"Best" is a nice word. Best with respect to what ?

This job is normally solved using a microcontroller. And it is more about the availability of appropriate peripherals (mainly ADCs with good resolution) than about 'brute computing power' - at least regarding MPPT, which is a rather slow process.

As it is, this job is normally done by the same microcontroller that is also implementing the inverter function - which will really require some 'computing power'.

This week I had a thread in a forum regarding the use of a dsPIC33 device (from www.microchip.com), but there is quite a number of microcontrollers around that are easily capable to do the job.

Regards

"best" means, obtain a good performance in term of time response and efficiency

'time response' is difficult - as well as 'efficiency'.

To get new values for MPPT, it is necessary to deviate from the current setpoint - normally meaning to temporarily have lower efficiency. Thus you will not want to do this too often.

By 'efficiency' I guess you are meaning "precision of finding the MPP" - which relies more on 'good' peripherals than on the 'device' itself.

Anyway, most of MPPT 'quality' is about the control strategy - not so much about the device. For me, quite a number of microcontrollers or digital signal controllers would work well one way or the other.

Thank you dear Dreher !

Hello Saad,

As U. Dreher points out, the question is rather vague.

Myself and a colleague built a MPPT with a MBED-LPC1768 development board that we had on our desk and had it working with some PV panels in a couple of hours. 

I agree with U. Dreher that many microcontrollers should be able to do the job. There is indeed a great deal of performance to be gained from the algorithm itself and by the choice of components in the hardware.

Kind regards,

Jules

Thank you Jules, you say that you have already built a MPPT, i would like to know the kind of converter that you used !

It is a problem, which needs to be investigated.

Accoeding to few publications people prefer PIC, which is enough for this job.

Hello Saad,

We just used an off-the-shelf buck converter and controlled it using PWM. Obviously the converters are quite specific to the overall system specifications. 

All the best,

Jules

To complete previous remarc (4 days ago)  I"d recomend

Low cost DSC  dsPIC33FJ16GS502

from the paper

An Asymmetrical Fuzzy-Logic-Control-Based MPPT Algorithm

for Photovoltaic Systems

Chun-Liang Liu , Jing-Hsiao Chen , Yi-Hua Liu , and Zong-Zhen Yang 

Good luck,

Yury

Thank you Yury!