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wind solar hybrid controller
SNEC
Off Grid Solar System 2017-06-14 11:20:08

When design for off grid solar system, we need to be flexible, do not rigidly adhere to a fixed formula. Off grid solar system can not solve all the electricity problems, encountered a number of consecutive rainy days, can only save electricity. Here are some questions about off grid solar system.


1. components, inverters, and battery need to match, any one can not be too large or too small. Some people often calculate the power consumption is too large, such as 1P air conditioning running 12 hours, counted as 10 degrees , 300W refrigerator running 24 hours, counted as 7.2 degrees electricity, resulting in battery capacity is too large, the system cost is too high. Design the battery capacity, the best 2 days to give full.


2. In the off grid solar system, output connection load, each inverter output voltage and current phase and amplitude are not the same. The inverter does not support the output parallel. So do not connect the inverter outputs together.


3. The load is the elevator and the like load can not be directly connected with the inverter output, because the elevator in the fall, the motor reverse, will produce a back EMF, into the inverter, the inverter is damaged. If it is necessary to use the off-grid system, it is recommended to add a frequency converter between the inverter and the elevator motor.


4. With the mains complementary input PV micro-network system, the insulation of components need absolutely. If the components to the ground leakage current, will spread to the electricity, causing the mains leakage switch trip.


5. The voltage of the component and the voltage of the battery need matched. PWM controller between the solar modules and the battery through an electronic switch connected to the middle. There is no inductance and other devices. The component voltage is 1.2-2.0 times the battery voltage. About 24V battery, the component input voltage between 30-50V. MPPT controller, the middle of a power switch and inductance and other circuits, the voltage is 1.2-3.5 times the battery voltage. If it is 24V battery, the component input voltage is between 30-90V.


6. The output power of the components and the controller power to be similar. Such as a 48V 30A controller, the output power of 1440VA, the components of the power should be around 1500W. When you select the controller, firstly look at the battery voltage, then the component power divided by the battery voltage, is the controller output current.


7. The battery charging current is generally between 0.1C to 0.2C, the maximum does not exceed 0.3C. Such as a lead-acid battery 12V200AH, charging current is generally between 20A to 40A, the maximum can not exceed 60A, battery discharge current is generally 0.2 C-0.5C, the maximum does not exceed 1C. One 12V200AH lead-acid battery, the maximum output power of not more than 2400W. About different manufacturers, have different models, the specific parameters are not the same.


JNGE POWER has always adhering technological innovation as the core of enterprise development. Our main products are pure sine wave inverter, pure sine wave DC-AC  hybrid inverter and controller all in one,solar charge controller, wind-solar hybrid controller, MPPT controller ect.



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