Advantages of solar power systems:
1. Safe and reliable, no noise, no radiation, no need to consume fuel, no mechanical rotating parts, low failure rate and long service life;
2, environmentally friendly, not limited by geographical location, short construction period, random size, easy assembly and disassembly, easy to move;
3, ready-to-use, disassembly and assembly, low cost, can be easily combined with buildings, without the need to pre-embed high transmission lines, can avoid the damage to vegetation and the environment and engineering costs when laying cables over long distances;
4, voltage stability, high power quality, widely used in a variety of electrical equipment, very suitable for rural, farm, mountain, island, highway and other remote places of electricity, is also an excellent emergency backup power.
The composition of the solar power system
Solar photovoltaic power systems are mainly composed of solar panels, solar controllers, maintenance-free lead-acid batteries and AC-DC inverters. The core components are solar panels and controllers. The role of each component in the system is:
1. Solar panels: Solar panels are a core part of solar power systems and the most valuable part of solar power systems. Its role is to convert the solar radiation capacity into electrical energy, or send it to the battery for storage, or to drive the load.
2. Solar controller: The function of the solar controller is to control the working state of the whole system and to protect the battery from over-charge protection and over-discharge protection. In places with large temperature differences, qualified controllers should also have temperature compensation. Other additional functions such as light control switches and time control switches should be optional for the controller;
3. Battery: Generally, it is a lead-acid battery. In a small and micro system, a nickel-hydrogen battery, a nickel-cadmium battery or a lithium battery can also be used. Its function is to store the energy generated by the solar panel when there is light, and then release it when needed.
4. Inverter: The direct output of solar energy is generally 12VDC, 24VDC, 48VDC etc. In order to supply electrical energy to 220 VAC appliances, it is necessary to convert the DC power generated by the solar power generation system into AC power, so a DC-AC inverter is required.
Factors to be considered in the design of solar power systems
1. Where is the solar power system used? What is the solar radiation situation in the area?
2. What is the load power of the system?
3. What is the output voltage of the system, DC or AC?
4. How many hours does the system need to work every day?
5. How many days does the system need to be powered continuously if it encounters rainy weather without sunlight?
6, the load situation, pure resistance, capacitive or inductive, how much starting current?
7. The number of system requirements.