The grid-tie inverters connect the local electrical generators such as hydroelectric, wind turbine, and solar panel with the grid. They are responsible for converting the direct current into the alternating current. The electric power from injected by these inverters into the grid is very efficient and safe. This is ensured by matching the phase of the grid sine wave with the voltage. A good-quality grid-tie inverter maintains the output voltage higher than the voltage of the grid. Some of the grid-tie inverters have a fixed power factor which basically means that their current and the voltage are perfectly lined up. These inverters constitute an onboard computer to sense the AC grid waveforms and align the voltage in accordance with the grid. The supply power is contained with the assigned limits otherwise the supply power can increase during the hours such as noon while using a solar panel.
The homeowners can use the alternative power generation source such as wind or solar power without the need of batteries and exhaustive wiring. In the case of alternative power not being sufficient, the power from the grid compensates the shortage of it.
The Types of Grid-Tie Inverters
There are different types of grid-tie inverters available in the market today. Broadly, the inverters are categorized into two types, the low frequency, and the high frequency. Both the types of the grid-tie inverters are available with the transformer coupling. The high-frequency inverters with the transformer coupling convert the power to a high-frequency and revert it back to DC using a computer process. This power then gets finally converted to an AC voltage output suited for the grid.
The inverters without the transformer coupling are smaller and lighter in weight. They are also more efficient than the transformers coupling inverters. The inverters without the transformer coupling have been slowly gaining the popularity.
There are numerous advantages of using the grid-tie inverters both the with the transformer coupling and without. Electricity is one of the best inventions by the mankind. It is as essential for the world to function as the basic life requirements such as air and water. The grid-tie inverter is an efficient and safe power source for both the commercial and residential setups. It is as useful for the huge corporate office that thrives on high power electricity as for a residential complex requiring a safe and sustainable power source.
Some of the benefits of a grid-tie inverter are as follows
- High Efficiency
There are certain businesses or corporate setups that require a lot of power to operate. The grid-tie inverters can fulfill this requirement. They can rely on this power from the inverters if they need the additional electricity. In the countries such as the USA, the businesses with high electricity demand, buy the power from the power companies. A grid-tie inverter plays an imperative role in this process. The grid-tie solar draws the power from the main and fulfills the necessity, the excess power can be sent back to the grid. The power is sold back to the company it was purchased from. In this manner, the power expenses can be curtailed along with a safe and sustainable power usage. This process is known as the net metering. It is highly beneficial for the user as well as the whole community.
The high efficiency of this inverter also gets utilized maximum by the people living in suburban and rural areas that face the electricity-cut issue. People living in rural areas cannot do with the regular off- grid inverters. There is not sufficient electrical power to recharge the batteries in such areas. People benefit a lot from grid-tie inverters as they use the sustainable solar energy for the power generations.
The grid-tie inverters are a reliable source of backup power. The conversion of DC into AC protects the electrical appliances and prevents any electrical mishap. It shuts down in the case of the power grid failure. The workers who try to fix the power grid thus, remain protected.
- Easy Installation
The off-grid inverters require the batteries for the installation; hence the installation process is complicated. On the other hand, the grid-tie inverters are very easy to install as these do not have the batteries. The solar panels are easy to install, moreover, all the panels do not require to be installed right away. You can install single or more panels in accordance with your power consumption needs. Some people even install the inverters for the main purpose of reducing the electricity bills. As they gather the financial resources they install the remaining panels.
For installing a household solar grid-tie inverter the given components are required.
1) Appliances that use the alternating current for firing up
2) Board distribution connection for connecting point of the grid
3) The meters for both the imports and exports. These meters record the energy consumed and generated.
4) A high-quality grid-tie inverter. It will convert the direct current into the alternating current.
5) Junction box for allowing the termination of the panels
6) Solar Panels for generating the specific current and the voltage. The wired modules can be used for this purpose.
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The direct current produced by the solar panels gets transferred into the junction box. At this box, the panels are connected. This direct current is fed into the grid-tie inverter by a cable that connects the junction box with the inverter. The current gets converted into the AC by the inverter and transferred to the appliances. There is a fuse that allows the output current to reach the main distribution.
There is no doubt in the fact that grid-tie inverters are the future of the inverters. More and more people are adopting the grid-tie systems to avail the numerous advantages it offers. For the installation of a solar grid-tie inverter, a customer gets 30% subsidy. The cost of a 1.5 KW inverter is around 54,000 INR. Taking into the consideration, the tax credits and reliability, the ROI generally comes down to 10 to 12 years for the residential use. For the commercial use, the number of years will go down even further as there is more usage and thus, more savings on the power bills.
There is no dubiety in the fact that installing a solar grid-tie inverter is a smart choice.
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