Solar panels for home how many do you need? The evergreen question of quantity over quality or careful consideration of your budget in switching to renewable energy. Here are a few details about choosing the right number of solar panels for home you live in.
Before we start, some key information needs to be introduced when it comes to measuring solar power. You might already know that watts are used to measure electricity and a thousand of them gives one kilowatt (kW). When you add time to that, you have a kilowatt-hour (kWh), which corresponds to one thousand watts of electricity in an hour. This is the measure used in solar panels as well, so it is advised to be familiar with the unit of kWh, which refers to the amount of energy produced by solar panels for home or other utility.
Calculations and measurements
Our houses differ in size, roofing area or even exposure to sunlight. Moreover, you are aware of how much electricity you consume normally (this is why it is better to keep yourutility bills). When determining the choice of solar panels for home, all the above factors need to be considered. Take notice of how many kWhs are usually used by your household and learn how much energy can be provided by a single panel.
Energy supplied by solar panels for home
A solar panel is a collection of modules assembled of numerous solar cells that convert sunlight into energy. It is advised for a professional solar company representative to estimate how many panels you might need, but a rough estimation can give some idea about possible costs of the investment. To calculate that, you need to know solar panels for home expected outputs. Usually, a solar panel has the capacity of producing between 225 to 350 watts, with the most common average of about 265 watts. Some solar panels have better wattage – they are more modern, newer and their efficiency is higher. This quality also has to be considered when calculating the number of panels you need.
If you are considering getting a solar panel installation, your potential provider will be able to give all the necessary details about their offer, including their panels’ capacity. Contact them to calculate that and learn about the solar panel production ratio, that is necessary to estimate how many you will need.
Average energy consumption by houses
Now that you know the average electricity consumption of your house and the output of solar panels for home offered by the company you want to hire, it is time to calculate the number of panels. The average American household uses about 11,000 kWh in a year. The average solar panel production ratio varies between 1,31 and 1,61, while the average solar panel capacity is 250 kWh. The formula is as follows:
annual household consumption (divided by) solar production ratio (divided by) panel’s capacity
Typically, you will need 28 – 34 solar panels to cover your electricity consumption.