List of DIY Electronics Engineering Projects

SOLAR BATTERY CHARGER CIRCUIT WITH OVER CHARGE PROTECTION




As we all know that the ultimate source of energy is Sun. it is possible to generate current from sunlight using solar panels. These panels convert light energy into electrical energy. A solar panel consisting of a number of solar cells, which will produce a small amount of current but a bunch of solar cells may contribute enough energy to power a house hold item. Here we are discussing about SOLAR BATTERY CHARGING CIRCUIT WITH OVERCHARGE PROTECTION.




MATERIALS REQUIRED TO WIRE UP THIS CIRCUIT


  • SOLAR PANEL
  • IC LM723
  • 12V BATTERY BACKUP
  • NPN TRANSISTOR (MJ1000)
  • ZENER DIODES (1N5821 & 1N753A)
  • DIODE (1N4002)
  • RESISTORS
  • CAPACITORS

CIRCUIT DIAGRAM OF SIMPLE SOLAR BATTERY CHARGER


solar battery charger



The voltage from solar panel will charge the battery to its maximum level. So there is a possibility of damaging the battery (Load) due to overcharging. In order to avoid this we have to introduce a Voltage Regulator using LM723 IC. The voltage regulator triggers whenever the voltage goes above a predetermined value and it enables the NPN transistor (MJ1000) thus the voltage from the solar panel is being grounded and no charge flows to the load. 


Tittu Thomas

Author & Editor

I'm Tittu Thomas, An Electronics and Communication Engineer from India, Kerala. I love doing hobby electronics circuits, blogging, programming, etc. Started this blog while doing my B-Tech degree under CUSAT university.



13 comments so far:

  1. what about the solar panel specifications that can be used with this charger

    ReplyDelete
  2. I would like to know about the type of battery to be use (12v rechargeable). or is is it something else ??

    ReplyDelete
  3. Ya, the battery that we used here is 12V rechargeable type.

    ReplyDelete
  4. Sir i have a 9 V 200mamp pannel, how can i use it with this circuit.

    ReplyDelete
  5. This comment has been removed by a blog administrator.

    ReplyDelete
  6. I want to know, if I don't have lm723, mj1000, 1n5821, 1n753a and 1n4002, what components can I replace for them?

    ReplyDelete
  7. Nice and Simple, great article.

    What changes should I make if I wish to charge Li-ion battery 3.7V on a 6 V / 1.2W panel ?
    Thanks.

    ReplyDelete
  8. can you provide me the pdf of this project or material regarding this project

    ReplyDelete
  9. can you provide me the pdf of this project or material regarding this project

    ReplyDelete
  10. can you please provide me the material regarding this project or even pdf

    ReplyDelete
  11. Hi sir, can i use the same circuit but ill be using 9v batt instead of 12v? TIA.

    ReplyDelete
  12. Hi Thomas,

    Thank you for ne nice circuit. I was wondering if you want to scale up to large currents (so instead of one panel several ones connected in parallel) all you need to do is to change the specs of the transistor and the Schottky diode 1N5821 (it's not a Zener no?) correct ? How much current can this circuit handle ?

    ReplyDelete

Social Time

Facebook
Like Us
Google Plus
Follow Us
Twitter
Follow Us
Pinterest
Follow Us

Subscribe to our newsletter

(Get fresh updates in your inbox. Unsubscribe at anytime)