Wednesday, 25 February 2015


Now 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 bit complex in compare to PWM charge controller. It requires some basic knowledge of power electronics. I put a lot of effort to make it simple, so that anyone can understand it easily.

The Maximum Power Point Tracker (MPPT) circuit is based around a synchronous buck converter circuit. It steps the higher solar panel voltage down to the charging voltage of the battery. The Arduino tries to maximize the watts input from the solar panel by controlling the duty cycle to keep the solar panel operating at its Maximum Power Point.

This tutorial will cover a project build for a Arduino based Solar MPPT charge controller. It has features like: LCD display, Led Indication, WiFi data logging and provision for charging different USB devices. It is equipped with various protections to protect the circuitry from abnormal condition.

The microcontroller used is in this controller is Arduino Nano. This design is suitable for a 50W solar panel to charge a commonly used 12V lead acid battery. You can also use other Arduino board like Pro Mini, Micro and UNO.

Specification of version-3 charge controller :
1. Based on MPPT algorithm

2. LED indication for the state of charge

3. 20x4 character LCD display for displaying voltages, current, power etc

4. Overvoltage / Lightning protection

5. Reverse power flow protection

6. Short Circuit and Over load protection

7. Wi Fi data logging

8. USB port for Charging Smart Phone /Gadgets

Electrical specifications:

1. Rated Voltage= 12V

2. Maximum current = 5A

3. Maximum load current =10

4. In put Voltage = Solar panel with Open circuit voltage from 12 to 25V

5. Solar panel power = 50W

For more details on this project,you can see my instructables page. The link is given bellow.

1 comment:

  1. Hey i want to design charge controller of 12 v and 4-6amp . could you please suggest me some guide or materialsa


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