Assume we have a 12v 100 watt solar panel and it ll give an output between 18v 21v depending upon manufactures but batteries are rated for 12v nominal voltage.
Arduino solar panel charge controller.
The 5v regulator is build into the unit i used and if not use a separate 5v supply.
It is used to maintain the proper charging voltage on the batteries so as the input voltage from the solar panel rises the charge controller regulates it preventing any over charging.
Arduino solar charge controller version 2 0 step 1.
The system is dc.
You can follow all the steps on his page but first take a look at the video.
Main functions of solar charge controller.
Arduino pwm solar charge controller v 2 02.
Above is a generic arduino nano but the code will work on any arduino style microcontroller.
The output voltage of the acs712 is 2 5v with no input while the spec sheet specifies 66 to 185 mv a output sensitivity.
Arduino regularly measures lead acid battery voltage and according to detected value switches the mosfet on to charge battery from solar panel and switches mosfet off when the battery is full.
For example you bought a new solar panel from the market which puts out 7 amps.
That 66 watts is not going anywhere but it s due to the poor match of the solar output current and battery.
The charge controller is designed by taking.
If you are planning to install an off grid solar system with a battery bank you ll need a solar charge controller.
So everythong works with dc and i do not have any inverters.
On the solar charge controller i can turn the load power on or off via button.
Parts and tools required.
Charge regulator with power box connections to regulator inside the box.
This design is suitable for a 50w solar panel to charge a commonly used 12v lead acid battery.
Our solar panels are dumb and not smart enough to understand the battery conditions.
Solar panel battery charge controller using arduino pictures of power box and arduino solar charge regulator.
One can easily add the ideas from that project to this one.
Solar charge controller has connectors and for panel connectors and for battery and connectors and for attaching load relays sensors motor drivers.
The heart of the charge controller is arduino nano board.
How the charge controller works.
7 amps times 12 volts 84w p v i you lost over 66 watts but you paid for 150 watts.
Under charge the setting of a battery is configured to 12 volts.
This is a simplified version of my solar panel battery charge controller using arduino.
Now a days the most advance solar charge controller available in the market is maximum power point tracking mppt the mppt controller is more sophisticated and more expensive it has several advantages over the earlier charge controller it is 30 to 40 more efficient at low temperature but making a mppt charge controller is little.
It works on the principle of pwm which improves efficiency of the solar pv systems.
You can also use other arduino board like pro mini micro and uno.
