How to install and maintain your PV system?

home PV system
home PV system

How do install a home PV system? This is a question always asked and concerned about by those who wish to go solar. But others think this is not a big issue because installers will help you solve the problem. My answer is you had better learn something about it.

First, you should make your self clear that your community permits this. I have heard that some communities don’t approve this. So, making sure of this will save lots of your energy.

Second, before the solar panels are transported to your home, you need a slant rooftop with an area of at least 30 square meters. The rooftop had better be a slope with a certain angle, for this is the best for absorbing sunlight. If you don’t have such a rooftop but only a flat one, you need racks to support your solar panels with such an angle. Or if you don’t think installing panels on your rooftop is possible, you can also ask the installer to install them on the ground to which you own the property right.

Third, when your panels arrive, you may pick out a spot on your rooftop or ground to install them properly. No matter whether you install them on your roof or on the ground, you should make sure they face south, east or west, so that they can catch the most sunlight and generate the most direct current.

Fourth, install some racks on your roof or on the ground to fasten solar panels. After this process you can install the panels on them in the angles that suit your local latitude condition the most.

After the installation, you may connect your panels to the solar inverter or microinverters for the sake of converting direct current into alternating current. Finally, connect your whole PV system to the local utility grid. If you are intended to do so, you may also need to install the prepared batteries into the system to satisfy the constant power supply for your house. Some who have enough financial support can connect to the grid and install batteries.

Once the installation job is over, you must be considering how to maintain it. To be honest, such a system doesn’t need too much of your time for its maintenance. You only need to make sure the panels are always clean, without anything like bird droppings, dust or snow on them. Three or four times of cleaning in a year is enough, unless you meet special extreme conditions. In addition, make sure your solar inverters are free from dust and moisture.

The Solar Inverters of Omnik New Energy

Omnik is a Suzhou-based company specializing in manufacturing solar inverters which include single phase, three phase, hybrid and micro inverters. Besides, the new energy company also produces monitoring devices, solar software and solar accessories. In Suzhou, China it is also able to install solar PV systems for residential and commercial buildings.

Single Phase Inverters
Omnik’s single phase inverters are highly efficient with their highest conversion efficiency reaching up to 97.8% and their highest MPPT efficiency reaching up to 99.9%. Their AC power ranges are from 1 kW to 5 kW. The outstanding feature of these products is all these inverters are transformerless. In addition, among them is one series designed mainly for the Japanese market.

Three Phase Inverters
These three phase inverters are mainly designed and produced for residential and large-scale commercial solar power plants. Their highest efficiency can reach up to 98.2% and their highest MPPT rate can reach up to 99.9%. Apart from these two features, these solar products are equipped with the IP65 technology which is water- and dust-proof. Also, the built-in Wi-Fi technology is also available.

Hybrid Inverters
These hybrid solar inverters combine the features of single phase and three phase inverters. The amazing feature of them lie in that they can be used in a grid-tied or an off-grid solar PV system with their highest conversion efficiency being 98.3%. Their AC power ranges are from 3 kW to 5 kW. Each device is designed with the IP21 technology and is suitable for any kind of installation at home.

Micro inverters
Omnik’s micro solar inverters are specially made for home solar power systems. They have transformers and their AC power ranges are from 300W to 600W. Their highest efficiency is 96.5%. They are designed with the AC/DC high frequency isolation technology. At most, 15 of them can be connected in a parallel format to convert DC.

Its monitoring devices are used to monitor its inverters, and Wifi-Kit, GPRS-Kit and PMB are its three monitoring products. Its software products include solar design software and design PV mobile apps. By using some of the software, you will be able to view the electricity statistics of your solar power system with your smart phone or iPad. Its accessories include weather station, PV model and battery.

The PV power system and its working principle

omnik solar power system
omnik solar power system

What is a PV power system?
It is a system which consists of solar panels, power-charging and -discharging controllers, a solar inverter, a tester, and other computer and mobile electronic devices, storage batteries, and other assistant power geenration devices. It works to generate electricity by absorbing sunlight and converts it into home use electricity.

What are advantages of the system?
1.It doesn’t have moving components that often produce lots of noise. It is home-friendly.
2.It is environment-friendly and will never emit polluted air or water.
3.It doesn’t need a procedure which needs biofuels to power itself.
4.It is easy to repair and maintain, and so you don’t have to spend so much money on its repair and maintenance.
5.It is reliable and stable.
6.The solar panels all have a long lifespan and they often span up to 25 years.
7. You can easily expand your scale of power generation according to your individual demands.

Use of the PV power system
It is now a widely used system that can be generally divided into two types: stand alone and grid-tie power generation systems. So far, developed countries such as the UK and the US have begun to install the grid-tie power system in their cities. China and Japan are now following this fashion too. They are mainly building residential rooftop PV power systems and MW-level large-scale grid-tie power generation systems. It can be used in different areas, such as home, transport, communications, space and others.

