The solar photovoltaic power generation system project is divided into: off-grid photovoltaic power generation system and grid-connected photovoltaic power generation system according to the operation mode. The off-grid photovoltaic system consists of a panel, a controller, a battery, and an inverter. If the output power is AC 220v or 110v, the PV inverter must also be configured. The role of each part is:
(1) Solar panel: The battery panel is the core part of the solar power generation system. The solar cell is a device that converts the solar radiation from the semiconductor material into electrical energy by using the principle of photoelectric conversion. This photoelectric conversion process is usually called “photovoltaic”. Hit the effect”, so solar cells are also known as “photovoltaic cells”. Its role is to convert the solar radiation capacity into electrical energy, send it to the battery for storage, or work with AC and DC loads.
(2) Controller: The function of the PV 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 microsystem, a nickel-hydrogen battery, a nickel-cadmium battery or a lithium battery can also be used. In the future, lithium iron phosphate batteries can be used, which are currently costly. Its function is to store the electric energy generated by the solar panel when there is light, and then convert it into AC power through the inverter when needed, or directly supply power to the DC load through the controller.
(4) Inverter: After the solar panel is connected to the controller, the direct output is generally 12VDC, 24VDC, 48VDC. In order to be able to supply 110VAC/220VAC electrical appliances, it is necessary to convert the DC power generated by the solar power generation system into AC power, so a DC-AC photovoltaic inverter is required.
Add: Rm. 103, Bldg. 18.No. 99, Gangtian Road