For those of you interested in the spec for the MPPT used by the dutch team Nuon (won the International solar challenge 4 times with this solar mppt), well here it is:
Features:
High Conversion Efficiency up to 99%
Seeks and Tracks MPP with closed loop algorithm
Wide I/O Range
High Reliability and Durability due to Low Thermal Stressing
Separate Control and Power Part
Data Transmission via CAN Bus
Input and Output Protection
End of charge current control
The 200 - 800 W MPPT uses an Active Snubber Circuit with zero-voltage/zero-current switching for all active semiconductors. The absence of almost any switching losses makes this converter ideal for solar cars and any solar power application which needs extremely high efficiency over a wide power range.
This solar maximum power point tracker is manufactured by Drivetek AG in Germany.

