Solar cells, also known as "solar chips" or "photocells", are photoelectric semiconductor sheets that use sunlight to directly generate electricity. Single solar cells cannot be used directly as power sources. As a power source, a number of single solar cells must be connected in series, connected in parallel and tightly sealed into components.
Solar panels (also called solar cell modules) are assembled by multiple solar cells, which are the core part of the solar power system and the most important part of the solar power system.
The main purpose of solar panels:
User solar power（ITEHIL Foldable Solar Panel）
Traffic field（TEHIL Foldable Solar Panel more for motorhomes）
Home power（TEHIL Foldable Solar Panel）
Photovoltaic power station
And other areas including
ITEHIL Foldable Solar Panels Principle of Work
1. How do solar cells work?
The working principle of crystalline silicon n/p-type solar cells: When the p-type semiconductor and the n-type semiconductor are tightly combined into one piece, a p-n junction is formed at the interface of the two. When the photovoltaic cell is irradiated by sunlight, the accumulation of positive and negative charges is formed on both sides of the p-n junction, a photovoltaic voltage is generated, and a built-in electric field is formed. This is the "photovoltaic effect." Theoretically speaking, at this time, if electrodes are drawn on both sides of the built-in electric field and an appropriate load is connected, a current will be formed and power will be obtained from the load. Solar cell modules are solid-state devices that use the electronic properties of semiconductor materials to achieve PV conversion.
2. Basic composition of solar energy system
The solar power generation system is composed of solar cell components, solar controllers, and batteries (groups). If the output power is AC 220V or 110V, an inverter is also required.
3. The role of each part is:
Solar panels: The solar panels are the core part of the solar power system and the most valuable part of the solar power system. Its function is to convert the sun's radiant power into electric energy, or send it to the storage battery for storage, or drive the load to work.
Solar controller: The function of the solar controller is to control the working status of the entire system, and to protect the battery from overcharging and over-discharging. In places with large temperature differences, a qualified controller should also have the function of temperature compensation. Other additional functions such as light control switch and time control switch should be optional options of the controller.
Batteries: generally lead-acid batteries, nickel-metal hydride batteries, nickel-cadmium batteries or lithium batteries can also be used in small and micro systems. Its function is to store the electric energy generated by the solar panel when there is light, and then release it when needed.
Inverter: The direct output of solar energy is generally 12VDC, 18VDC (ITEHIL foldable solar panel), 24VDC, 48VDC. In order to provide electrical energy to 220VAC electrical appliances, the DC power generated by the solar power generation system needs to be converted into AC power, so a DC-AC inverter is required. Efficiency is one of the important criteria when purchasing an inverter. The higher the efficiency, the lower the power loss in the process of converting the direct current generated by the optoelectronic component into alternating current. It can be said that the quality of the inverter determines the efficiency of the power generation system, and it is the core of the solar power generation system.
TEHIL Foldable Solar Panel It is suitable for outdoor camping, power supply for electrical appliances in RVs, power supply for small electrical appliances in the home, and power supply for common electronic products such as mobile phones, computers and tablets.