Step by Step Guide to Residential Solar Power System

For the installation of a Photovoltaic Solar Energy System, firstly you have to check out that how much solar energy is usually absorbed by your panel which depends on the mean daily solar radiations for your area.

1. Calculating the Potential Solar Radiation Power

The average Solar energy obtained is about 4-5 kWh/m2/day, in most of the areas but in some areas it even reaches to 8.

Solar power

In order to check your area, please concern to this map which is provided by the National Renewable Energy Laboratory (NREL) Resource Assessment Program. In the units kWh/m2/day, where kWh stands for kilowatt hour, with “m” is the area of the absorber, for this case, the photovoltaic cell, with square meters. Where the solar panels work with the efficiency of ranging from 7 to 17%.

Solar Radiation (kWh/m2/day) X % of Solar Panel’s Efficiency (7%) = Tot, Power in kW a solar Panel (2m2) can generate Daily

Keeping in mind the above formula, your habitat consist of an average solar radiation of 4.5 kWh/m2/day in the surface area of about 1m2 of photovoltaic cells, then the resultant can be 0.315 kWh/day (315 Watt/day) with the efficiency of about 7% of an average solar panel.

2. Determine Your Average Energy Usage

Once you come to know that how much solar energy you are obtaining from the sun then you can calculate that how much energy you need on your recent energy involvement.

With the help of Energy Information administration, you can take a look on the state by the state averages, if you don’t have copies of your last 12 bills. By looking at this chart, a consumer living in New Jersey, for some time, will use an average of about 730 kWh/month in electricity, whereas the person living in Alabama will be in benefit and may use as much as 1300 kWh of the energy per month.

3. Calculate the Number of Panels Needed

By all the above process you have come to know the solar radiations which are available and how much of it can actually be used by a solar panel, in order to replace your current source of electricity you can calculate how many photovoltaic solar panels you will need.

Solar Radiation (kWh/m2/day) X Surface Area Of the Panels in m2 X 7% Estimated Solar Panel Efficiency X Average Days per Month (365/12) = kWh Produced per Panel Each Month

solar panel

You will be able to find out the exact size of each cell in square meters, also, which is also in the website of, your manufacturer of choice or in the literature.

KWh Produced per Panel Each Month / Average Energy Usage per month (1000 kWh) =N.of Solar Panels you will need to Cover your Energy Usage

If we use an average energy usage of 1000 kWh per month, we will calculate: ”Solar radiation” X “Surface area of the panel in m2” X “0.07(where the solar energy efficiency have been estimated as 7%) X“ Average days per month”(365/12).Then this number will be divided by 1000(the average energy usage of 1000 kWh per month).

For example, an area which receives the solar radiations of 5 kWh/m2/day, whose solar panel is 2m2 then according to the above equation.

5(Solar Radiation) X 2(Surface area of standard solar panels) X 0.07(solar panel efficiency) X 30.42(average n of days per month) = 21.294 kWh produced per panel each month.

In order to cover at 100% the month KW usage of 1000 kW divide 1,000/21.294 = 47.As the answer is 47, which means that you need 47m2 of panels to fully eliminate your electricity bill.

4. Find upfront Cost VS Long-term savings

Major factor is the upfront cost of a photovoltaic solar system for many people. You can overcome your initial investments with the help of yearly utility savings and the government incentives. It also depends upon the size of the system that you will install.

KWh Produced per Panel Each Month X Cost of Electricity per kWhX12 Months=$ Savings of Electricity Cost per Year X Panel X N of Solar Panels = Total Yearly $ Savings

If u consider a single 2m2 of solar panel can produce 21.294 kWh/month and 20% per kWh has been charged by your electricity company, then you will be able to save about $51.2/year.Whereas 10 X 2m2 solar panels could let you save 512$/year.

You will have to payback 10,000$ if that system costs $20,000 and Governmental rebates/Tax Credits may let you cover/cut the cost by 50%.For paying off the system for 10 X 2m2 solar panels, it would take you about 19.5 years and you will be having a true saving. The savings and pay-off period could be lessened in the areas where the kWh cost is more.

How to sell Solar Energy To a Utility Company?

If you are planning or if you have taken the energy-efficiency of installing solar power at your place that is home or business and you even know that this act can be the costly also. The investments for a solar panel system can be rapidly paid for by selling your energy to the company.

The government also needs power which it obtain from the consumers and it usually requires 42 states and most probably the district of Columbia. States are very important and they are the factors for containing advantage from this process and the best rate you will receive for your surplus energy, which varies from place to place. So the states play an important role in this process. Let’s take a quick look at the solar energy which is generated.

How to Make Solar Heat Panels?

Now we will learn how to make panels after doing all the processes. The process of making solar heat panels is very easy and they are not very expensive. They are very essential as they help to lessen the cost of heating your homes by the use of power of the sun. As the sunlight falls directly in the room at the direction of south, that’s why the rooms in which the sunlight falls directly from the south, this process is more effective and provides much more solar energy to that room.

The process of making a solar panel is as simple as to modify the aluminum storm window to absorb the heat energy and pass it to the room by the vent or through a window. We will also need the warm air that’s why if we are using a window to absorb the warm air in, for that the opening should be air tight around the vent. It is important to replace the warm air otherwise it will be replaced by the cold air.

By making the use of old aluminum window, a piece of backed which will be non-conductor and a vent into the room, the solar heat will be absorbed by the window with the foil at the back and with the help of some fans the warm air will be drawn into the room where the vent is placed. It is now granting as it is very complicated but actually it is the basic structure for this plan. The rays will travel forming an angle so that it can be absorbed by the window and the vent should be sealed in such a way that it should not let air to move in or out, in this way the warm air will be in the room and with the help of vent the cold air would not be able to enter the room.


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