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Re: OpenEVSE - Open Source Charging Station

Posted: Thu Nov 09, 2017 8:48 pm
by ironmanco
Hey - I was email back and forth with the folks over at OpenEVSE and they are looking for someone with phone app development skills to implement a native phone app (iOS/Android). If you know someone who fits the bill or ARE someone who fits the bill, reach out to Chris over there.

Re: OpenEVSE - Open Source Charging Station

Posted: Fri Nov 10, 2017 10:43 am
by GlennD
Sorry, I am a hardware person with no programming skills. Personally I just want a working EVSE with a timer. Chris maintains a website for wi-fi gui and I guess it works well but I have no interest.

Re: OpenEVSE - Open Source Charging Station

Posted: Fri Nov 10, 2017 11:15 am
by ironmanco
GlennD wrote:Sorry, I am a hardware person with no programming skills. Personally I just want a working EVSE with a timer. Chris maintains a website for wi-fi gui and I guess it works well but I have no interest.


Based on what I understand for optimal battery maintenance being able to control charge not only based on timers but temperature and SOC would be much better.

Re: OpenEVSE - Open Source Charging Station

Posted: Fri Nov 10, 2017 10:38 pm
by GlennD
For the Leaf integrating with Leaf Spy could do it, I think it is a lot of work with minimal returns.

Since I have moved into a CARB car with no support I really have no real interest. My car works for me even with an 87 Mile range. I plan to return it at lease end so I am not worried about the battery. For sure it will make to three years.

My totaled B had 14 months left on a three year lease and 9023 miles. As a retired person I do not drive a lot.

The Leaf is unique in that there is major hacking support. No other car I have ran across has the degree of support. Certainly not the B250E.

Re: OpenEVSE - Open Source Charging Station

Posted: Sat Nov 11, 2017 7:16 am
by JeremyW
Is this a volunteer basis or would they be paid? I know of some app developers who might be interested. PM me details if you wish.

Re: OpenEVSE - Open Source Charging Station

Posted: Sat Nov 11, 2017 7:28 am
by ironmanco
JeremyW wrote:Is this a volunteer basis or would they be paid? I know of some app developers who might be interested. PM me details if you wish.


It was indicated that compensation could be arranged.

Re: OpenEVSE - Open Source Charging Station

Posted: Sun Feb 11, 2018 3:22 pm
by GlennD
I have found that the Barbouri and Chris's DIY board layout is wring. They are using pin 7 as an output. It really exists for an optional bias resistor.The correct pin is pin 6. There is an easy fix since we do not use pin 7. Simply remove pin 7 from the device and bridge pins 6 & 7 together.

It is funny in that there are many, many Barbouri boards out there that work fine using the photo diode output. In all cases the schematic is correct but the board layout is wrong.. It is better to use the full output circuit.

Re: OpenEVSE - Open Source Charging Station

Posted: Mon Feb 12, 2018 7:03 pm
by gridstop
I know the Open EVSE supports changing charging current via the serial interface (and by the UI), but can this be done in the middle of charging? Or does it have to stop and re-start?

And will the leaf respond on the fly and lower/raise current? I've been thinking about whether Open EVSE could be used to make a dual charger for a single 40A line and negotiate current between the two of them. Or possibly sharing a single 40A line with a garage heater (so when the heater is on, lower current to 14A or something).

Re: OpenEVSE - Open Source Charging Station

Posted: Tue Feb 13, 2018 7:39 am
by davewill
gridstop wrote:I know the Open EVSE supports changing charging current via the serial interface (and by the UI), but can this be done in the middle of charging? Or does it have to stop and re-start?

And will the leaf respond on the fly and lower/raise current? I've been thinking about whether Open EVSE could be used to make a dual charger for a single 40A line and negotiate current between the two of them. Or possibly sharing a single 40A line with a garage heater (so when the heater is on, lower current to 14A or something).


The answers are Yes and Yes. You could definitely do this. There is a large installation in the LA area that does this with OpenEVSE based units. I tried to find a link for it, but couldn't.

Re: OpenEVSE - Open Source Charging Station

Posted: Wed Feb 14, 2018 1:37 am
by drees
davewill wrote:The answers are Yes and Yes. You could definitely do this. There is a large installation in the LA area that does this with OpenEVSE based units. I tried to find a link for it, but couldn't.

Free Destination Charging: 50x L2 80A Stations @ Caltech, Pasadena, CA
There's a mix of technology used there now, not sure how much is OpenEVSE units.