As a result of a researching project with the University of Applied Sciences FH Stralsund we developed a DCDC-Buck-converter for fuel cell systems. The converter delivers selectable output voltages and can be equipped with different battery charging methods. It is possible to connect the converter to miscellaneous battery systems like lead-type batteries, NiMH or even modern LiIon type accumulators. Technical data Input voltage UEin : 16 . 42V Output voltage : selectable, max. UEin-3V Output current IAus : 32A Continuity, short time (5Min.) overload to 110% Efficiency: hmax : > 97% Averaged efficiency : >= 92% (for all input-voltages) nEN Connectors : screwed contact with M5-bolts Case : aluminum Cooling : passive Battery charging : lead-acid-battery, NiMH, trickle charge, flexible adaptable(NiMH, LiIon) Communication interface : RS232, USB