Thursday, August 16, 2018

Calculations for Installing Solar Panels on Your Roof


India is achieving total power sufficiency in the coming year. And yet, there continue to be the outages of power that keeps everyone scrambling for the UPS units. These UPS units have the power to keep them going even when the power supply is down. Yet some others are setting up their own solar grid to connect to their UPS so they become independent of the normal power supply.

Check for the Top UPS Supplier

The first step to achieving the solar grid is to buy the solar panels. To buy small solar panel online India has many stores. The growth rate of the UPS market in India remains projected at 12% for the five years 2013-18. Search for the top UPS supplier in India and you will find the list of the best suppliers. You can depend on them because many of them have won export awards in the past decade. Choose only those with at least 20-25 years of experience in this field.

Different Kinds of Solar Panels

You can use many different combinations for getting the power you need. So, it is possible to make a 4 kW solar panel system with 20 200-Watt or 16 250-Watt panels. The output of the solar panel depends on the type of panel you choose.
     Monocrystalline solar panels
     Polycrystalline solar panels
     Thin-film solar cells
     Amorphous silicon solar cells
     Bio-Hybrid solar cells
     Concentrated PV cells
The efficiency is the most for the Concentrated PV cells. These show a conversion rate of almost 41% as compared to the 20% of the Monocrystalline solar panels that come next. The other two have low costs due to their lower efficiencies. The Polycrystalline has 15% efficiency while the Thin-film solar cells have 7-8% efficiency.

Contact the Solar Panel Supplier

If you have any more doubts, visit the website of the supplier of the solar panel online. You can see all the specifications there. You can contact them through the help section to clarify your doubts. They will tell you which is the best solar panel to buy as per your energy needs.

Find the Number of Panels Needed
You will need 100 square feet area for putting up solar panels to produce 1 kW of power. This will on an average produce 1650-1750 kWh of electricity in one year. That is about 143-153 kWh of electricity per month. A typical house with 5-6 light bulbs, computer, fans, TV, refrigerator, and all will need 9.56 kWh for one day.

By eliminating the standby power support to only the appliances we need, the power need will come to 1.8 kWh or say 2 kWh. Divide this by the insolation (assume it to be 4 kWh/m²) and multiplying it by the safety margin of 34%, we get this to be 2x1.34/4 = 0.67 W.

Now, we see that we need 670/120 = 5.6 or 6 panels. (We use 120 Watt panels). So we need the space on the roof for 6 panels. The typical size of one panel is 65x39 inches. We need 106 square feet of space. We put the inverter size at more than that of the solar panels so throttling gets eliminated.


Author: verified_user