OpenEVSE - Open Source Charging Station

[GlennD]

Well, I have tried the cyan filter for several weeks. It is definitely brighter. I just put back in the blue filter. It is not as bright but bright enough and it looks so cool. I favor the less bright blue filter. Any filter is better than none.

I purchased a 2X20 display from eBay that came with a blue filter bonded to the glass. It works fine as a 2X16 display with 4 digits on the end not functioning. An escutcheon will fix that and only show the active digits. It was only $20.

[BudT]

I'm a new Leaf (2016 SV) owner, lurking and learning here. I'm also a geek and data nerd. I like to build electronics projects (ham radio stuff, arduino and r pi stuff, etc). So naturally I'm drawn to OpenEVSE.

Since my Leaf has an onboard 6.6 kW charger, the max charge current at 240VAC is going to be 27.5A, therefore I have no need for a 50A EVSE. Am I missing anything here? Accordingly, I'll plan on building a 30A kit. I have no need for portability, so I'll *probably* be hard wiring this in my garage.

[Marktm]

It's an easy build. I plan on using the included RAPI interface to set the amperes via an arduino to "opportunity" charge with my off-grid solar PV array. Very flexible design.

[GlennD]

The 30A kit is limited to 24A ( 80% of 30A) That is fine for a Leaf but you are limited to slightly less than 3A. 24A vs 27.5A. The Leaf follows the J1772 specifications so the slightly longer charging time is usually OK.

[BudT]

The 30A kit is limited to 24A ( 80% of 30A) That is fine for a Leaf but you are limited to slightly less than 3A. 24A vs 27.5A. The Leaf follows the J1772 specifications so the slightly longer charging time is usually OK.

So perhaps I should build the 50A kit for nominally the same cost and gain that extra 3.5A?

I was also thinking about interfacing with an arduino hat would activate charging when my home PV system production reached some threshold value.

[GlennD]

I just build basic menu controlled EVSE's but some have used Lincomatic's RAPI to do some amazing things. Chris Howell has even interfaced a wi-fi unit to it. Controlling your EVSE with solar power should be possible for someone with programming skills.

Just remember that the NEC considers an EVSE to be a continuous load and you have to derate to 80%. Thus a 50A EVSE is good for 40A etc

[Marktm]

So perhaps I should build the 50A kit for nominally the same cost and gain that extra 3.5A?

I was also thinking about interfacing with an arduino hat would activate charging when my home PV system production reached some threshold value.

I'm in the final stages of arduino based control using RAPI interface to control the amp setting on the OE. Having no prior experience in IDE programming and arduino hardware, it's been a "learning" experience. You can PM me if you would like to know more.

[stopeject]

Hello,
I read what I could find on OpenEVSE. The plans for an Android app and web interface were discussed a while ago, however I didn't see anything on the current development status. Is OpenEVSE still under active development?

[Marktm]

Hello,
I read what I could find on OpenEVSE. The plans for an Android app and web interface were discussed a while ago, however I didn't see anything on the current development status. Is OpenEVSE still under active development?

If you post specific requests on the OpenEVSE forum, Chris Howell will get back with you - very helpful developer.

[stopeject]

Thanks. I found a link to this thread in on of the OpenEVSE documents, and since I already had an account I decide to post here.
http://www.fveaa.org/fb/J1772_386.pdf