Hi, I am currently working on a photovoltaic system. May I know is there any device that is suitable to control the current supply to my load.
Let say I am testing my load with 2 A, 3 A and 4 A, what is the device that I can use to adjust the current supply from the solar panel to this load?
Thank you.
Hi. you can use a charge controller device for it, if i understand your purpose correctly.
The resistance of a circuit always determines the current for a given voltage. As the voltage you can achieve is fixed you can devide the maximum voltage /R (resistance) achieving the max. Current.
For what application do you need a constant current?
The panel will not supply a constant current, it depends on the solar radiation.
Hello Looi,
A DC/DC converter with current limit setting will do the job.
If the load voltage is lower than that of the PV output, use a step-down (buck) DC/DC.
If the load voltage is higher that that of the PV output, use a step-up (boost) DC/DC.
If the load is unknown, use a buck-boost DC/DC which can handle both lower and higher load voltages than that of the PV output.
To do this with a converter, it´s necessary to put batteries to guarantee the necessary energy when the photovoltaic panels don't receive enough solar radiation to produce the intensity that is needed
Dear Looi,
welcome,
If you want to control the current to your load, then the simplest method is to use a variable resistance as proposed by some colleagues before me.
But may be the best solution is to control the current using MOSFET transistor which is connected in series with the load. The current through the load and the transistor can be controlled by the gate voltage of the MOSFET. One has to pay attention to the proper rating of the required transistor.
Best wishes
microinverters, optimizers ad TIGO, or develop a mppt for your specific regulator need.
Dear respected Looi Kar Kin,
to control the current supply from the solar panel to the solar battery solar charge controller is suitable. To control the amount of current supply to a load a variable resistor is used.
Best regards.
Kifilideen.
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