The top manufacturers are offering a compact, sleek design, easy to install solar inverters loaded with advanced features like real-time monitoring of the performance of the solar power system remotely.
Also, they are implementing new technologies to achieve the highest efficiencies, making them the best on-grid solar inverters for homes, available in the market.
The solar inverter is the brain and hence the most sophisticated part of the grid-tied solar power system.
The inverters are located outside the house along with the solar power system, experiencing harsh weather conditions like wind, heat, rain, the humidity making them more susceptible to failures.
The malfunctioning of the inverter impacts the working of other parts and may result in a complete shut-down of the system, affecting the overall profitability of the solar power system.
To prevent this situation, it is advisable to place your inverter under the shed outside your house.
By looking at the importance of its functionality, it is better to spend extra bucks and have the best quality solar inverter for your solar power system.
Before moving ahead, let’s get the inverter basics clear.
Function of the Inverter
It is the interface between the solar panels and your electrical appliances. Its basic function is to invert or convert the direct current produced by the solar panels into alternating current to run our electrical devices.
“You know most of our electrical devices run on the alternating current”
Why alternating current?
Are really interested in knowing the difference?
Read: What type of current does your solar system produce?
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Now, we know the basic function of the inverter.
It is time to know different types of solar inverters:
Types of Inverter
First of all, it is important to know about the grid-tied solar power system.
It is the solar power system that is connected to the utility grid supply.
The benefit of this system is that you’ve 3 sources of supply:
There are basically 2 arrangements of connecting the output of the solar panels with the inverter:
In the first arrangement, all the solar panels are connected with the string and their collective DC output is fed as an input to the inverter and in return, this inverter converts this DC into AC current.
Inverters that support this type of arrangement are called string inverters.
This best for those who are looking for cost-effective solutions and have ample shade-free areas.
While in the second case,
when a small inverter is attached at the back of every solar panel in the string, and the output of each panel is combined and fed to the electrical appliances.
These small inverters are called micro inverters.
The biggest benefit of this kind of arrangement is that even if any one of the solar panels is not performing well due to shading or any other reasons the output of the other performing panels is not affected as it is in the case of string inverters.
Another category is hybrid inverters in which the solar inverter and the battery are integrated into one large unit so that they can provide a basic level of backup in case of a complete blackout.
The last category is power optimizers,
Power optimizers are like DC to DC converters, taking DC power (product of voltage and current which the panel is producing) as input from the solar panels and converting it to different voltage and current that is best suited to the central/string inverter.
These power optimizers are installed on each panel. But they do not convert dc into ac at the individual panel level as it happens in the case of microinverters.
This process makes the string inverter to get a smooth DC energy as an input, helping it to convert into AC energy more effectively.
However, power optimizers are less costly than the micro-inverters.
If you choose to install panels with micro-inverters then you need one micro-inverter for each panel whereas in the case of power-optimizers the central inverter remains the same, thereby it is cost-effective than the micro-inverters.
But on the other hand, the Micro-inverters are generally warranted for 25 years but the central inverter with which the power optimizers are connected comes with a warranty of 10-12 years.
Therefore, the increase in the cost of the micro-inverters is compensated by the extended warranty of 25 years.
What are the Best on-grid solar inverters?
1) Fronius Primo: String Inverter
This compact single-phase inverter is ideal for residential solar applications. with a power range of 3.0 kW to 8.2 kW, achieving maximum efficiency of 97.9%.
2) SMA Sunny Boy: String Inverter
This German product is going to give you 100% ease and comfort with its maximum efficiency of 97%.
3) Solar Edge HD-wave technology: Power optimizers
These are not conventional string inverters rather use power optimizers to separately handle the maximum power of the individual panel.
In this way in case anyone or two panels in the string are shaded or are not performing well due to other reasons, the output of the other panels will not be affected as they have their own power optimizers connected to them.
The central single-phase inverter is only responsible for the inversion of DC to AC.
The fixed string voltage resulted in high efficiency up to 99%
4) Enphase IQ7+: Micro Inverter
These IQ7 microinverters are based on 7th generation platform for achieving the highest efficiency.
5) (ABB) FIMER UNO DM Tl Plus Q: String Inverter
Fimer offers wide range of solar inverters meeting any type of solar energy energy needs.
It offers string inverters from small to large solar PV applications with a range of 1.2 kW to 175 kW.
However, for residential purposes a single phase solar inverter with range of 3.3 to 5 kW is suitable for the homeowners.
The above solar inverters are rated on the following parameters:
There is no number 1 or number 2 but all of these solar inverters are the best in their categories.
The selection of any type of inverter mainly depends on:
Please let me know in the comment section below which one you are going to choose and why?