Working principle
Although they have different sizes and forms, their working principle is the same. Generally speaking, it is a system that generates electricity from sunlight by its solar panels, and then charges the storage batteries through the control of the controller, or supplies the direct current load if the load requirement is satisfied. If there is no rich sunlight or if it is at night, controlled by a controller, electricity will be transmitted to the direct current load. If the electricity needs to be used in a house, the direct current must be converted by a solar inverter into alternating current.

What are grid-tie solar inverters?

grid tie inverter
grid tie inverter

Solar energy is now being used to generate electricity by numerous solar power plants scattered around the world. Solar inverters have been used to convert the direct current generated from sunlight into alternating current. Grid-tie and off-grid inverters are the two major types that are used, especially grid-tie inverters. But what are they?

Concept: Grid-tie inverters are those that turn direct current into alternating current and can synchronize to interface with a utility line. If direct current voltage is a little bit low, it will raise it by using its alternating current transformer, so as to get the standard alternating current voltage and frequency.

Requirements and features for each inverter:
1.Each inverter is required to have high efficiency.
2.Each inverter needs more reliability.
3.The direct current input voltage must be broad.
4.These inverters help each solar power system sell unused electricity to the utility grid.
5.They should be quickly disconnected from the utility grid when it is being fixed.
6.They don’t need storage batteries.

Transformer type: newer high-frequency transformer, conventional low-frequency transformer and transformerless solar inverters.

Inverter type:
Central inverters: They are often used in large-scale PV power plants (over 10kW). Their most prominent features are that each system has high power and low cost. However, they might be affected by the matching of PV modules and shading. If they are affected, the whole PV system’s efficiency and output will also be affected. Meanwhile, the reliability of the whole system is also affected by a PV unit team which doesn’t work well. The newest methods to solving this problem are two: adjusting it through space vector and developing new topography connections of the inverter.

String inverters: Based on the module concept, each PV string (1kW to 5kW) has MTTP at the direct current end and parallels and connects to the grid at the alternating current end. Lots of large-scale PV power plants use string inverters. Its features lie in that their efficiency won’t be affected by the module differences between strings and shading, and that this avoids the mismatches between PV modules’ best points and inverters. Therefore, more electricity can be generated. Today, transformerless string inverters are leaders among other kinds.

Multiple string inverters: These inverters can be installed in the PV power plants which have the capacity of thousands of MW. In addition, they have the features of central and string inverters. In these inverters, different single power peak value tracking and direct current to direct current converters are included. These direct currents are turned into alternating currents through a common direct to alternating inverter and connect to the utility grid. As the length of the direct current cable decreases, the shading between the strings and the losses caused by the distinctions between the strings will be reduced to the minimum amount.

Module inverters: They connect each module with a inverter. At the same time each module has a single maximum power peak value tracking. They are often installed in the power plants with the capacity from 50W to 400W. The total efficiency is lower than that of string inverters.

What factors make high efficiency PV inverters?

Omnik solar inverter
Omnik solar inverter

Before we discuss the factors that can make highly efficient PV inverters, let’s learn the definition of what the efficiency is at first. It refers to the rate that a PV inverter converts the direct current generated from sunlight into the alternating current which is used directly by each family. After making the definition clear, we can discuss the factors.

A PV inverter is a machine which produces heat while working. Usually a machine’s working efficiency reduces as its heat grows. Indeed this is the same for a PV inverter. From this perspective, we know if it can keep cool while working, they can work more efficiently. Out of this concern, the inverter with a cooling system inside has been invented and is being used. Omnik’s micro inverters are a typical example of this kind. At the same time, to make an efficient inverter work better, users can install it in the places of a house where sunlight cannot reach, as so to make it cool. In addition, voltage optimization and inverter load are aslo two important elements that influence the efficiency. The inverter load is the amount of power that the inverter is supplying compared to its rated power. The following picture shows how an inverter’s efficiency changes as its output power changes.

inverter-efficiency-curve
inverter-efficiency-curve

Today, the highest solar inverter technology originates from Europe, especially Germany. The most excellent technology it holds is the high frequency isolation technology, which can protect the inverter from damage and make it work more efficiently. Currently the highest solar inverter efficiency can reach up to 98.5%. The most efficient micro inverters (mainly used for residential solar PV systems) have the highest efficiency of 96% or so.

In the world there are numerous solar inverter manufacturers, and some of the big names are really producing high efficiency inverter products, including SMA (98.5%), SolarEdge (98%), Advanced Energy (98%), Kaco (98%) and Siemens (98%). In fact, there are also other highly efficient products including Omnik (98.2%) that product excellent inverter products. To learn more, please check this information and clear your confused mind.

Warning
Some inverters have a high efficiency when they output in highest power, but have low efficiency when they output in lowest power; and some even have an average conversion efficiency when they output from low power to high power. Therefore, when choosing solar inverters, you need to consider whether the solar panels’ output characteristics match the features of the solar inverters or not.

Cut Down Solar Prices, You Will Win

solarpices

Solar energy will become the most appreciated way out for every one of us as it is used to generate power to replace biofuels which most countries in the world are still using for power generation. However, there is a loophole in developing this new business. So, what’s that? Obviously, it is the solar prices.

