dc fast charge

Hi all, I am looking for the CHAdeMO or SAE control (handshake) specifications as we are building our own 50kw low cost DC charger. Is it a closed specification? If so where is the best place to access this or can we just purchase the control boards? If anyone has any ideas that would be...

According to lemnet.org the SAE CSS / Combo 2 connectors (IEC 62196-3) for combined AC and DC fast-charging are becoming widely available in Europe and the European council decided to put a halt on the distribution of Chademo stations. Living in Switzerland, I decided to install a Combo 2 socket...