2 ms·
Thanks for the experience sharing and the blog, it is very interesting to read and your humility about the feedback is definitively appreciated. I currently al
by adev_ 3y ago
Thanks for the experience sharing and the blog, it is very interesting to read and your humility about the feedback is definitively appreciated.
I currently also did my own DIY EVSE charger mainly for fun [1].
If you are interested about the main differences between your approach and mine:
(1) I use an industrial contactor DIN form factor for the power switch instead of passing the power through the relay directly. Mainly for safety reasons (I do not trust much small relays) and also because I wanted to support three-phase power for an European T2 installation.
(2) Instead of printing my own PCB with an Arduino for the PWN, I just bought one command module from China/UK provider. Mainly for pure lazyness reason :) The module itself is shield behind the RCD class B.
(3) I have added a shelly 3EM front of the system. To use it as a watt-meter with MQTT report and also as a remote control system.
My little advice for people interested to do their own: DIY is always an excellent way to learn and if you want to do your own, do it... BUT please make your installation reviewed by someone with an electrical engineering or technician background if possible. These systems can easily pump 7 to 22KW during extended period of time: Any cable which is not screwed properly or under-sized can bring you a fire.
[1]: https://github.com/adevress/open-ev-station/blob/master/README-fr.md https://github.com/adevress/open-ev-station/blob/master/READ...