DC solar power system Stabilize the effect of voltage
Use the instructions for DC solar power generation systems
Solar energy technology support: battery (also known as the battery) is an important device of DC solar power system, its main function is to instantly send solar energy generated in the battery, for use in electrical equipment, battery storage power and Stabilize the effect of voltage.
The main technical parameters of the battery are voltage and capacity. Voltage is the rated voltage of the battery that is the normal working voltage, generally 3V, 6V, 12V, 24V, 36V and so on. Capacity is the ability of the battery to store electricity, generally common 4AH, 6AH, 12AH, 20AH, 40AH, 60AH, 120AH and so on. If the 40AH battery, for example, that the current to the battery to charge 4A, 10 hours can be filled; if the 1A current charge, you need 40 hours to fill. The same is true when the discharge. Under normal circumstances, the battery charge and discharge time, according to 10 hours charge and discharge rate is appropriate. When the battery is charged with a solar cell, the voltage of the solar cell should exceed 20% -30% of the working voltage of the battery in order to ensure that the battery is charged normally. Such as to charge 6V battery need to use 8-9V solar cells, 12V battery charging need to use 15-18V solar cells.
As for the use of solar panels to charge the battery, how to match as well, mainly to see your actual needs. If it is for ordinary families, that day, with solar energy to the battery charging, lighting at night. Such as: battery selection 40AH battery, solar cell selection 305 * 457MM (15V400MA) 10 parallel, the voltage is 15V, current 4A, then 10 hours can be filled with the battery. If you use 20 parallel, with 5 hours can be filled. The same 400 * 200MM (10W) monocrystalline silicon solar panels, with 5 in parallel, the voltage is 18V, current is about 4A, 10 hours can be filled with 40AH battery.
Solar battery 305 * 457MM (15V400MA), power of about 5 watts, power = voltage * current (P = UI), 10 parallel to 50 watts, 10 hours during the day charge charge of 500 watts. At night for 100-watt bulbs, electricity 5 hours, that is, when the electricity consumption of 500 watts. If you use 200 watts of electrical appliances, you can only work for 2.5 hours.
When charging the battery with a solar cell, it is best to add a rectifier diode to the charging circuit to ensure that the battery will not be discharged through the solar panel in the evening. If the installation of the charge, discharge automatic protection better, you can ensure that the battery will not overcharge or over discharge, to extend the life of the battery is good, the battery life is generally 1-2 years.
To use 220V appliances, use a dedicated inverter power supply.