Introduction of solar energy system composition
Solar power system consists of solar battery, solar controller, battery (group) composition. If the output power is AC 220V or 110V, also need to configure the inverter.
Classification of solar panels
Crystal silicon panels: polycrystalline silicon solar cells, monocrystalline silicon solar cells.
Amorphous silicon solar panels: thin film solar cells, organic solar cells.
Chemical Dye panels: Dye-sensitized solar cells.
(1) monocrystalline silicon solar cells
The photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, and the highest is 24%. This is the highest photoelectric conversion efficiency among all kinds of solar cells, but the cost of production is so large that it can not be used universally. As monocrystalline silicon is generally tempered glass and waterproof resin for packaging, so its durable, the service life of up to 15 years, up to 25 years.
(2) polycrystalline silicon solar cells
Polycrystalline silicon solar cell production process and monocrystalline silicon solar cells almost, but the polysilicon solar cell photoelectric conversion efficiency will have to reduce a lot of its photoelectric conversion efficiency of about 12%. From the production cost terms, than the monocrystalline silicon solar cells to be cheaper, material manufacturing is simple, saving power consumption, the total cost of production is low, so a lot of development. In addition, the service life of polycrystalline silicon solar cells is shorter than monocrystalline silicon solar cells. From the performance and price ratio, monocrystalline silicon solar cell is also slightly better.
(3) amorphous silicon solar cells
Amorphous silicon solar cell is a new type of thin film solar cell appeared in 1976, which is completely different from monocrystalline silicon and polycrystalline silicon solar cell production process, the process is greatly simplified, silicon material consumption is very low, power consumption is lower, its main The advantage is that in low light conditions can generate electricity. However, the main problem of amorphous silicon solar cells is the photoelectric conversion efficiency is low, the international advanced level of about 10%, and not stable, with the passage of time, the conversion efficiency of attenuation.
Solar controller is a dedicated processor CPU, electronic components, monitors, switching power tube and other components.
1, the use of a microcontroller and special software to achieve the intelligent control;
2, the use of battery discharge rate characteristics of the correct discharge control. Discharge termination voltage is controlled by the discharge rate curve control point, eliminating the simple voltage control over-discharge inaccuracy, consistent with the inherent characteristics of the battery, that is, different discharge rate with different termination voltage.
3, with overcharge, over discharge, electronic short circuit, overload protection, anti-reverse protection, and other unique automatic control; above protection does not damage any parts, do not burn insurance;
4, the use of tandem PWM charging the main circuit, so that the charging circuit voltage loss than the use of diode charging circuit to reduce nearly half of the charge efficiency of 3% -6% higher than non-PWM, an increase of electricity time; Charge, the normal direct charge, float automatic control system so that by the longer life; at the same time with high-precision temperature compensation;
5, intuitive LED LED indicates the current state of the battery, allowing users to understand the use of the situation;
6, all the control of all industrial-grade chip (only with industrial grade I controller), in cold, hot, humid environment running freely. At the same time using the crystal timing control, timing control accuracy.
7, the elimination of the potentiometer to adjust the control set point, and the use of the E side memory to record the work of the control point, so that set the digital, eliminating the potential for vibration potentiometer drift, drift so that the control point error reduction Accuracy, Sexual factors;
8, the use of a digital LED display and settings, one-click operation to complete all settings, the use of extremely convenient and intuitive role is to control the working status of the entire system, and the battery played overcharge protection, over discharge protection. In the larger temperature difference, the qualified controller should also have the function of temperature compensation. Other additional functions such as light control switch, time control switch should be optional controller;
The role of the battery in a light when the solar panels will be issued by the power stored up to the time needed to release. Solar battery is a 'battery' in the application of solar photovoltaic power generation, the use of lead-acid maintenance-free batteries, ordinary lead-acid batteries, gel batteries and alkaline nickel-cadmium batteries four. The widely used solar batteries are mainly: lead-acid maintenance-free batteries and gel batteries, these two types of batteries, because of its inherent "free" maintenance features and less polluting the environment, it is suitable for reliable performance of solar power Systems, especially unattended workstations.
In order to provide electrical power to 220VAC, the need to convert solar power generated by solar power systems into AC power, so the need to use DC-AC inverter.
Inverter is divided into off-grid inverter and grid-connected inverter.