I agree with Enrico,
Building your own PV cells is a major pain, they are EXTREMELY fragile, look at them the wrong way and they break.
I think that a good experiment would be to see just how much power we can get from a PV cell by implementing an MPPT algorithm and solar tracking versus a stationary cell. My gut tells me that implementing those systems would improve the overall efficiency of the array(Obviously the MPPT hardware as well as the tracking setup consume energy however I don't think a carefully designed system would produce let power then a stand alone cell so at least some improvement would be observed).
I've been wanting to perform such an experiment, but at the moment I don't have the means. The issue I see with the MPPT is that you control the input of a converter block to present an ideal load to the cell, the control loop will do whatever it takes to keep the solar cell producing peak output power therefore at the output we will have widely varying voltage(current) which wouldn't be easily usable. My solution to this would be to interface the output of the MPPT to a buck-boost topology converter(ZETA, SEPIC, Cuk, Buck-Boost, etc.) which would deal with the varying output of the MPPT.
With a stable DC voltage an additional inverter would allow for the AC conversion. Obviously there are three stages here so the overall system efficiency would probably be in the 70-85% range(I don't know where I'm getting the numbers from my gut I guess)
It's just an idea, and there are people much smarter than myself on this forum so I'm sure there will be lots of better suggestions.
My 2 cents,
Jorge Garcia
I agree with Enrico,
Building your own PV cells is a major pain, they are EXTREMELY fragile, look at them the wrong way and they break.
I think that a good experiment would be to see just how much power we can get from a PV cell by implementing an MPPT algorithm and solar tracking versus a stationary cell. My gut tells me that implementing those systems would improve the overall efficiency of the array(Obviously the MPPT hardware as well as the tracking setup consume energy however I don't think a carefully designed system would produce let power then a stand alone cell so at least some improvement would be observed).
I've been wanting to perform such an experiment, but at the moment I don't have the means. The issue I see with the MPPT is that you control the input of a converter block to present an ideal load to the cell, the control loop will do whatever it takes to keep the solar cell producing peak output power therefore at the output we will have widely varying voltage(current) which wouldn't be easily usable. My solution to this would be to interface the output of the MPPT to a buck-boost topology converter(ZETA, SEPIC, Cuk, Buck-Boost, etc.) which would deal with the varying output of the MPPT.
With a stable DC voltage an additional inverter would allow for the AC conversion. Obviously there are three stages here so the overall system efficiency would probably be in the 70-85% range(I don't know where I'm getting the numbers from my gut I guess)
It's just an idea, and there are people much smarter than myself on this forum so I'm sure there will be lots of better suggestions.
My 2 cents,
Jorge Garcia