to +85C
Maximum array short circuit current 8.1 amps
Notes http://www.morningstarcorp.com/

Deep Cycle Battery

MK Battery
Cost $66.42 = $1.33/AH(20hr@50AH) on eBay
Model M22NF SLD G
Voltage 12
Amp Hour (5 hours) 37.8 AH
Amp Hour (20 hours) 50 AH
Reserve Capacity 69
Weight 38 pounds
Dimensions 9.38" x 5.50" x 9.25"
Charge Voltage Limited to 14.1 volts (2.35 v per cell at 68 degrees Farenheit.)
Notes http://www.quakepro.com/mkbattery/products1.htm

Power Inverter  

Half Water Enterprise Co., Inc. Power Inverter
Cost $26.34 on eBay
Continuous Power 300 watts
Peak Power 600 watts
DC Input voltage 10.5 volts - 15 volts
Input current 30 amps
Input no-load current 0.2 amps
Output voltage  110Vrms ac10%
Output frequency 60Hz2.5Hz
Output wave form Modified Sine Wave (Bad)
Efficiency 80%-90%
Short Circuit Protection Yes
Over Load Protection Yes
Over Temperature Protection Yes
Over Voltage Protection Yes
Under Voltage Protection Yes
Dimensions 6.57" x 4.25" x 2.4"
Weight 1.72 pounds
Notes http://www.halfwater.com.tw

Relay

Radio Shack #275-241 SPDT 12VDC Relay
Cost $4.29 at Radio Shack
Coil Voltage 12 volts -15.6 volts
Nominal current 37.5 mA
Pick-up voltage 9 volts
Drop-out voltage 0.6 volts
Coil resistance 320 ohms 10%
Life 100,000 cycles
Operating temperature -22 to 131F

Photoelectric Detector

Optex AX-70T
Cost $102.50 from the Internet

Detection Method

Infrared Photoelectric
Range outdoor 70ft. (21m); indoor 165ft. (50m)

Maximum Arrival Distance

700ft. (210m)

Beam Characteristics 1,000pps. 8,800A pulsed infrared
Interruption Period 50 to 500msec (variable)
Power Input 10 ~ 30VDC
Current Draw 30mA max (10 ~ 30VDC)
Indicator Transmitter-Green LED On in transmitting condition.
Receiver-Red LED On in alarm condition.
Alarm Period 2 sec (1) nominal
Alarm Output N.C. 28VDC, 0.2A max
Tamper Switch Opens when cover is removed.
Operating Temperature -13F to 131F (-25C to 55C)
Environment Humidity

95% Max.

Alignment Angle 5 Vertical, 90 Horizontal
Mounting Wall or Pole
Dimensions inches (mm) 6.57"/H x 2.64"/W x 2.58"/D (167/H x 67/W x 66.5/D)
Weight 24.3oz (690g)
Standard Accessories Screws (0.6" x 3/4" self tapping) x 4 Pole mount kit

6-Volt DC-to-DC adapter

Radio Shack #273-1859
Cost $17.99 at Radio Shack

Output
1000mA
Features Fuseless, self resetting technology.

2-way Radio

Midland GXT500
Cost $22.00 at Buy.com
Size 4 1⁄8" H x 2 3⁄8" W x 1 3⁄8" D
Channels 22
Power 6 volts

Accessories

Calculations

Calculations for power availability (watts/hour) on a full charge:

Assumption #1: The battery will be drained to 60% of capacity after 5 hours time.

37.8 amp * hours / 5 hours = 7.56 amps (current)
7.56 amps * 12 volts = 90.72 watts (power)
7.56 amps * 12 volts * 5 hours = 453.5 watt * hours = 0.4535 kWh

We can only draw 40% of the total power in order to save the life-span of the battery:

453.5  watt * hours * 0.4 = 181.4  watt * hours (energy)

But the inverter is only 80%-90% efficient!

181.4 watt * hours  * 0.8 = 145.12 watt * hours = 0.14512 kWh

Over 5 hours time that provides us how many watts per hour?

145.12 watt * hours / 5 hours = 29.024 watts 

Calculations for battery recharge time in full sun:

How many watt-hours have we used?  The loss of power in the inverter must be considered, so...

181.44 watt * hours

How many watts per hour can my solar cell provide?

2 amps * 12 volts = 24 watts
181.44 watt * hours / 24 watts =
7.56 hours (Energy/Power = Time)

Links

http://www.rain.org/~philfear/how2solar.html

http://pub16.ezboard.com/flibertyquestandfreedomboardfrm11

http://www.i4at.org/surv/solargen.htm

www.otherpower.com/otherpower_solar.html

http://agitator.dynip.com