Grid tied solar power systems are the most common installed systems for companies and households who have access to the national electricity grid. But what is a grid tied solar power system and what are its advantages and disadvantage?
What is a grid tied solar power system.
In layman's term a grid tied solar power system is a solar powered system which is connected to national power grid. While the sun is shining the photovoltaic solar panels convert the sun's rays into electricity. Electricity generated by the system can be used for your home and business. Any excess power requirements which your solar panels can not supply will be taken from the national power grid. When the power grid is running properly, your home or business will use power generated from your solar panels and/or pull electricity from the grid. If at any time you generate more electricity from your solar panels as your current power requirements this excess power will feed back into the national power grid. This excess power fed back into the national power grid can give you credit's on your electricity bill.
Advantages of a grid tied solar power system.
The main advantage of a grid tied solar power system is that you can start small and gradually add on to the system depending on your power requirements and budget. Your power requirements should always be met. If you don't generate enough energy through solar the national electricity grid will supply the extra power requirements. Excess power for example on weekends when a business generally requires less electricity can be fed back into the national grid. With A grid tied system you can start reducing your electricity bill with a relative low investment.
Disadvantages of a grid tied solar power system
The disadvantage of a grid tied solar system is it only works during the day when the sun is shining and when the national power grid is fully functional. If during the day the national electricity grid fails due to for example load shedding your grid tied solar power system will switch of automatically as well. All grid tied systems will switch off during a power outage because these systems are required by law to feature an automatic shut-off mechanism. These requirements are in place to protect workers working on the power grid during a power outage. This is known as an Anti-Islanding requirement.
So in short the system will not save energy during the night as you will be fully depending on your national power grid and they will not provide electricity during blackouts and load shedding.
A grid tied solar power system will save money but you will always be depending on the national power grid for your electricity needs.