# Learn how to calculate the number of solar panels you need

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A solar panel array is one of the free and environmentally friendly energy that you can prefer for powering your household. Among the factors to consider before installation of a solar panel array is the number of solar panels.

There are many things that have to be taken into consideration since different households have different energy needs. It requires a clear calculation of the number of solar panels that are necessary to power your house. There is a straightforward algorithm that makes it easy for one to calculate the number of solar panels needed in his or her home.

This calculus requires your monthly electricity bill in order to find out your electricity usage. It also important to know duration or number of hours of sunlight your house receives every day and how many watts your solar panels can produce.

**1. Calculate the electricity usage of your house**#### Determining the average electricity your house consumes is the first step towards finding out your electricity usage. Electricity bills are one of the most reliable sources where the information regarding how much electricity house consumes can be found. The energy you consume fluctuates from one month to the next hence an average number is recommended. You could spend more energy in seasons such as winter. Take one of the winter bills as a basis for your calculus. The number of kilowatt hours of electricity used during that month is also indicated in the electricity bill. Divide the number of kilowatt hours of electricity used by the number of days in a month to find out your daily energy usage.

**2. The number of sun hours in your area**#### The solar panels produce energy as long as the sun is shining. Know the approximate number of hours of the day your house receives sunlight. The winter days should be considered as the base since the house at this times receives the least amount of sunlight.

**2. The number of sun hours in your area****3. The amount of energy per hour your panels need to produce.**#### You know how much energy per day your house needs. Multiply that number by 1000 to transform the kilowatts in watts. Divide that number by the number of sun hours (6 in our example). Now you know how much energy the panels have to produce per hour.

**4. The angle of inclination and the roof space**#### The roof is the right point to install your panels. Before installing them, you should consider seeing the amount of space on the roof to install them and the angle of inclination of the roof. You should then consider positioning your panels at an angle that receives that maximum sunlight during installation.

**4. The angle of inclination and the roof space****5. Determine the number of panels you need**#### The number of watts the panels you have to produce is the final piece of information you should have. Consider being attention to the number of watts written on the label when buying the panels. An average panel produces around 100 watts, but larger panels can produce more. If you want to buy 100-watt panels, divide the number of watts per hour you calculated in the last step by 100, and you will find out how many panels you need to power your house.

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