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How to choose solar panels
- Mar 20, 2018 -

How to choose solar panels


People are now advocating energy conservation, environmental protection, and low carbon. Solar energy has made great contributions to energy conservation, environmental protection, and low carbon.


The universality of solar energy, the area of sunlight is scattered in most of the corners of the earth, only the difference in light energy caused by the difference in the angle of incidence, but at least will not be monopolized by a few countries or regions, resulting in unnecessary energy crisis. The permanence of solar energy, the energy of the sun is extremely large, scientists have calculated at least six million years of time limit for humans, this time can be described as infinite. The pollution-free nature of solar energy is currently the most used mineral energy. The problem of breeding is nothing more than the treatment of waste. The object is immortal. The more energy is depleted, the more pollution is generated. Solar energy is less dangerous and polluting. Under the principle of peaceful coexistence between humans and nature, the use of solar energy is the most harmless to the atmosphere, and if the equipment is used properly, the cost required for installation is minimal, and at least ten seventeen kilowatts of electricity can be produced each year. Harmful gases and waste residues from coal, petroleum, and other fossil fuels, and use of solar energy will not cause pollution and will not emit any substances that have adverse environmental impacts. It is a clean energy source. Of course, after extensive use of solar energy, due to the full use of solar energy, the temperature of the environment will rise slightly, but this temperature rise will not cause adverse effects on the environment.


Solar energy is the most abundant source of energy that humans can use. It is estimated that during the long 1.1 billion years of the past, the sun has consumed only 2% of its own energy. In the next few billion years, the sun will not change significantly. Therefore, the sun can be used as a permanent energy source for humans. Inexhaustible, inexhaustible. It radiates 15 minutes of energy to the ground and is enough for the whole world to use for a year. Solar energy security. There is a risk of nuclear leakage from nuclear power generation. Once a nuclear leak occurs, it will cause a great ecological crisis. This is absolutely not true for solar energy. It is very reliable.


The solar power system consists of a solar battery, a solar controller, and a battery (group). If the output power is AC 220V or 110V, you also need to configure the inverter. The role of each part is:


1. Solar panels: Solar panels are the core part of solar power systems and the highest value in solar power systems. Its role is to convert solar energy into electrical energy, or send it to a storage battery, or push a load to work. The quality and cost of solar panels will directly determine the quality and cost of the entire system.


2. Solar Controller: The role of the solar controller is to control the working status of the entire system, and play the role of overcharge protection and over-discharge protection of the battery. In areas with large temperature differences, qualified controllers should also have temperature compensation. Other additional functions such as light-controlled switches and time-controlled switches should be optional for the controller.


3. The Battery: Generally lead-acid battery, generally 12V and 24V these two, small micro-systems, but also available nickel-metal hydride batteries, nickel-cadmium batteries or lithium batteries. Its role is to store the electric energy emitted by the solar panel when there is light, and release it when needed.


4. Inverters: In many cases, AC220V, AC110V AC power supplies are required. Because the direct output of solar energy is generally DC12V, DC24V, DC48V. In order to supply electric energy to AC220V electric appliances, it is necessary to convert the DC electric energy generated by the solar power generation system into AC electric energy, so it is necessary to use a DC-AC inverter. In some cases, when using multiple voltage loads, DC-DC inverters are also used, such as converting 24VDC power into 5VDC power (note that this is not a simple step-down).