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Friday, January 22nd 2010

5:06 AM

How Does The Different Parts Of A PV Solar Powered Electrical System Work?

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There are ten different components that make up a solar powered generating system. Of course you don't have to use all them. You can pick and choose depending on what type of system you want to end up with.

Just to emphasize that point. For example, we talk about having a diesel generator as a back-up system, but you don't to have to start off with one, and you can add it at a later date if you think it is necessary.

Photovoltaic Solar Panels

Solar cells are placed in direct sunlight, and they transform daylight into electricity. It converts it into DC electricity. You can connect as many panels as you like together, this is called a solar panel array.

They are connected in series so the flow of electricity is from to the next one in line. That is why you can have as many panels as you like and the more you have the electricity you generate.

DC Disconnect

The energy you produce flows to the DC disconnect. It is important if you want to do some maintenance on your system as it switches on and off the flow of electricity to your solar powered system.

Charge Controller

If you are using a battery bank to store any unused electricity then I strongly suggest you fit a charge controller to your system. This prevents your batteries from becoming over charged, which can damage them.

Batteries

Read up on the different types of batteries and get familiar with them. The type you need is deep cycle. These batteries are often used in forklift vehicles. Do not use car batteries.

Batteries also perform better when they are warm. If you don't have room in the house for them, make them a shelter outside, never leave them exposed. A battery box is also a good investment, they keep your batteries at a good temperature and also protect them from accidental damage.

System Meter

Your solar system meter is, in effect, your dashboard. It tells you the amount of electricity you are generating, consuming and how much is stored in your batteries. You don't want to work blind, they don't cost very much are really worth their weight in gold.

DC Disconnect to the Main Supply

The main DC disconnect is used to turn off the power from your battery. You want to locate it between your battery and your alternating current and direct current inverter. This turns off the power from your batteries, which then allows you to undertake any preventative maintenance.

DC To AC Inverter

Solar panels and batteries produce a DC current. However, all your appliances in your home use AC current. We convert DC to AC using the inverter and so all your electrical home appliances work without any problems.

Generator

There are various types of electric generators to choose from. If your home is off-grid then it is definitely worth considering adding one of these to your system. The generator can produce electricity when there is no sun or when the batteries are run down.

Alternating Current Breaker Panel

The AC breaker panel switches off the flow of electricity either from the grid to your home or your home to the grid. Although all houses have them, only the electric company is allowed to wire them up. You have to get the electric company to come along and wire it up for you.

Don't be tempted to do it yourself, it is a criminal offence for unqualified people to touch these panels, and you want it to be done correctly..

KW per Hour Meter

Every house with a utility electric supplier has an electric meter. The meter measures your electric usage and your bill is calculated based on the figures from this meter. So if you send power back to the grid, this will go in reverse.

Learning to build a solar panel is the first step. The second step is to design a system that will work in your home. Visit Build a Solar Panel and get full instructions on how to put it all together.

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Tuesday, January 12th 2010

1:42 AM

Build a Solar Panel - Preparation Is The key To Success!

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When you build a solar panel, it is very important that you have the right plan before you start. This includes detailed instructions, tools and materials.

Learn more about how to build a solar panel or visit here to understand how to Build a Solar Panel if money is in short supply.

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Monday, January 11th 2010

8:00 AM

Build a Solar Panel - Preparation Is The key To Success!

Locating Solar Cells

Depending on what size solar panel you are going to build, will dictate how many solar cells you are going to need. You can always buy solar cells of the shelf but this can be expensive, an alternative is eBay or find a local company that uses solar cells in their products. Like road signs, these get damaged and chipped and get thrown away. The good news is that the solar cells work fine and just need a bit of TLC.

Strong Plywood

The plywood is the main part of the construction of your solar panel. Choose your plywood with care, you want a quality piece which is nice and flat. We will be treating the plywood later to make sure it doesn’t rot when left outside to the elements.

Wood

If you get a piece of 2"x1" and cut a rebate this will make a good frame to keep the flexible-glass in place. Hardwood is best but whatever wood you get , we will protect it with UV paint.

Flexi-Glass

Flexi- glass is used to protect the solar cells and all the electrical wiring. Some people like to use special glass that has the ability to collect infrared light. This is expensive but it will make your solar panel more efficient as the infrared feature will allow you to convert the suns energy in cloudy conditions.

Solder Tabbing Wire

Tabbing wire is great for connecting the different solar cells together and so making a complete solar panel assembly. Tabbing wire is made from tin, it is very plyable and has a low melting point.

Silicone Sealant

Silicon is used to make the solar panel water tight by filling the gap between the flexi glass and the wooden frame. The second advantage is that it has some glue like properties and so can be used to secure the solar cells to the plywood.

Wiring Solder

The solar cells are joined to the copper wire using solder. The copper wires carry the current, which the solar cells have produced, to either an inverter, or batteries or to the grid. It is also used to hold the tabbing wire in place should it lift in certain places.

Flux Pen

A flux pen is used to assist the tabbing wire to stick to the solar cells. You run the pen over the area where you want the wire to be assembled and then with the aid of a soldering iron, the tabbing wire is secured in position.

UV Plywood Protector

Both the plywood and the wooden frame should be treated with a UV protector. This will protect your solar panel from the sun's UV light which has a tendency to rot wood very quickly.

Volt Meter

The volt meter is used to test each cells output as it is assembled to the board. As you add more cells, so the output should increase.

To find out about the best way to build a solar panel take a look at how to Build a Solar Panel on a shoe string.
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Friday, January 8th 2010

8:02 AM

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