Posted by Gardening | Posted in Garden Statues and Yard Art | Posted on 03-03-2012
Tags: commercial, exterior, outdoor, powered, solar, solar powered lamp, solar powered lamp post, solar powered lamp post lights, solar powered lamp post with planter, solar powered lamps indoor
 Reading Time Fun Outdoor Solar Powered Lamp Statue US $89.95 
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 Solar powered 5 LED Wall Lamp US $8.75
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how to design a solar panel to store energy and convert it into electrical energy?
first of all, to be honest i have totally no idea on how a solar panel works.
my task is to design something like a solar powered street lamp which store sun energy during day time and convert it into electrical energy then light energy so that the lamp can work during night time.
any ideas on how to design the solar panel? which can store enough or more enegry in case there is no sunlight another day. and low cost as well 
solar panels change light into electricity, and do NOT store power.
You need a solar panel capable of enough power to keep the light on all night. And that may be 6 hours of sun and 12 hours of dark.
Then you need a set of batteries large enough to hold that energy. And a charge controller to regulate the charge into the batteries. And then a light that will operate on the battery voltage, say 12 volts.
This is probably not practical due to the large solar panel required, and the large batteries. But here is a few numbers. Assume a 100 watt light at 12 volts. Assume you get at least 6 hours of sun every day and the light will be on for 12 hours. That means the battery has to store 100*12=1200 watt hours. divide by 12 and that is 100 amp-hours, a large auto battery size.
Allowing for 20% losses in the battery and circuitry, that means you nee 1400 watt hours from the solar panel. Since it has 4 hours to operate, that means it has to deliver 1400/4 = 350 watts at 15 volts.
So there it is: 350 watt panel
100 amp hour battery
charge controller sized for above
100 watt light.
If you have to allow for a day with no sun, then you need more batteries. Two nights means 2400 watt-hours, two batteries, a larger charge controller and a 2800/4 = 700 watt panel.
cost: $400 for batteries
$200 for charge controller
$2000 for panel
.
Keep It Green Ideas: Solar Powered Ligh
The web site, Keep It Green Ideas, is dedicated to bringing ideas about improving our environment. We are doing that through promoting the use of solar powered light. There are many variations of that type of light and solar power is now used for many other ideas as well.
Have you ever thought about a solar lamp post? There are several styles of this type of solar powered light and they often come in white, black, and rust colors. For example, you can get them in a Victorian style with one, two, or three lamps on a post that is about seven-foot tall. The great thing about this type of solar powered light is there are no wires so you can set them up anywhere. As with other solar lights, they have an automatic switch so they come on at dusk, turn off at dawn, and then recharge in the day light.
Another category of solar powered light can be used anywhere because they are so portable. In fact, this style is often in the shape of a lantern or is used on a fence post or deck. There are also lights on a short pole so you can have them along a walkway, entrance to a home, or used in garden landscaping. Some of them have a switch to turn on a color. There are small solar lights that can be used for reading (they have a clip) or hung up as a trouble light.
A third category of solar powered light is the solar garden light. As with the other types of lights, you can really place these anywhere but because they may be in the shape of a gnome with a lantern or a lighthouse, they are often placed in the garden. There are also solar lights in the shape of humming birds or dolphins with chimes. This way, you have both light and sound on your deck, patio, or garden. If you like animals, there are solar garden lights in the shape of dogs with a lantern. They look good in your garden or an entryway to your home. You could even take these with you in an RV or camping. Yes, you can take solar powered lights with you when you travel. They don't need any type of fuel so they are easy to transport, store, and then use. Also, if they get knocked over, you don't have to worry about anything spilling or getting on fire! These smaller lights are great because you can put them anywhere outdoors or indoors.
The fourth category of solar powered light is stainless steel solar lights. These lights are most often used around landscaping, driveways, sidewalks, and other places you want several smaller lights. You may want to just show off an area of a yard or you may want to light a walk area. These lights are less expensive and you can usually buy them in packs of 15 or 24. This category also has spotlights to shine the light in specific places to display some landscaping or other items in a yard, entryway, or deck. This category also has lights to put on a deck, line a boat dock, patio, or anywhere. Solar lights are very flexible in where and how you can use them.
About the Author
For simple green ideas go to Keep It Green Blog or for more information on various solar lights go to Stainless Steel Solar Lights. Follow Keep It Green Ideas on Facebook.
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