Solar system for home
Solar system for home is quite feasible and profitable option for all those people who want to save money for future use. Solar system for home is of different capacities. We should know the dimensions of solar system. Then we can understand the power of a real power of solar system in Pakistani environment.
What are Dimensions and power of solar system?
The cost of a module depends on its power in direct proportion. However, the higher the unit power of the module, the lower its cost per watt will be. Therefore, if you need a certain power, then it is better to get it in big modules than small ones – it will be both cheaper and more reliable, since you will have fewer connections.
Cost Per Watt of Modules
Also, the cost per watt of modules with a standard voltage of 12 / 24V (the number of cells in a module is 36 or 72) is usually higher than with a non-standard number of cells in a module 48, 54 or 60. For the latter, when charging the batteries, a more expensive MPPT controller is needed.
How much power do you need for home?
Different types of solar cells used in a module also determine its size. Therefore, first calculate how much power you need to have your load, then see if you have enough space to accommodate so many modules. It may be necessary to select more expensive but high efficient modules in order to meet all your energy needs. By the way, do not forget that before designing a solar power supply system, you need to take all possible measures to save energy. You need to decide which items would be on solar system.
In this way you will be able to know the best solar system for home.
Peak power of different modules
You may see some typical types of solar cells for example, monocrystalline, polycrystalline, and amorphous, etc.
The main types of solar cells that are now massively sold in the market (the first 3 are silicon, which make up the major share of the market) and these are as follows:
These have the highest efficiency and satisfactory temperature coefficients.
Currently the most popular ones, as they have a lower cost per watt with approximately the same characteristics as monocrystalline. Recent improvements in branded polycrystalline module technology have resulted in great performance being even better than monocrystalline modules.
They use the smallest amount of silicon. They have approximately 2 times lower efficiency compared to crystalline modules. The advantages include a low temperature coefficient (i.e., when heated, the power of such modules decreases slightly) and greater sensitivity at low illumination.
CIGs are thin-film modules
A promising technology, but has not yet received mass distribution. Only a few manufacturers make the same modules, and their prices per watt are usually higher than for mass-produced crystalline silicon modules.
In recent years, solar modules have a lot of improvements, some solar systems for home are manufactured using new technologies: PERC, heterostructure, etc. They have greater efficiency and improved efficiency. While their cost exceeds the cost of standard crystalline modules with collector rails, the technology is improving and the market is gradually switching to new types of modules, the price of which is decreasing ultimately.
Which solar systems for home from the above work best?
There have been many myths and unsubstantiated claims lately that some of these module types perform better in certain conditions. Some claim that polycrystalline cells work better in low light and cloudy weather. Others claim the same, but for monocrystalline elements. We even heard a version that polycrystalline elements are better at transforming scattered light, because the crystals in them are “turned in different directions.”
Analysis of the results of testing hundreds of modules shows that each module has different capacity, either it is mono or poly, but one that is made with high quality.
Module testing results (which are closer to the actual operating conditions of the modules) show that somehow monocrystalline is better than some type of polycrystalline, and some class of polycrystalline is better than specific monocrystalline.
This fact is also confirmed by numerous results of comparisons on modules by end users – you can find both “evidence” of the advantages of mono over poly, and the advantages of poly over mono in our blog Zero Carbon.
However, most monocrystalline modules perform slightly better when heated – this is confirmed by the analysis of a large amount of test data on the power of solar modules from various manufacturers. To illustrate this fact, we compared the capacities of monocrystalline and polycrystalline modules.
Have Monocrystalline modules higher efficiency?
Monocrystalline modules usually have higher efficiency, i.e. you can get more power per unit area of the solar panel in bright sun. When you decide to have solar system at home then keep these elements in mind.
- Monocrystalline modules have less degradation over time.
- Monocrystalline modules are more expensive per watt.
The efficiency of standard modules is generally affected by the number of collector bars. The more there are, the better solar cells work. Solar cells with 3 bus-bars have been gradually replaced by 4 bus-bars, and more recent modules with 5BB are also introduced.
Solar system for home
Their efficiency is higher than that of elements with 3 or 4 tires, but in this case it is necessary to compare elements from manufacturers of the same level. Solar system for home can be a life changing decision for you. Because every month you will have relaxation in your utility bills.