I have not been very active at TMC with OpenEVSE info. There have been a handful of Tesla owners that have built OpenEVSE units at 40A+, however most development has focused on 30A portable units. I have just released a new board and kit that fit the needs of Tesla owners better. I have been using a prototype 40A unit to charge my Model S for several months as has another TMC member. My UMC now is in the car where it should be...
OpenEVSE Plus v3 is now avaliable.
http://store.openevse.com/products/copy-of-openevse-plus-v3 .
It is a board specifically designed for Level 2 charging stations. To the standard OpenEVSE features (basically everything required in SAE J1772) it adds a opto-isolated line voltage AC relay trigger to drive large contactors. It also adds current measurement.
To go along with the new board is a 50A Level 2 Charging station kit.
50A Kit
Build Guide for 50A Charging Station Kit
OpenEVSE 50A Charging Station - OpenEV
http://d17kynu4zpq5hy.cloudfront.net/igi/openevse/uhIhbvIpU14VLu5G.medium
OpenEVSE Plus v3 is now avaliable.
http://store.openevse.com/products/copy-of-openevse-plus-v3 .
It is a board specifically designed for Level 2 charging stations. To the standard OpenEVSE features (basically everything required in SAE J1772) it adds a opto-isolated line voltage AC relay trigger to drive large contactors. It also adds current measurement.
To go along with the new board is a 50A Level 2 Charging station kit.
50A Kit
Build Guide for 50A Charging Station Kit
OpenEVSE 50A Charging Station - OpenEV
http://d17kynu4zpq5hy.cloudfront.net/igi/openevse/uhIhbvIpU14VLu5G.medium