Solar Power Generator
Create a solar powered, motion detecting, long distance, wireless alarm with 110V AC outlet.
Parts:
Estimated cost = $314.38
Chiefly compare on a Dollar/Watt basis.
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.
Temperature
sensor on most models.
Maintains
longer life of batteries.
Controls
voltage and amperage input to the batteries.
Not a absolutely necessary item.
Recommend a control with built-in amp meters and volt meters?
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 +85ºC Maximum array short circuit current 8.1 amps Notes http://www.morningstarcorp.com/
Just regular RV or deep cycle batteries last about a year
Golf cart batteries last 3 year
Standard commercial solar system batteries last from 6 to 9 year
Some very expensive batteries have operated in systems for 15 year
Fully charged is when the battery reads about 14.5 volts without the panel.
Its best not to completely discharge a deep cycle battery
www.optimabatteries.com/main.htm expensive but nicer than normal.
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
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 ac±10% Output frequency 60Hz±2.5Hz 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
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 131°F
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 -13°F to 131°F (-25°C to 55°C) 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
Radio Shack #273-1859 Cost $17.99 at Radio Shack
Output1000mA Features Fuseless, self resetting technology.
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
Wire - ~$10
Carrying case - ~$0 (Already have a plastic tool box that can be used.)
Mounting straps/bolts ~$10
Switches - ~$10
Meters - ~$25
Outlets - ~$5
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 kWhWe 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)
