Category Archives: Solar Panels

What are the different types of solar panels in united states

What are the different types of solar panels?

Today we will try to understand what are the two major types of solar panels, and how to choose from them?

Major types of Solar Panel
Two main types of silicon solar panels are prevalent in the World market:

  • Polycrystalline
  • MonoCrystalline

What are MonoCrystalline Solar Panels ?

There is a type in which solar cells are formed with thin slices of the same crystal of pure silicon. There is not even a small flaw inside that solar cell. Just as the jeweler catches even a small flaw in the diamond, just as a small flaw in the silicon crystal reduces the eclipse of solar energy. But the process of making solar cells without such excessive drawbacks is also very expensive. A solar panel made of such a solar cell is called a monocrystalline solar panel.

What are PolyCrystalline Solar Panels ?

The second type is one in which there are not one but several crystals inside the solar cell. The process of making such solar cells is, on average, somewhat less expensive. Such a panel is called a polycrystalline solar panel. Having multiple crystals in a solar cell is one type of drawback, and due to this, the eclipse of solar energy is slightly less.

One Kilo Watt Solar Power Plant for Residential Load

One Kilo Watt Solar Power Plant for Residential Load

Colorstech provides One Kilo Watt Solar Power Plant for Residential Load. In our 1 KW Solar Plant Setup for homes we have following elements:

  • 1000 Watts Solar Panels – Poly-crystalline
  • 1800 VA Solar Inverter with inbuilt Solar Charge Controller
  • 2 Solar Batteries of 150 Ampere Hours Each.
  • Basic Installation of Power Plant

A 1 Kilo Watts Solar Power Plant is sufficient to run basic loads of

  • 2 Fans
  • 1 Computer/Laptop
  • 2-5 LED Bulbs
  • 1 Refrigerator(5*)

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Difference between On-Grid and Off-Grid Solar Power Systems

Solar Power Systems used in residential and commercial loads can be distinguished as On-Grid and Off-Grid Solar Power Systems.

Difference between On-Grid and Off-Grid Solar Power Systems

To understand the difference between On-Grid and Off-Grid Solar Power Systems we can refer to their respective definitions:

On-Grid Solar Power System

On-Grid Solar Power Systems as the name suggests are Grid Tied or On-Line Solar Power Systems where Solar Electrical Energy is used in conjunction with main electrical supply. Grid Tied Power Systems receive power from Solar Panels Setup and also regular electrical supply by companies.

There is a provision in this kind of Solar Power Plant to switch back and forth between Solar Supply and Regular Supply.

During the night time or when there is cloudy weather and Solar Panels aren’t generating enough electricity to serve electrical loads you can switch back to your regular supply.

Solar Panels produce DC electricity and hence they are connected to a inverter which converts DC to AC and serves residential or commercial load.

Net-metering services are becoming common now a day where users have to pay only for electrical usage that is done when Solar Panels are unable to deliver required power. If consumers generate more electrical power from Solar Panels than their regular load consumption then they can supply that extra power to Electrical Grid and they will be paid as per the tariff rates.

In an On-Grid Power System there is no option to save the electricity from Solar Panels.

Off-Grid Solar Power System

Off grid solar power system is same as on grid system but you can store electricity generated by Solar Panels in batteries here.

In an off grid solar power system Solar Panels are connected to Solar Charge Controllers which are connected to Solar Batteries to store Electricity.

Off-Grid Solar Power System may or may not be connected to electrical supply mains.

Solar Batteries are connected with electrical inverters to serve AC loads.

Technical Specification of Batteries, Inverters and Solar Panels depend upon the Electrical Load Consumption.

Conclusion: On-Grid Solar Power System is without any power saving device and serves electrical load On-line when Sun is bright and an Off-Grid Solar Power System can be used to serve the load online as well as save power in batteries for later use when sunlight would fade.


Why are Solar Panels useful for our society.

Solar Panels

Work on Either

Photovoltaic model


Solar-Thermal model.

Solar Panels are electrical devices that can convert Solar Energy or the Light falling from Sun into electrical energy. The fuel cost is zero, the cost of generation is mainly the operation cost. Sun light is available upto and average of 10 hours a day in many countries and hence solar energy can be a useful source to generate electricity and such a source that is free of cost and naturally available. One of the most important factors of using solar energy is that it is a pollution free energy source that is readily available to us, the cost of generation is also low as compared to some other sources.

With the use of Solar Energy the need of Nuclear power will be considerably less as the generation of electricity by means of Nuclear Power produces harmful wastes.

Sometimes Fuel is required from other countries and hence countries have to pay the suppliers huge amount of money in order to fulfill the fuel demands to generate electricity. Solar Energy is available to every country and hence there is no need to be dependent on other countries.

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Working Block DIagram of Solar Cell Used in Solar Panels

How Solar Panels Work

Solar Panels are constructed from solar cells , when energy in form of Sun Light ( Photons ) falls on the surface of solar cells electricity is generated by Photovoltaic Effect. The majority of modules use wafer-based crystalline silicon cells or thin film cells based on cadmium telluride or silicon. The electricity thus generated is in DC and it is used to charge the batteries , the power from these charged batteries is taken out and can be fed into the DC power driven appliances based on the rated voltage, if the appliances run on Alternating Current ( AC ) Inverters Solar are used along with batteries to convert the DC into AC. The inverters of rated capacity are used to serve the loads.
MPPT charge controller and Hybrid Inverters are used to maintain the efficiency of Solar Panel Systems.

A complete system consists of A Solar Panel ( Array ) , Inverter , Batteries , Mounting Structure and Wires.

Working Block DIagram of Solar Cell Used in Solar Panels

For complete understanding of How Solar Panels Work you can refer to this working block Diagram of Solar Cell.

In this block diagram you can see a Glass Lens Place that is mounted on the top of solar cell and below that glass layer there are three more layers:

  • Layer with N-Type Silicon
  • The Depletion Layer
  • Layer with P-Type Silicon

The N-Type Silicon Layer consists of Negatively Charged Electrons. The P-Type Silicon Layer Consists of Positively Charged Holes.

The Depletion layer of this PN Structure stops Electrons. Electrons must jump from valence band to conduction band for current flow. They need energy to cross this depletion layer and that energy is supplied by the Power in Sun Lights. When sun light fall on the surface of this Solar Photo-Voltaic Cell the electron flow occurs and hence we get the necessary electricity in DC ( Direct Current Form ). The voltage produced by these cells is of magnitude .58 Volts Approximately.

Metallic Strips are mounted on the structure to complete the circuit and get electrical output.

You can connect these cells in arrays to form a bigger structure and get Voltage and Current as per power requirement. A Solar Panel is an array of similar cells explained above.

Many Solar Panels can be connected in Series or Parallel or a Combination of Series and Parallel to get Required Electrical Power.

You can Refer to this block diagram to understand how a Solar Power Plant works :

Solar Power Plant Block Diagram

Read This Article For Working of Solar Power Plant for Residential Use