Buying a solar system has a lot of excitement, but do not forget to get confused with some exaggerated ads and wrong information. Complete assurances and diligent search and avoidance of hasty selection are important points that will make your investment on these systems not only without fail and financial losses but long-term profitability for the investor. So, pay attention to the following points before purchasing your solar system:
1 Pay attention to experiences of some owners of the solar system
Always ask the people who used these systems before. They usually teach you important things because they have experience in using these systems. The negative experiences and problems they have in using these systems will make you adopt a new approach and not experience the other problems.
2 Product warranty period
The use of branded and more reliable solar panels is always the first step in the successful installation of these systems. Reputable manufacturers of solar panels are able to service the buyer for at least 25 years by offering valid warranties, and some companies guarantee their product for up to 30 years. Therefore, before purchasing solar panels, you need to ensure the full warranty of that product.
3 Having a realistic view of prices
Knowing the point is not that the lower the cost of your system will certainly affect the quality of it. The low price tag represents a low quality system and low quality of your investment system. Many solar companies reduce the quality of the system to boost their business, resulting in a significant reduction in prices, which will result in a low cost and reduced production for investors over the years.
4 Notify about the solar panel’s certifications and standards
There are various standards for determining the quality of solar panels worldwide, which are given to panels manufacturers after complex testing processes in advanced laboratories. Receiving or not receiving these standards can determine the quality of solar panels, and the buyer, knowing these standards, can better decide if the panel is of high quality. Some of these standards are: TUV, IEC and ISO, Salt Mist resistance, Ammonia-Free Standards (NH3 free) and a number of other standards. Each of these standards represents the type of test on Each panel is.
For example: The IEC61215 standard covers information about parameters that have a natural effect on the lifetime of the panels. These include:
A: ultraviolet rays of the sun
B: Testing at different temperatures such as cold temperature and hot temperature as well as humidity
C: Tolerable mechanical load of the panel includes hail, wind power, wind pressure, snow weight and, in general, the natural shields that the panels can withstand.
In this standard, the panels will tolerate a minimum pressure of 5400 Pa to achieve this standard.
5 Select the type of solar panel technology
To buy a solar panel we need to know what kind of panel we want? Poly crystal or monocrystal panels?
The comparison of the differences between these two panels is described in detail in this section.
Usually people who have less available space to build a power plant use monocrystal panels because they have the same power as polycrystalline panels, but they produce less space. But people who have more space available usually use polycrystalline panels because their prices are lower than monocrystal panels.
6 Structure or Structure Solar System
There are several types of panel structures that are ground-mounting, roof-mounting, facade mounting, and car-park mounting structures.
These structures should be made of aluminum or hot galvanized sheets with reliable wind resistant standards and can withstand winds of 120 km / h. Also, welding should not be used in any way, and all fittings should be bolted and sealed.
7 Use a suitable inverter with high efficiency
As you know, the solar inverter is part of a solar system between solar panels and consumers and converts DC power into AC power. When buying an inverter, you should pay attention to the brand and its standards, preferably avoiding anonymous and less-known inverters, causing system losses. German SMA inverters, KACO Germany, Fronius Austria are known as high quality inverters in the world and available in Iran.
8 Use protective equipments in the system
Unfortunately, many solar system engineers do not use protective equipment such as over-voltage and short-circuit protection equipment, which is because of lowering the cost of the protective equipment, reducing the overall system cost. To attract the customer. The use of protective devices such as lightning strikes to maintain the health of the system is imperative for all solar designers and contractors to prevent the destruction of the entire system in the event of a collision or other unwanted incident.
9 Get price quotes from different companies
When purchasing solar equipment, ask for prices from various companies. This will let you know about a wide range of prices and make a better decision to purchase the system, but pay attention to the prices offered to the items mentioned above, such as compliance with the standards and quality of equipment.
10 Avoid companies and individuals who insist on selling their product
As a final point to be noted, “a good product is always good.” It is doubtful whether it will be sold today or tomorrow, but that the seller wants to sell his products today for some reason. Unfortunately, some companies restrict them with policy of putting pressure on the customer and impose time constraints on their customer’s decisions, and sell their products to that client.
Note that as you complete your research to use these systems and increase your queries, it will make the system safer, more reliable and more lifelong.