Everything You Need to Know about Solar Panels
Are you concerned about the integrity of the environment or perhaps looking for new ways at benefiting from the energy the environment has to offer? Do you already own a specific energy system, and would like to lower your carbon emissions?
With the growing effects of global warming and carbon pollution, environmental conservation has become a priority. In addition, the rising costs of energy products is on the rise, thus switching to greener forms of energy that still allow you to meet the energy requirements for your home or business is an important step towards protecting our environment from further threats.
Have you considered switching to solar panels? As they can provide you with an effective energy source to meet your energy needs at an affordable price.
Here you will find answers to the vital questions you might have about solar panels.
Solar panels convert sunlight into an electric current or heat used to provide electricity for home or building. Solar panels are constructed as a collection of lots of small solar cells that are spread over a large area to provide enough power. The larger the concentration of light hits the cell the more electricity or heat is produced.
Solar panels work by converting light photons into electricity through the solar photovoltaic (PV) effect. This allows for direct conversion of sunlight into solar power, or electricity. Solar panels use layers of semi-conducting material, most commonly silicon. PV’s are measured by kilowatts peak (KWp).
This measures the rate solar panels generate energy at their peak performance with direct sunlight in the summer. Solar panel cells can either be mounted on rooftops or on the ground, alternatively you could have solar tiles fitted instead, thus completely replacing the already existing rooftop.
Grid-connected systems are connected to the main power grid. The electricity generated by the solar panels is first used for your home and the electricity that is not used by hour home is exported onto the main power grid.
Grid-connected systems will only supply electricity during the day when there is sunlight. When there is no sunlight, your home will use electricity taken from the main power grid. Most grid-connected systems work without the use of battery storage, however this is very much possible with our expandable and modular inverters. With batteries, you will also use your self-generated electricity at times without sunlight.
Off-grid systems are not connected to the main power grid and will have to generate enough electricity to power your home at all times. They are a perfect and often the only solution for homes without a power grid?Ibedrola connection. During the day, the solar panels will generate electricity and supply your home with power. Besides supplying your home with power, they will also charge a battery bank. When the sun goes down, and the solar panels stop generating electricity, your home will use the electricity stored inside the batteries.
Off-grid systems must be designed properly so that it will generate enough electricity to meet your home’s requirements. This includes supplying the house with electricity during multiple days with little sunlight. All of our off-grid systems are designed with 3 days of autonomy. This means that your home will have enough electricity stored inside it’s batteries, to power the house for at least 3 days without sunlight.
Hybrid systems are a mix between grid-connected and off-grid systems. Hybrid systems are connected to the main power grid, but also make use of battery storage.
A hybrid system will supply the house with electricity during the day, and will also charge a battery bank. When the sun goes down, the house will start using the electricity stored inside the batteries. When the electricity in the batteries is depleted, electricity will be taken from the main power grid. With hybrid systems it is also possible to charge the batteries at night using electricity taken from the main power grid. Because this happens at night, this electricity will only cost you the night tariff, in stead of the more expensive day tariff.
In order to choose the right size of your solar system, we must first find out what your average electricity use is. To do this, you can check your energy bill. When the energy bill is not clear or does not show your average use properly, we can install a temporary electricity meter. This device will measure the electricity used in order to give a clear indication of your average use.
The average use of a Spanish home without swimming pool is about 8 kWh per day (24 hours). A swimming pool filter-pump is not calculated in this example. We always advice to let this filter-pump run at night during the night tariff, or we advise a separate solar pool filter pump.
To give you an idea of how much electricity is used by an average home per 24 hours, we give you a small example of what 4 kWh entails. 4 kWh is about half of what the average Spanish home uses per 24 hours.
10 Light bulbs 5-12W – 3 hours per day – 215Wh
42-inch TV – 4 hours per day – 480Wh
Cold washing machine – 0.5 hours per day – 250Wh
Refrigerator A++ – 24 hours – 720Wh
Microwave oven – 0.2 hours per day – 140Wh
Oven – 0.5 hours per day – 900Wh
Washer dryer – 0.5 hours per day – 900Wh
Laptop – 2 hours per day – 150Wh