LEAFfan wrote:Whoa there buddy! I guess you read something different than I did from Jack. He said he will do it WITH the SAFETY features intact which includes the GFI. I think your post is way out of line and premature. Trying to scare people into buying your expensive mod borders on greed and jealousy. And no, you obviously do not support other efforts like this, contrary to your statement. You should be giving him compliments for being able to engineer a simpler, less expensive 240V SAFE EVSE mod. He seems much more professional to me than you do after your premature scathing post.
Note the "as presently implemented" in my first sentence. Note Jack's own words:
jwallace3 wrote:Right now i simply have 240 wired to the J1772 connector. One leg right now is always hot on the connector which obviously isn't ideal, but hey, so is any extension cord that you plug in right? It's not that terrible. The other leg gets closed in when the relay closes and charging begins. Very simple. My above plan is what I intend on doing in the long run for a mod
This is indeed a safety disaster, any other engineer (or almost anyone even remotely familiar with electricity) here will back me up. Note that he wrote "My above plan is what I intend on doing in the long run for a mod". Most definitely unsafe and shame on him for proposing that it's somehow safe, and suggesting that other people perform dangerous acts. He risks litigation and loss of his ability to practice if he is indeed a PE.
There are several other people here working on various EVSE projects which seem sane and well thought out, and I think they are fine to present. (Such as Chris Howell's)
Obviously there are people reading this that don't fully understand the ramifications of bypassing circuits in the EVSE. Even his present circuit including the extra relay STILL eliminates the ground fault detection circuitry in the EVSE!
Since the huge majority of our customers are not about to start taking things apart to save a little money, this is no threat to us. In any event, I welcome the day when EV'ers can walk into any appliance store and buy a nice EVSE for under $100. I personally have designed one that's safe and fully featured, but unfortunately there is not yet a business case until there are more potential customers (read: More EV's on the road). This is why evseupgrade exists, and will exist for a little while longer until economies of scale kick in, costs drop, and there are better and cheaper products on the market, and then we will no longer need to offer upgrades to fill this void.
If a person is qualified to make his own modifications and upgrades, then by all means go for it. Any true engineers will already know how to do it, it's not rocket science here. If you don't fully understand what you are doing, then I cannot recommend you do it, as lethal energy is at play. I've told the people wanting to modify things in their LEAF for various reasons the same thing. It takes a lot of engineering time and testing to verify a system as safe, and it is clear that none of this has been done. A good engineer would never consider altering a system that has not been fully understood, and clearly this is happening here.