1. 1. Enric, P.U and Michael M.D (1998): Recommended Practices for Charge Controllers. Renewable Energy and Hybrid System Group CANMET Energy Diversification Research Laboratory.
   2. Gazi, S.M., Muhaiminul, I and Salim, K.M (2009): Design and Construction of Microcontroller Based Maximum Power Point PWM Charge Controller for Photovoltaic Application. Development in Renewable Energy Technology (2009) 1st International Conference, Pp. 1-4.
   3. Jaya, N. I (2012): PIC Based Solar Charging Controller For Battery. International Journal of Engineering Science and Technology (IJEST), Pp 384.
   4. Vikas, K. (2012): Microcontroller Based solar charge controller for power Application. International Journal of Electronics Communication and Computer Engineering. Volume 3, Issue 1.