In spite of solar energy’s green way of generating power, people today or in the future must care about more of their own profits and well beings than other factors which even a country like the US or China is trying to promote. From this way to think further, a solar material manufacturer should get an idea: price must be the topmost concern.

However, to create a PV solar system is not only to produce some solar panels, racks or wires, but to manufacture high quality PV solar inverters. You see, they are key in converting the direct current generated from sunlight into alternating current that each family uses everyday. As a solar material manufacturer, what you need to do is obvious: cut your these materials’ prices. In a market, businesspeople in the field always fiercely compete with one another on price, and many of them compete even in vicious ways. But in the solar energy industry, you cannot do it like that.

Keeping an eye on the global solar market, one should know that solar panels’ prices are decreasing rapidly compared with the past years due to large scales of production and shipments. This is a good phenomenon for consumers, while it may not be so nice for a manufacturer. Now either the US or China is offering incentives to this industry, but this will never last long. Helped by this opportunity, a producer needs to do more things. Cut down the prices of your solar commodities, trying to meet the demands of different customers.

According to my personal knowledge of this industry, the profits in solar materials are not bad. So, how to persuade customers to buy your products not others? Yes, one should design and produce excellent solar products, I think, especially solar inverters, for they are the soul in a solar PV system. A manufacturer needs money to sustain his factory or company, so he needs profits. How to get them? You don’t have to charge labor in installing the system, and you even don’t have to charge so much the solar panels installed on a rooftop. So, charge what? Charge the inverters and their accessories!

However, probably developed counties and developing counties are different in labor payment. In the US, the UK, Australia and the Netherlands, labor price must be very high. In China or India, labor will not be that expensive. Therefore, take different measures to deal with different special problems. For one company in a developed country, large scales of production and shipment might be more favorable than lowering labor payment.

PV Inverters: Omniksol-1k/1.5k/2k-TL2

Omnik Solar Inverter

 

PV inverters are various, while those that are extremely excellent might not be that many. To meet the standards of those who want outstanding PV inverter products, today I introduce one brand that may meet your needs or help you decide which way you need to take. Now, follow me and check why.

The inverters I introduce today are the ones from the Omniksol-1k/1.5k/2k-TL2. What does the Omniksol mean? It means Omnik and solar. Omnik is a PV inverter brand specializing in developing, designing, manufacturing and selling PV products, and its technology originates from Germany. Solar means something that is related to sunlight or sun power. In the PV industry it is often combined with other words such as inverter, panel, energy and others. Once they are combined, they stand for different and unique meanings. K stands for KW, and TL is a terminology for this product and it is “transformless” for short.

Having understood the basic information of these types of items, you are now heading for the specific functions and impressive characteristics of them.

The topmost element a professional PV inverter buyer always requires is the conversion efficiency of the special product. To make you feel satisfied while viewing the brand the first time, I can tell you that these products’ conversion efficiency can reach up to 97.5%. This rate stands out among the most efficient solar inverter (the other name of PV inverter) products in the world today. You may still feel doubtful about this, but you can check information online before you judge what I am telling you here is truth or false. Along with this function, they have the MPPT (Maximum Power Point Tracking) function, and its efficiency can reach up to 99.9%.

Do you feel impressive or not? If you do, you may follow me to learn more features from the paragraphs below.

Inside each of these devices there is a Wi-Fi card, which serves to send the working information of the inverter to the outside. The thing I need to highlight here is this is the technology invented by Omnik in the world. Also, each device is equipped with the PMB (Picture Motion Browser) function, which can store all the important data that the sensor has. And each of these products has RS485, RS232, USB and the standard Ethernet port. By downloading the free controlling software from Omink’s official website, the user can monitor his or her solar energy system’s electricity output and the public grid any time he or she wants. Besides, you can also choose to install the Wi-Fi kit or the GPRS kit.

Apart from these amazing functions described in the two paragraphs above, you will also realize that you still need at least one quality from this product. What is it? It is its protection of the inside components of each inverter.

No doubt, nearly every excellent product has brilliant production of its components, so do these PV items. But they are different largely from others, for they have internalized IP65 protection, which guarantees each inverter can be installed indoors or outdoors. No matter what weather conditions, the device will seldom get affected. Even in a stormy night, you don’t have to worry about how the small device can go through such terrible weather. This PV thing is small, and so it is easy to be installed in your house.

In fact, some picky customers might need to customize their products as they always do on the internet. For this concern, the product team is working for you. To well serve each customer, the team can design and make any kind of solar PV inverter with power ranging from 1,000W to 2000W in the Omniksol-2k-TL series. However, sometimes customers may not be so accurate about which size they really need. Thus, the team can offer you reasonable suggestions so that your purchase will be so suitable for you.

Finally, if you decide to buy one of these inverters, you have its well-designed services. These products are designed of dear customers, and so if any malfunctions occur now or later, your given software will automatically send back these information to the team for repairing. If the solar equipment itself is in mess and cannot work after repairing, the team will bring another to you. And, some customers may ask: “What warranty can the brand provide for you?” No worry! Its warranty can last 5 to 25 years for different types of its products.